Hydrophilic Waterstop

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Hydrophilic Waterstop System

 

Hydrophilic Butyl Waterstop Seal

Hydrophilic Butyl Waterstop Seal is a unique sealing compound which expands in a controlled fashion when exposed to moisture, forming a compression seal in concrete joints. It is ideal for use in horizontal and vertical construction joints for cast in-situ concrete structures.

It is manufactured utilising a specialised mixing process which encapsulates hydrophilic materials into a Butyl base creating a controlled, moisture-activated seal. The product has the structural integrity and the long term durability features of Butyl, as well as the ability to expand to create a SELF-HEALING JOINT WATERSTOP SEAL.

Unlike many of the traditional clay-based products, it is being hydrophilic polymer based, will not expand to a point that the hydration process itself leads to the possible “disintegration” of the waterstop due to its expansion control system. This is an important issue when the engineers are looking for a seal in vertical construction joints where the joint can open due to excessive shrinkage in the concrete. In-field experience has proven that products which continually expand, may lose their structural integrity and begin to wash away from the joint when subject to a constant flow of water or from high water pressure.

It does not expand prematurely from the wet weather due to its unique expansion control system which also means it doesn’t expand from the water in the fresh concrete when poured against it, which helps minimize any pre-expansion if the joint becomes ponded with water. It is very unique in that it can be installed by embedding it into wet concrete of the first pour as the concrete upon drying bonds very well to the Butyl Seal.

It has been tested to withstand a 60 metre (6.0 Bar) head of water pressure in potable and salt water conditions.

Due to its Butyl properties, it bonds to both concrete surfaces (1st and 2nd pour) creating a gasket seal first, when used in conjunction with CJ-100 Adhesive. The wet concrete from the 2nd pour bonds tenaciously to it.

It complies to NSF/ANSI Standard 61 Drinking Water System Components – Health Effects, ensuring it is safe for use in drinking water applications. Therefore, it is suitable to use in various potable water retaining structures like water tanks, swimming pools and reservoirs.

Advantages

  • Conforms easily for installation onto rough or smooth concrete surfaces.
  • Excellent adhesion to concrete with CJ-100 Adhesive.
  • Allows concrete to gain strength before expansion due to built-in expansion control system.
  • For use in horizontal and vertical construction joints.
  • Long term durability & integrity.
  • Can be bedded into the wet concrete of the first pour for installation.
  • No compaction or displacement problems.
  • Unaffected by repeated wet and dry cycles.
  • Has the ability to bond to both concrete surfaces.
  • No on-site welding required.
  • Can withstand 60 metres (6.0 Bar) of hydrostatic head pressure.
  • Ability to handle long-term exposure to the environment prior to the 2nd pour taking place.
  • Non-toxic and requires no special handling.
  • NSF Certified for use in potable water applications.
  • Very easy to handle and install.

 

Packaging & Dimensions

25mm x 19mm x 5m rolls (6 rolls per carton = 30 metres per carton)

CJ 100 Adhesive – 1 litre & 3.6 litres per tin
Note : Coverage Approximately 20 – 30 metres per 1 litre

 

Areas of Application

Water Retaining Structures

  • Water tanks
  • Reservoirs
  • Dams
  • Spillways
  • Sewage treatment plants
  • Water treatment plants
  • Swimming pools
  • Box culverts
  • Bund walls

Water Excluding Structures

  • Basements
  • Underground structures
  • Tunnels
  • Subways
  • Retaining walls
  • Pits
  • Manholes

Others

  • New to old concrete
  • Poured