Grouting

Home \ Our Services \ Grouting

Grouting Singapore

 

Le Fong possess a wide range of specialist grouting Singapore plant that is able to operate at a range of pressures up to 1000psi, and, are proven with a variety of specialist cementitous grout mix designs, including sand:cement, cement:bentonite and plasticisers. Water reducing agents and plasticisers are regularly used within our day-to-day grouting operations to improve workability and reduce bleed.

We provide the following grouting services:

  • Chipping Concrete Pressure Grouting
  • Foam, PU, Epoxy & Cementitious Grouting
  • Acrylic Gel Grouting for Soil Reinforcement
  • Leakage Investigation & Repair
  • Shotcreting
  • Tunnel Repairs

A range of proven cementitous grouting techniques are available in-house including:

  • Ground improvement and soil stabilisation grouting for enhancement of the mechanical properties of the soil and remediate problems associated with subsidence
  • Under-slab grouting and re-levelling
  • Bentonite/cement grouting to impregnate open soil
  • Fissured rock grouting typically performed in downward phases
  • Void filling to eliminate collapses, sink holes or depressions associated with deformation of the ground surface
  • Tube-a-manchette grouting to improve uplift resistance of bridge substructures and foundations (the tube-a-manchette is first sealed in place followed by grouting via a double-packer located over discretely positioned valves within the tube-a-manchette)
  • High-pressure (5MPa) post-grouting in weak soils to improve the bond capacity of ground anchors and soil nails
  • Structural steel and foundation grouting
  • Precast concrete grouting for panels, barriers, and columns and associated connections

We provide a full range of specialist construction services in the fields of grouting, ground anchoring, soil nailing, post-tensioning and drilling. Our reputation as a construction company in Singapore has been built on providing practical and cost effective solutions and we have the right mix of people, resources and expertise required to make your next project a success.

Over the years, a tradition of excellence in civil and structural engineering and construction has become one of our top priorities. Our continually developing technology, operational performance and willingness to innovate, together offers our clients a service of the highest quality and the benefit of sustainable assets.

Grouting Singapore

Grouting Services

Grouting

Grouting Singapore

For grouting of gaps with thicknesses ranging from 50 mm to 250 mm.

Some application examples

  • Structural reinstatement of reinforced concrete beams and pillars.
  • Restoring the lower flanges of pre-stressed concrete beams of viaducts.
  • Reinstatement of floor beams and slabs after scarification of deteriorated areas.
  • Restoring concrete floors (industrial, road and airport).
  • Grouting of machine baseplates, bridge bearing.

Technical Characteristics

It is a ready-mixed powder composed of high strength cement, selected aggregates and special additives with an expansive agent prepared according to a formula developed in research laboratories.

It once mixed with water, becomes a fluid mortar, suitable for pouring into formwork without separation of the aggregates even when forming great thicknesses.

It once cured, has the following qualities:

  • very high flexural and compressive strength;
  • modulus of elasticity and coefficients of thermal expansions and permeability to water vapour similar to those of high quality concrete;
  • waterproof;
  • high adhesion to old concrete, providing it has been saturated with water beforehand, and to reinforcing rods especially if they have been treated, two-component and one component;
  • high resistance to wear due to abrasion

It is recommended for voids up to 250 mm for single placing.

Recommendations

  • Do not use it on smooth concrete surfaces; roughen them well and insert reinforcing rods if needed.
  • Do not use it for precision anchorages.
  • Do not use it for applications by spray or trowel.
  • Do not add cement or additives to it.
  • Do not add water after the mix has begun to set.
  • Do not use it if its packing has been damaged or if it has been opened prior to use.

Preparing the substrate

  • Remove degraded and loose concrete until the substrate is solid, resistant and rough. Any previous restoration work which is not soundly bonded should also be removed.
  • Clean the concrete and reinforcing rods by sandblasting, to remove all dirt, rust, cement laitance, grease, oil and previously applied paints.
  • Soak the substrate with water.
  • Allow the excess water to evaporate before pouring in the mix; if necessary, use compressed air to facilitate the removal of the free water.

Preparing the mortar

Pour 3.3-3.5 litres of water into a concrete mixer.

Start the mixer and slowly and continuously pour in.

Mix for 1-2 minutes, scrape any unmixed powder off the sides of the mixer and remix for another 2-3 minutes until the mix is fluid and free from lumps.

Depending on the quantity being prepared, a mortar mixer or drilling machine with a stirrer attachment can be used.

Avoid stirring an excess of air into the mix. Only in exceptional circumstances should the slurry be mixed by hand. Only where it is absolutely necessary, prepare small quantities and mix for at least 5-6 minutes until the slurry is completely smooth and even. It should be remembered that manual preparation requires greater quantities of water, which are detrimental to some of its characteristics, such as mechanical strength, shrinkage, waterproofing, etc

The expansion has been calculated to compensate for hygrometric shrinkage.

In order to be effective, the forces of expansion must be countered with suitable reinforcement or formwork around the substrate.

The expansion phase is completed during the first days of curing.

Applying the mortar

To facilitate the expulsion of air, pour it continuously into the moulds.

Water from it must not be absorbed by the formwork, which should be pre-treated with a form-release oil.

The pour does not need to be vibrated. Make sure that all the parts have been filled. If necessary, use sticks or rods to tamp the slurry into particularly difficult areas.

As an option, it can be applied on the surfaces to enhance the protection against oils and acids.

Precautions to be observed during application and curing

No special precautions need to be taken when the temperature is around +20°C.

In hot weather, it is advisable to prevent the material from being exposed to the sun and to use cold water for preparing the mix.

When the temperature is low, the water used for the mix should be around 20°C.

Once poured, it must be cured very carefully. The surface of the mortar exposed to air must be protected against the rapid evaporation of water particularly in warm and windy environments, as this will cause surface cracks due to plastic shrinkage.

Spray water onto the surface during the first 24 hours of curing or apply a suitable anti-evaporation product.

Cleaning

Before hardening, the slurry can be cleaned from tools with water. After setting, cleaning is very difficult and it can only be removed mechanically

Consumption

20 kg/m2 per cm of thickness.

Packaging

25 kg bags.

Storage

12 months in original packaging in a dry place.

 

Product Identification

Type: powder

Colour: grey

Maximum aggregate diameter (mm): 6

Density (kg/m3 ): 1300

Dry solid content (%): 100

Hazard classification according to EC 1999/45: Irritant. Before using, refer to the “Safety Instruction for the preparation and application” paragraph and the information on the packaging and safety data sheet.

Customs code: 38245090

Application Data

Colour of the mix: grey

Mixing ratio:one 25 kg bag with 3.3-3.5 litres of water

Consistency of mix: fluid

Density of mix (kg/m3 ): 2250

pH of the mix: >12

Application temperature range: from +5ºC to +35ºC

Pot life at +23ºC and 50% R.H.: 60 minutes

Maximum thickness per application (mm): 250

Final Performance

Mechanical characteriostics:
(according to EN 196/1 – mixing water 13.5%) Compressive strength MPa):

– after 1 day: > 25

– after 7 days: > 55

– after 28 days: > 75

Flexural strength (MPs):

– after 1 day: > 6

– after 7 days: > 8

– after 28 days: > 9

Adherence to substrate (MPs):
(measured by pull-off test on damp concrete):

– after 7 days (+23ºC and 50% R.H.): > 3 (concrete failure)

– after 21 days (7 days at +23ºC and 50% R.H. + 21 days at +60ºC: > 3 (concrete failure)

– after 28 days (7 days at +23ºC and 50% R.H. +21 days at +20ºC: > 3 (concrete failure)

Rapid Chloride Permeability (Coulombs) < 1000

 

Consistency: Fluid

Slump (%) According to uni norm 7044/72: ≥ 160

Litres of water per 25 KG Bag: 3.3 – 3.5

Non-shrink Grout – ST-NSG

General purpose shrinkage compensated cementitious grouting material with superior flowability, high compressive strength and non-shrink properties.

Product Description

ST-NSG is a dry packed proprietary premixed shrinkage compensating cementitious precision grout. It is specially designed for the use of grouting at gaps, holes and base plates, etc. where excessive shrinkage is prohibited for the filling material. It can also be used, when mixed to a lower workability, as a patching material for minor repairs for honeycombs or for filling up tie-holes in concrete. ST-NSG is composed of Ordinary Portland cement, graded sand and non-shrink additives, which impart controlled expansion in both the plastic and hardened states.

Features & Benefits

  • Expansion at early stage and shrinkage compensated at ultimate stage
  • High early strength and ultimate strength
  • Can be mixed to plastic, flowable and fluid states with different water addition
  • Free from chlorides, nitrates and sulphates
  • High ultimate strength & low permeability
  • Hydrogen free gaseous expansion
  • No bleeding or segregation

Substrate Preparation

The substrate surface must be free from oil, grease, or any kind of loose particles. Interfaces must be patched up to avoid scales, coatings, recessives, pockets, etc. to avoid hindrance of the flow/spread of grout. Bolt holes or fixing pockets must be blown clean to get rid of any dirt or debris. Pressure relief holes/exit should be provided to allow venting of isolated high spots. At appropriate time before grouting, normally several hours, interfaces must be pre-soaked with fresh water and clear up all free water on surfaces thereafter. When leveling shims are used and are to be removed after the grout goes hardened, they should be treated with a thin layer of grease before installation. Formwork should be leak-proof. Rubber/polystyrene stoppers or sealants can be used at joints or bolt holes.

Area of Application

  • Filling up gaps between reinforced concrete and/or precast concrete elements
  • Patching material for concrete repairs
  • Structural concrete repair by grouting
  • Filling up tie-holes in concrete
  • Bridge bearings
  • Machine base plates, etc.
  • Applying underwater or in tidal zone
  • Consult Score Tech’s staff for other suitable applications

Mixing & Installation

  1. Mix ST-NSG with electric drill in bucket or all-in-one grouting pump until the required consistency is achieved homogeneously.
  2. When mixing with electric drill for grouting purpose, mix the material with 80% of the recommended quantity of water for at least 3-4 minutes and then add the remaining water and mix for another 1-2 minutes to achieve the best effect of flowability.
  3. Sufficient grout must be made available in order to ensure continuous grout pour is achieved. The mixed grout should be poured only from one side to the other side to reduce entrapment of air.
  4. For large volume of grouting, ST-NSG can be applied by pump such as heavy-duty diaphragm pump, screw feed pump or piston pump.

Curing

Under normal circumstances, natural air curing is proved adequate for ST-NSG. However, water mist curing is beneficial to ensure the best performance of ST-NSG under dry or windy condition.

Area of Application

  • Filling up gaps between reinforced concrete and/or precast concrete elements
  • Patching material for concrete repairs
  • Structural concrete repair by grouting
  • Filling up tie-holes in concrete
  • Bridge bearings
  • Machine base plates, etc.
  • Applying underwater or in tidal zone
  • Consult Score Tech’s staff for other suitable applications

Package: 30 kg bag

Shelf Life: ST-NSG has a shelf life of 12 months if well kept in dry condition on lifted floor.

Health & Safety

Wear NIOSH approved face mask or equivalent personal protective equipment when handling the material. ST-NSG contains cement which may cause an allergic effect or irritation to eyes and skin. When contact with eyes, flush immediately with large quantity of water.

Reference Standards

  • British Standard: BS 6319; BS 1881;
  • Amercian Standard: ASTM C827; ASTM C1090; ASTM C939
  • Hong Kong Standard: ArchSD General Specification; HKHA MTS Spec. Part D; Product Certificate PCCS-RM; CS1:2010

Technical Data

StoPox IH BV

(formerly known as StoJet IH-BV)
Two-components solvent-free, epoxy resin

Characteristics

Functionality

  • Low viscosity
  • Economical
  • Resistant to wide range of chemicals
  • Virtually impermeable therefore protecting the concrete against carbonation
  • High compressive and tensile strength
  • High slant shear bond strength

Application

Apply by roller / squeegee as a primer or injection method when repairing cracks

Area of use

  • Structural repair of cracked concrete by injection
  • Repair and filling of small hairline cracks in reinforced concrete structures
  • Primer for solvent-free coating/topping systems • Sealer for cement-based surfaces
  • Steel-plate bonding

Technical Data

The values stated are average values. Due to the use of natural raw material in our products, the actual value determined on an individual delivery may deviate slightly, without compromising product suitability.

Application

Substrate preparation

The substrate to be treated must be sound, dry and free from any contaminants which may prevent good adhesion.

If necessary, the surface should be prepared by mechanical means.

Substrate preparation (cont’d)

When used as a primer/sealer, the maximum moisture content of the substrate should be < 4%, and the pull-off strength of pretreated substrate should be > 1.5 N/mm2.

Material preparation

Stir the individual components of StoPox IH BV thoroughly. Pour both components into a mixing vessel and mix for approximately 5 minutes using slow-speed drill and paddle until a homogeneous mixture is obtained. Transfer the contents to a clean container and re-mix. Use the product as quickly as possible after mixing.

Coating procedure

As a primer or sealer:

StoPox IH BV can be applied by means of a squeegee, roller or sprayed in one layer as a primer or two layers as a sealer.

If necessary, scatter each freshly applied layer Sto Filler 30/60 @ approximately 1.0kg/ m2, otherwise remove surface gloss with a mechanical grinder.

As an injection system for crack repair:

Prepare surface by removing laitance, dust, paint, skim coat etc, along the crack for a width of approximately 50mm.

Attach the injection nipple by applying a bead of Sto epoxy crack sealer on the back and then stick it at approximately 300mm c/c along the crack.

Seal the remaining parts of the cracks with Sto epoxy crack sealer. It should be applied in strips of approximately 50mm width and 2mm thickness along the length of the crack. Allow the sealer to cure overnight.

Begin injection at the lowest nipple upward or from one end of the crack if it is horizontal. Once StoPox IH BV has fully cured/hardened, remove the injectors and sealer by grinding.

Working Life

At 10°C approx. 2 hours

At 23°C approx. 90 mins

At 30°C approx. 45 mins

Curing Time

At 23°C

Tack free 6 hours

Retouchable 24 hours

Overcoat 24 hours

Full cure 7 days

Consumption

When use as a primer or sealer, coverage rate is approximately 200 – 300g/m2, depending on porosity of the substrate.

Application Temperature

Minimum application temperature +15°C

Maximum application temperature +45°C

 

Cleaning of Tools

Tools must be cleaned immediately after use with thinner.

Delivery

Colour: Colourless

Packing: StoPox IH BV is available in 1kg, 4kg and 15kg set.

Storage

Storage Life/conditions: The shelf life of StoPox IH BV is approximately 12 months if stored in cool dry conditions.

Special Notes

Safety Precautions:

After full curing, StoPox IH BV is physiologically harmless. Keep the resin and hardener away from eyes, mouth and skin. Do not inhale vapour. Protective gloves should be used when handling this product. If skin contact with resin occurs, cleaned immediately with soap and plenty of water. DO NOT use solvent. The use of goggles is recommended, however, should accidental eye contamination occur, rinse thoroughly with plenty of clean running water and seek medical treatment immediately.

Technical Support:

Please consult Sto Technical Service Department or the local sales office for further information and any site assistance required.

Disclaimer:

Sto Products are guaranteed against defective materials and manufacture and are sold subject to its standard terms and conditions. Whilst efforts are made to ensure that any advice, recommendation, specification or information STO SEA may give is accurate and correct, it cannot accept any liability either directly or indirectly arising from the use of its products as it has no direct or continuous control over where or how the products are applied, whether or not in accordance with any advice, specification, recommendation or information given by it. If any product fails to conform, STO SEA will replace the product at no cost to the buyer. Replacement of any products shall be the sole and exclusive remedy available and buyer shall have no claim for incidental or consequential damages. Any warranty claim must be made within six months from the date of the claimed breach. Buyers shall be solely responsible for determining the suitability of products for their intended use.

 

HA Cut AF : longevity of cured material

Introduction

This report describes tests to estimate the longevity of cured HA Cut AF; the principle is to expose cured HA Cut AF to higher temperatures (80°C and 50 °C) and to monitor the decrease in compressive strength under both storage conditions until a critical level is reached. In this experiments the critical level of the compressive strength is 80 % of the original value. If the decrease in both conditions is different, the results can be put in an Arrhenius plot. With this equation it will be possible to extrapolate the time needed to decrease the tensile strength to 80 % of the starting value at e.g. 20°C.

Method

HA Cut AF is cured in confined conditions in a stainless steel mold. The cured product is cut in blocks of 4 cm x 4 cm x 4 cm. In total 60 blocks were made. The blocks are stored in sand 0,2–0,4 mm; half of the samples is stored in a closed recipient at 50 °C and the other half is stored at 80 °C. At regular time intervals 4 samples of each test condition are tested on compressive strength. This monitoring is done until a decrease of the compressive strength of 20 % in one or both conditions can be observed. The difference in the rate of decrease in both conditions allows to put the data in an Arrhenius plot. With the Arrhenius plot an extrapolation can be made of the time needed to reach a decrease of 20 % in compressive strength at normal conditions, eg. 20°C. The test started on 07/09/2016 and ended on 07/12/2017.

Results

The following graph shows the results of the compressive strength measurements. The results are expressed as % of the starting value; the starting compressive strength was 55 MPa. Each data point is the average of 4 individual measurements.

With the equations of both trend lines the time for the compressive strength to drop to 80 % of the starting value can be calculated. The following Arrhenius plot can be made by putting the temperatures in 1/K * 1000 and taking the logarithm of the time in hours.

 

In this way it can be calculated how long it would take at 20°C for the compressive strength of HA Cut AF to drop to 80 % of the starting value : the result of this calculation is more than 120 years.

Conclusion

In order to try to assess the life expectancy of cured HA Cut AF, a product property has to be monitored and a critical value is to be chosen; in the reported experiments the monitored property is the compressive strength of HA Cut AF samples stored in wet sand at 50°C and 80°C, and the criticial value is set at 80 % of the starting compressive strength.

The evolution of the compressive strength was monitored during 15 months. Out off the difference of the evolution of the compressive strength of samples stored at 50°C and 80°C an Arrhenius plot can be made; this plot enables to extrapolate the time required for the compressive strength to drop until 80 % of the starting value at ambient temperatures. The outcome of the tests in this report is that it takes at least 120 years for the compressive strength of HA Cut AF to drop to 80 % of the original value when in contact with wet sand at 20°C.

Hydro Active® Cut CFL AF

Next generation, phthalate free, closed cell, 1-component, high performance, low viscosity, hydrophobic, hydro-active, semi-rigid polyurethane injection grout for cutting off gushing water leaks with a high flow rate and/or high hydrostatic pressure in applications where both high strength and flexibility are required.

Product Description

In its uncured form, Hydro Active® Cut CFL AF (hereby referred to as HA Cut CFL AF) is a dark brown, non-flammable liquid without phthalate plasticisers. HA Cut CFL AF is a next generation 1- component injection resin with improved waterproofing and water cutting performance. When it comes in contact with water, the grout expands and quickly (depending on temperature and the amount of catalyst HA Cut Cat AF used) cures to a tough, semi-rigid, closed-cell polyurethane foam that is generally unaffected by corrosive environments.

 

Field of Application

• Designed for cutting off gushing water leaks with a high flow rate and/or high hydrostatic pressure in moving or non-moving joints or cracks.

• Used to block leaks into diaphragm walls.

• Filling large voids such as rock fissures, crushed faults, gravel layers, joints, cracks and honeycombs in concrete structures that are subjected to small settlement or movement.

• For curtain injections behind tunnel segments.

• For screen injection behind porous structures when high velocity water streams are present.

Product Advantages

• ADR free transport

• Next generation resin with improved waterproofing performance

• Improved cell structure of the cured compound resulting in better mechanical properties and durability

• Phthalate free resins, REACH compliant

• Improved performance at temperatures below 5°C, no crystallisation of HA Cut Cat AF

• Fast, Extra-Fast and Super Extra-Fast catalysts available for applications where the standard catalyst reaction speed is insufficient due to low temperatures or very high water flow (See respective Technical Data Sheet)

• HA Cut CFL AF forms a semi-rigid gasket with high strength and a small amount of flexibility in the joint or crack

• Non-flammable, solvent free

• User friendly: 1-component material

• Controllable reaction times: by using catalyst curing times can be reduced

• Cured compound is resistant to most organic solvents, mild acids, alkalis and micro-organisms (*)

(*) For chemical resistances please contact your local GCP representative.

Application

Before commencing the injection, consult the Technical Data Sheets and Material Safety Data Sheet (MSDS) in order to be familiar with the materials at hand. Always shake the HA Cut Cat AF well before use.

 

1. Surface Preparation

• Remove surface contaminants and debris to establish the pattern of the crack or joint. Active leaking cracks larger than 3mm need to be sealed with an approved method.

• Drill holes of the correct diameter for the selected packer. Drill at an angle of 45°. Preferably the holes should be drilled staggered around the crack to insure good coverage of the crack in case it is not perpendicular to the concrete surface.

• The depth of the bore should be approximately half of the thickness of the concrete. As a rule of thumb the distance of the drill point from the crack is half the wall thickness.

• Distance between holes can vary by 15 to 90cm, depending on the actual situation.

• Insert the correctly sized packer into the hole up to 2/3 of its length. Tighten with a wrench or spanner by turning clockwise until sufficient tension has been reached to keep the packer in place during injection.

• Flush the crack with water before injecting with resin. This will flush out dust, debris and prime the crack for the injection resin and improve penetration of the product into the crack. Water in the crack will activate the resin.

 

2. Resin and Equipment Preparation

• Prepare the resin with the predetermined amount of catalyst. Shake HA Cut Cat AF well before use.

• No reaction with the resin will occur until the resin comes into contact with water.

• Protect the resin from water, since this will trigger a reaction in the container used and might cause the resin to harden or foam prematurely within the injection equipment.

• It is highly recommended to use separate pumps for the water and the resin injection to prevent cross contamination and blockages.

• The pumps should be thoroughly primed with Washing Agent Eco to lubricate and dry the system before injection. We recommend the use of pneumatic or electric 1-component pumps.

 

3. Injection

• Start the injection at the first packer.

• Start injecting at the lowest pressure setting of the pump. Slowly increase the pressure until the resin begins to flow. Pressures may vary from 14 bars to 200 bars depending on the size of the crack, the thickness of the concrete and the general condition of the concrete.

• A little leakage of resin through the concrete or crack is useful in showing the extent of resin travel. Large leaks should be plugged with rags, wait for the resin to set, then inject again.

• During the injection water will first flow from the crack, followed by foaming resin. After this, pure resin will flow from the crack.

• Stop pumping when the pure resin reaches the next packer.

• Move to the next packer and repeat the procedure.

• After injecting through a few of the packers, go back to the first one and re-inject with resin.

• After the resin injection, water can be re-injected into the ports to cure resin left behind.

• Let the resin cure thoroughly before removing packers. The resulting holes can be filled with hydraulic cement.

• When the injection is finished, clean all tools and equipment which have been in contact with the resin with Washing Agent Eco. This should be done within 30 minutes. Do not use solvents or other cleaning products since they give less positive results and can create hazardous situations.

• Products should be disposed off according to local legislation.

 

Technical Data / Properties

 

4. Reactivity

Appearance

HA Cut CFL AF: Dark brown liquid.

HA Cut Cat AF: Red liquid.

Consumption

Has to be estimated by the engineer or operator and depends on the size of the cracks and voids which need injecting, and on the expansion rate of the chosen resin.

Storage

HA Cut CFL AF is sensitive to moisture and should be stored in original containers in a dry area. Storage temperature must be between 5°C and 30°C. Once the packaging has been opened, the useful life of the material is greatly reduced and should be used as soon as possible.

Shelf life: 2 years.

Packaging

HA Cut CFL AF

5kg, 25kg or 200kg metal drums

1 Pallet:

180 x 5kg drum 24 x 25kg drum 4 x 200kg drum

HA Cut Cat AF

0.5 or 2.5L plastic bottle or 20kg metal drum

1 box = 8 x 0.5L

1 box = 5 x 2.5L

1 Pallet:

84 boxes with 0.5L bottles

40 boxes with 2.5L bottles

24 x 20kg metal drums

Accessories

To be ordered separately

• IP 1C – Manual hand pump.

• IP 1C – Compact electric airless diaphragm pump.

• IP 1C – Pro electric airless diaphragm pump.

• Packers and connectors. (Please consult the relevant data sheet).

Health and Safety

HA Cut CFL AF is classified as harmful.

HA Cut Cat AF is classified as irritant.

In case of spills and accidents, refer to the Material Safety Data Sheet of the products or when in doubt contact your local representative.

Always wear protective clothing, gloves and protective goggles when handling chemical products.

For full information, consult the relevant MSDS.

Hydro Active® Flex LV AF/Flex SLV AF

Next generation, phthalate free, closed cell, 1-component high performance hydrophobic, hydroactive, flexible polyurethane injection grouts for waterproofing leaking joints and cracks.

Product Description

In its uncured form, Hydro Active® Flex LV AF/Flex SLV AF (hereby referred to as HA Flex LV AF/Flex SLV AF) are white or yellow, non-flammable liquids without phthalate plasticisers. HA Flex LV AF/Flex SLV AF are next generation 1-component injection resins with improved waterproofing performance. When they come in contact with water, the grout expands and quickly (depending on temperature and the amount of accelerator HA Flex Cat AF used) cures to a tough, flexible, closed-cell polyurethane foam that is essentially unaffected by corrosive environments.

Field of Application

HA Flex LV AF /Flex SLV AF

• Designed for grouting joints or stopping water leaks in concrete structures, which are subject to settlement and movement.

• Used for protective waterproofing and gap filling around the brush tails of the TBM and for repairing the waterproof gasket.

• For stopping water leaks through joints between tunnel segments.

• For injection of the LDPE or HDPE membrane in tunnel constructions.

• For curtain injections behind tunnel segments.

HA Flex SLV AF (Specific fields of application)

Specifically developed for injection of fine and ultra fine crack and joints.

Joint and Crack Dimensions

• Always select a resin based on the crack or joint size to be injected.

• Small cracks will require low or ultra-low viscosity resins to ensure good crack penetration.

As a general recommendation, the following crack dimensions can be used:

HA Flex LV AF: Cracks > 0.5mm

HA Flex SLV AF: Cracks < 0.5mm

Product Advantages

• ADR free transport

• Next generation resin with improved waterproofing performance

• Improved cell structure of the cured compound resulting in better mechanical properties and durability

• Phthalate free resins, REACH compliant

• Improved performance at temperatures below 5°C, no crystallisation of HA Flex Cat AF

• HA Flex LV AF /Flex SLV AF form a flexible gasket or flexible plug in the joint or crack

• Non-flammable, solvent free

• Choice of different expansion rates

• User friendly: 1 – component produc

• Controllable reaction times: by using catalyst curing times can be reduced

• Cured compound is resistant to most organic solvents, mild acids, alkalis and micro- organisms (*)

 

Application

• Before commencing the injection, consult the Material Safety Data Sheet (MSDS) in order to be familiar with the materials at hand.

• Always shake the HA Flex Cat AF well before use.

1. Surface Preparation

• Remove surface contaminants and debris to establish the pattern of the crack or joint. Active leaking cracks larger than 3mm need to be sealed with an approved method.

• Drill holes of the correct diameter for the selected packer. Drill at an angle of 45°. Preferably the holes should be drilled staggered around the crack to insure good coverage of the crack in case it is not perpendicular to the concrete surface.

• The depth of the bore should be approximately half of the thickness of the concrete. As a rule of thumb the distance of the drill point from the crack is half the wall thickness.

• Distance between holes can vary by 15 to 90 cm, depending on the actual situation.

• Insert the correctly sized packer into the hole up to 2/3 of its length. Tighten with a wrench or spanner by turning clockwise until sufficient tension has been reached to keep the packer in place during injection.

• Flush the crack with water before injecting with resin. This will flush out dust, debris and prime the crack for the injection resin and improve penetration of the product into the crack. Water in the crack will activate the resin.

2. Resin and Equipment Preparation

• Prepare the resin with the predetermined amount of catalyst. Shake HA Flex Cat AF well before use. No reaction with the resin will occur until the resin comes into contact with water.

• Do not prepare more resin than can be injected within 4 hours after mixing HA Flex Cat AF in the resin. Avoid mixing full drums, it is recommended to batch mix smaller quantities in a separate pail or in the pump reservoir.

• Protect the resin from water, since this will trigger a reaction in the container used and might cause the resin to harden or foam prematurely within the injection equipment.

• It is highly recommended to use separate pumps for the water and the resin injection to prevent cross contamination and blockages.

• The pumps should be thoroughly primed with Washing Agent Eco to lubricate and dry the system before injection. We recommend the use of pneumatic or electric 1- component pumps.

3. Injection

• Start the injection at the first packer.

• Start injecting at the lowest pressure setting of the pump. Slowly increase the pressure until the resin begins to flow. Pressures may vary from 14 bars to 200 bars depending on the size of the crack, the thickness of the concrete and the general condition of the concrete.

• A little leakage of resin through the concrete or crack is useful in showing the extent of resin travel. Large leaks should be plugged with rags, wait for the resin to set, then inject again.

• During the injection water will first flow from the crack, followed by foaming resin. After this, pure resin will flow from the crack.

• Stop pumping when the pure resin reaches the next packer.

• Move to the next packer and repeat the procedure.

• After injecting through a few of the packers, go back to the first one and re-inject with resin.

• After the resin injection, water can be re-injected into the ports to cure resin left behind.

• Let the resin cure thoroughly before removing packers. The resulting holes can be filled with hydraulic cement.

• When the injection is finished, clean all tools and equipment which have been in contact with the resin with Washing Agent Eco. This should be done within 30 minutes. Never leave the pump filled with resin overnight or for periods beyond 1 shift. Do not use solvents or other cleaning products since they give less positive results and can create hazardous situations.

• Products should be disposed off according to local legislation.

• Refer to Material Safety Data Sheet (MSDS) for general recommendations. In case of spills and accidents, refer to the MSDS of the products or when in doubt contact your local GCP representative. Always wear appropriate protective gear for the job at hand according to local guidelines and regulations. We recommend that gloves and protective goggles are worn when handling chemical products. See MSDS for further recommendations.

4. Reactivity

 

Technical Data / Properties

 

Appearance

HA Flex LV AF: Yellow liquid

HA Flex SLV AF: Yellow liquid

HA Flex Cat AF: Grey transparent liquid

 

Consumption

Has to be estimated by the engineer or operator and depends on width and depth of the cracks and voids which need to be injected, and on the expansion rate of the chosen resin.

 

Packaging

HA Flex LV AF /Flex SLV AF

5kg, 25kg or 200kg metal drums

1 Pallet: 180 x 5kg drum

24 x 25kg drum

4 x 200kg drum

 

HA Flex Cat AF

0.25 or 1L plastic bottle or 20kg metal drum

1 box = 15 x 0.25L

1 box = 16 x 1L

1 Pallet: 84 boxes with 0.25L bottles

24 boxes with 1L bottles

24 x 20kg metal drums

 

Storage

HA Flex LV AF/Flex SLV AF are sensitive to moisture and should be stored in original containers in a dry area. Storage temperature must be between 5°C and 30°C. Once the packaging has been opened, the useful life of the material is greatly reduced and should be used as soon as possible.

Shelf life: 2 years.

Accessories

To be ordered separately

• IP 1C – Manual hand pump.

• IP 1C – Compact electric airless diaphragm pump.

• IP 1C – Pro electric airless diaphragm pump.

• Packers and connectors. (Please consult the relevant data sheet).

Health and Safety

HA Flex LV AF/Flex SLV AF resins are classified as harmful.

HA Flex Cat AF is classified as irritant.

In case of spills and accidents, refer to the Material Safety Data Sheet of the products or when in doubt contact your local GCP representative. Always wear protective clothing, gloves and protective goggles when handling chemical products. For full information, consult the relevant MSDS.

Hydro Active® Safefoam NF

Environmentally friendly, phthalate free, low viscosity hydrophilic polyurethane injection resin designed for moving non-structural cracks. Hydro Active Safefoam NF can be used as a 2-component 1:1 ratio system with water as second component

Product Description

Hydro Active® Safefoam NF (hereby referred to as HA Safefoam NF) is a single component, phthalate free, low viscosity, hydrophilic, polyurethane resin. After curing HA Safefoam NF forms an inert, flexible, close cell foam with very good tensile and adhesion properties. HA Safefoam NF can be used as a 2-component system with a 1:1 ratio water for injection into dry cracks.

 

Field of Application

• For sealing dry, moving, non-structural cracks as a 2-component system with a 1:1 ratio with water.

• For sealing moist, moving non-structural cracks as a 1-component system.

• For sealing water leaks between the joints of concrete tunnel segments.

• For curtain injections behind tunnel segments.

• For sealing moving, leaking cracks.

• Filling of honeycombs below ground water level.

• For waterproofing man and non-man accessible sewer pipes.

• For expansion joints or annular joints in combination with oil-free dry oakum or open cell foams.

Product Advantages

• ADR free transport

• Phthalate free resin, REACH compliant

• Non-flammable

• High bond and tensile strength

• Withstands thermal movement, wet-dry cycles, freezethaw cycles and crack movement without degradation

• Good all-round chemical resistance (*) (*) For chemical resistances please contact your GCP representative.

Application

HA Safefoam NF can be used as a 1-component system for injection into moist conditions or as a 2-component system with a 1:1 ratio with water for injection in dry conditions.

Before starting the injection, consult the Technical Data Sheets and Material Safety Data Sheet (MSDS) in order to be familiar with the materials at hand.

Injection

• Drill holes of the correct diameter for the selected packer. Drill at an angle of 45°.

• Preferably the holes should be drilled staggered around the crack to insure good coverage of the crack in case it is not perpendicular to the concrete surface. The depth of the bore should be approximately half of the thickness of the concrete. As a rule of thumb the distance of the drill point from the crack is half the wall thickness.

• Distance between holes can vary by 15 to 90cm, depending on the actual situation.

• Insert the correctly sized packer into the hole up to 2/3 of its length.

• Tighten with a wrench or spanner by turning clockwise until sufficient tension has been reached to keep the packer in place during injection.

• Start the injection at the first packer. Start injecting at the lowest pressure setting of the pump. Slowly increase the pressure until the resin begins to flow. Pressures may vary from 4 bars to 200 bars depending on the size of the crack, the thickness of the concrete and the general condition of the concrete. A little leakage of resin through the concrete or crack is useful in showing the extent of resin travel. Large leaks should be plugged with rags, wait for the resin to set, then inject again.

• Stop pumping when the pure resin reaches the next packer. Move to the next packer and repeat the procedure. After injecting through a few of the packers, go back to the first one and re-inject with resin. Let the resin cure thoroughly before removing packers. The resulting holes can be filled with hydraulic cement.

• When the injection is finished, clean all tools and equipment, which have been in contact with the resin with HA Washing Agent Eco. This should be done immediately. Do not use solvents or other cleaning products since they give less positive results and can create hazardous situations.

Technical Data / Properties

• Products should be disposed off according to local legislation. Refer to MSDS for general recommendations.

• In case of spills and accidents, refer to the MSDS of the products or when in doubt contact your local Grace representative.

• Always wear appropriate protective gear for the job at hand according to local guidelines and regulations. We recommend that gloves and protective goggles should be worn when handling chemical products. See MSDS for further recommendations.

Appearance

HA Safefoam NF: Pale yellow liquid.

Consumption

Has to be estimated by the engineer or operator and depends on width and depth of the cracks and voids which need to be injected.

Packaging

HA Safefoam NF

25kg metal drum

1 pallet: 24 drums

Storage

HA Safefoam NF is moisture sensitive.

HA Safefoam NF should be stored in a dry and frost free area, free from ground.

Storage temperature must be between 5°C and 30°C.

Once the packaging has been opened, the useful life of the material is greatly reduced and should be used as soon as possible. Shelf life: 2 years.

Accessories

To be purchased separately

• IP 1C – Manual hand pump.

• IP 1C – Compact electrical airless diaphragm pump.

• IP 1C – Pro electrical airless diaphragm pump.

• IP 2C – Gel pneumatic twin piston pump.

• Packers and connectors.

(See relevant data sheets).

Health and Safety

HA Safefoam NF is classified as harmful.

All persons in contact with the materials should wear the appropriate protective clothing and gloves. Spills should be washed immediately with abundant quantities of clean water.

For full information, consult the relevant MSDS.

 

HA Cut AF + HA Cut Cat SXF – behavior injected in Ice at -30°C

Scope

To check the reaction properties and exothermic effects of HA Cut AF+ HA Cut Cat SXF AF on ice and frozen soils a mixture of the resin is reacted in ice samples the reacted

Sample preparation: 4 Samples prepared

2x Approx. 800 ml of salt water (containing 3,5% NaCl) is frozen at -30°C

2x A mixture of 1500 g sand + 300 ml salt water is frozen at -30°C

In the middle of the samples a cylindrical hole is drilled with a 13mm and 24mm diameter and a 6 to 7 cm depth.

Volume of the hole in sample 1/3: approx. 10ml, volume of the hole in sample 2/4: approx. 30 ml

 

Sample 1 & sample 3 prior to injection

Test procedure

– In the samples with a 13mm diameter hole 5 ml of precatalyzed resin (HA Cut AF + 10% HA Cut Cat SXF AF is injected simultaneously with 0,75 ml water.

– The resin + water is mixed for approx. 10” and left to react.

– The foaming is monitored

– After foaming the excess foam is removed and the properties of the drilled cylinder examined to check the foam quality, and to check whether any signs of melting, deformation or cracking has occurred to the frozen material.

Left: climate chamber at -30°C

Middle: sample 2 is injected with 10 ml catalyzed resin+ 1,5 ml water, and then mixed

Right: sample 2 during foaming/while reacting

Test results

Left to right: sample 2, 3 &4 after foaming

Sample examination

Directly after the foaming, the excess foam on top of the sample is removed, the integrity of the sample and the diameter of the opening is checked, to know whether there was any sings of melting, or physical movement of the ice / soil around the injected foam mass.

Left& middle: sample 4 after partial removal of the foam.

Right: the diameter of the samples does not change during the test (photo: sample 2)

– The foams are relatively dense.

– None of the samples shows signs of deformation or melting.

– The aspect and size of the injected holes is not affected by the injection of the resin.

Conclusion

The exothermic reaction of free foam HA Cut AF + HA Cut SXF AF does not thaw the surrounding ice or frozen soil.

The cold temperatures slow down the reaction of the resin with water, the resin foams to form a good quality foam (but with lower foam factor compared to free foam in ambient temperature conditions)

CROSS TUNNEL PROJECT

INFLUENCE OF STORAGE AT -30°C ON REACTED RESINS

PROJECT

Cross tunnel between 2 metro line at a depth of 30 meter.

Initially a grout fan ( arch ) will be made whereafter they’ll need to apply ground freezing.

SAMPLES

Cured samples of HA CUT AF and HA SOIL AF, pure and injected in sand. Half of the samples are stored at 20°C and the other half are stored for 4.5 days at -30°C, microscopic pictures will be taken before and after.

SAMPLES

HA CUT AF pure before / after 4.5 days storage at -30°C

HA SOIL AF pure before and after 4.5 days storage at -30°C

HA CUT AF injected in sand before / after 4.5 days storage at -30°C

HA SOIL AF injected in sand before and after 4.5 days storage at -30°C

RESULTS

CONCLUSION

Microscopic observation shows that the structure of the pure-resin-samples and resininjected-in-sand-samples does not change after 4.5 days storage at -30°C. This applies both to HA CUT AF and HA SOIL AF.

Compressive strength measurement does not show any detrimental effect of storage at -30°C during 4.5 days.

Price Match Promise!

Guarantee Lower by 10% • Quality will not be compromise

Show us Quotation you received.
We will match the Price by 10% Lower.
Terms and Conditions Apply.

FREE on-site check!

100% Free | No Hidden Costs

Free On-Site Inspection and Troubleshooting.

WhatsApp / Call +65 8809 5279 for Inquiries

Protect your home and office with our Waterproofing Solutions.

De Neef®

Gelacryl acrylate injection resins

Gelacryl resins

  • Poly-acrylate resins
  • Gelacryl
  • Gelacryl SR
  • Gelacryl Superflex
  • Special systems / resins
  • CementGel W
  • AR systems for wet-dry applications
  • GASFAR for open joints

Poly-acrylate resins

  • 2-component systems

Comp 1
(Water)
Gelacryl Accelerator (TE300)

Comp 2
Water, use only tap water Initiator (SP200)

  • 2-component pump IP 2C-Gel
  • NON CORROSIVE

 

GELACRYL

  • 2-component
  • Water soluble
  • Gel
  • No strength
  • Flexible
  • Very low viscosity
  • No expansion
  • No pressure
  • Very good penetration
  • Short injection distance
  • Very small cracks (0,05 mm)
  • Light and UV sensitive

1-comp PU

  • 1-component
  • Water reactive
  • Foam
  • High strength
  • Flexible or hard
  • Low to medium viscosity
  • Expansion
  • Pressure
  • Very good penetration
  • Short to long injection dinstance
  • Small to large cracks
  • Moisture sensitive

Gel needs to remain moist at all times => shrink of the gel

Can be countered by using AR systems

GELACRYL V 1-comp PU

REACTION PROFILE

 

60 % of injections = screen injection in soil behind the structure.

  • Well suited for masonry: no pressure build-up
  • Gel remains moist and flexible due to soil humidity.

 

40 % of injections = Injection of screen between layers of the structure

  • => Between concrete pours
  • => Filling voids between walls
  • => PVC tunnel liner with injection ports

 

Crack injection in concrete and massonry.

  • Very efficient for small cracks < 0.5 mm
  • In concrete this is a CE application : Gelacryl Superflex AR
  • Optimum is injection through the crack so that the Gelacryl
  • Forms a screen between structure and soil

Gelacryl crack injection

 

PRINCIPAL OF INJECTION

  • Multiple layer construction
  • Screen needs to be on the outside behind:
  • Isolation layer
  • Existing membrane
  • Prevent filling of void between layers
  • Use specialy adapted packers with elongation tubes.
  • Packers which seals the drill hole at the back to
  • prevent resin from coming back.

 

PRINCIPAL OF INJECTION

  • Hollow brick walls
  • Consumption can be high due to the voids in the bricks.
  • Fill up with cementgrout before injection of Gelacryl screen.
  • Injection under floor slabs
  • Use packers where the rubber seal close the drill hole at the bottom
  • This keeps the hole open to be filled with cement or epoxy after the injection
  • Make sure to maintain the structural integrity of the slab

 

Gelacryl resins overview

  • Low viscosity : Excellent penetration
  • Elongation / elasticity : Depends on application
  • Post expansion : Extra waterproofing due to build up of pressure against structure’s surface
  • Adhesion : Extra waterproofing due to adhesion of gel against the structure

GELACRYL / GELACRYL SUPERFLEX APPLICATIONS

  • Screen injections behind structure for waterproofing
  • Screen injections behind masonry structures
  • Soil stabilisation (= coagulation)
  • Screen injections behind tunnel segments
  • Sealing tunnel liners (Superflex)
  • Moving cracks (elongation)
  • Waterproofing expansion joints
  • Sealing capillaries with small movements

Gelacryl SR soil injections

RENOVATION PROJECT BRUSSELS

  • Soil injection with Gelacryl SR
  • Existing slab needs to be lowered 50 cm
  • High ground water level
  • Water needs to be stopped before excavation
  • Installation of a grid with plastic strainer pipes
  • Injection with Gelacryl SR, 5’ geltime
  • Build up of waterproof soil encasement.
  • Core drills showed little water

Gelacryl resins sewer injections

GELACRYL SR APPLICATIONS

  • Automated sewer rehabilitation
  • Soil stabilisation (coagulation)
  • Cracks in sewers
  • Sewer masonry

Gelacryl SR is more tolerant to dilution by infiltrating water but gives a stiffer gel which can not cope very well with movements of the structure.

 

Gelacryl resins sewer injections

View of inflatable packer showing injection hole

 

Gelacryl resins sewer injections

View of injected joint after packer is passed through

 

Gelacryl resins sewer injections

Typical still from sewer inspection showing failed joint

 

Gelacryl resins sewer injections

Close up of injected joint

 

Gelacryl resins sewer injections

Injected sand packet behind the joint (Injected and filled joint)

 

Gelacryl resin preparation

COMP 1

Gelacryl Resin
Water (in case of Gelacryl SR)
Accelerator (TE 300)

COMP 2

Water or Gelacryl AR2
Initiator (SP200)

  • Gelacryl / Gelacryl Superflex no water added to component 1
  • Plastic containers
  • Stainless or plastic mixer
  • Accurate dosing => measuring cups for TE 300  complete packaging units for SP200
  • Shield resin from initiatiors
  • Direct UV-light
  • No contact with iron> faster gel
  • No contact with other oxidizing agents

Equipment

IP 2C-Gel = pneumatic pump

  • 2 pistons 1:1, powered by 1 airmotor
  • Separate flushing pump
  • Stainless Steel construction
  • Pressure up to 200 bar
  • Flowrate 14 l / min
  • Durable, easy cleaning
  • Low maintenance

Injection head

  • 2-component
  • Separate flushing system
  • Integrated true static mixer
  • New compact design
  • Easy to use and manipulate
  • Improved design of the non-return valves
  • Suitable for all Gelacryl system and CementGel W

General site inspection and preparation

Site inspection

  • Big water leaks
  • High flow/pressure : Best option = inject 1-component polyurethane
  • Contamination:
  • High pH : Speeds up gel reaction
  • Low pH : Slows down gel reaction
  • Iron : Speeds up gel reaction
  • Chlorine : Slows down gel reaction (potable water / De-icing salts)
  • Chemicals : Cured gel properties
  • Analytical kits available (Tech Service)
  • Cured gel : Good chemical resistance

General site inspection and preparation

Prepare the substrate

  • Remove all dirt from the surface
  • Check the condition of the structure
  • Check the coherence of any masonry structure
  • Injection = pression

Drill pattern

Drilling of injection holes

  • Build up of screen

Packers

Packer installation

  • Use suitable packer : hammered packer or screwed packer
  • Thighten well to prevent packer from blowing out of the wall.

 

Injection

Flushing with water

  • Flush out dirt and dust from the drill holes
  • Eliminate blind holes
  • Determine distance between drill holes
  • Determine gel time
  • Use flushing pump

Resin preparation

  • Select gel time according to ambient temperature => start with slightly slow gel time
  • Prepare components according to TDS formulations (Gel times 1 – 3 minutes)
  • Use tap water for preparation
  • Mix well
  • Accurate dosing
  • Test gel time
  • Never switch containers
  • Never add pure SP200 to TE300 or component 1

Resin preparation

  • For optimum performance, there needs to be a balance between TE300 and SP200 / SP200RI
  • SP200 / SP200RI determine the start of the gel reaction
  • SP200RI is a variant with added anti-corrosion products
  • TE300 determines the curing of the gel once the gel reaction has taken place

Resin preparation

  • Both influence the gel reaction and quality of the cured gel
  • Too little SP200 / SP200RI
  • The reaction starts to slow
  • Resin is washed away
  • Reaction does not start at all
  • Too much SP200/SP200RI
  • The gel starts very quickly
  • Bad penetration
  • Blockage of the pump and mixing head
  • Gel time tables
  • Give an indication of optimum mixing ratios for setting gel times at given temperatures
  • Assure sufficient TE300 is in the mix for the given temperature in application
  • Not necessarily for the environment where the gel is mixed
  • For good post cure
  • To prevent fast and hot reactions
  • As general rule for setting times on site
  • Underdose each component
  • Temperature is a big influence.
  • It is easier to add some TE300 / SP200 / SP200RI than to try and save a formulation which is too fast.
  • Caution in the use of KF500
  • The natural tought would be to take a slow gel and slow down further.
  • This should not be done.
  • Take a gel time formulation of 1 minute at the given temperature from the gel time tables
  • Add KF500 until the correct gel time is obtained
  • Trial and error with frequent cup tests
  • KF500 blocks the initiation of the gel reaction
  • If too slow a gel is used at the start, the cured gel will be weak in consistency due to lack of TE300.

 

Resin preparation

Use of KF500

For certain applications very long gel times are needed

  • Curtain grouting in low permeability soils
  • Soil grouting in low permeability soils
  • Soil grouting at ultra low pressures

With standard components TE300 / SP200 / SP200RI

  • Maximum gel times are around 20 minutes
  • Slower gel time impare gel quality

This can be countered by adding KF500 to the B-side  (water or Gelacryl AR2)

Preparation of IP 2C-Gel before the injection

  • Check oil in piston carters
  • Connect compressed air line
  • Place 3 buckets of water under the 3 aspiration hose
  • Set air pressure at 2 bars and start pump
  • Pump against closed valves.
  • When pump stalls => check for leakage: injection hoses and injection head
  • Open the injection head and control the 1:1 ratio, the level in the buckets must lower simultanesly
  • If any doubt on the 1:1 ratio, repeat the control without the injection head attached to the injection hoses.
  • Pump the water in 2 buckets with the same volume.
  • Buckets must be filled equally.
  • Never start pumping when the 1:1 ratio is not correct

Test the gel and the pump (mixing ratio)

  • Empty product pumps from water
  • Fill pump with resin against closed valves
  • Pump for resin for 1 minute to flush product hoses
  • Flush head
  • Inject for 30 seconds in bucket and check:
  • Gel time
  • Gel consistency
  • Too weak = too much B-component
  • Too hard = too much A-component
  • Start at first packer
  • Start injection with lowest possible pressure
  • Increase pressure until resin begins to flow
  • Inject sufficient resin to build up the screen
  • Inject until resin flows out of the next hole
  • Stop pumping when resin reaches next packer
  • Close or insert packer in next hole and repeat procedure

  • Check gel time and gel quality every 30 minutes
  • Flush head with water during intervals longer than geltime => Flush 2 strokes of flushing pump when still on the packer => Keeps head clean and packer open
  • Repeat 2-3 times to build up screen

Removing packer

  • Wait until all resin is reacted.
  • Remove packer according to standard procedure.
  • Close drill hole with fast setting cement.
  • Overflowing resin is easily removed.

Clean the pump

  • Empty the pump
  • Clean and flush with clear water
  • Keep all buckets or containers separate
  • In case of using Gelacryl AR2, add some dish washing liquid to Bcomponent side
  • Check the seals on a regular basis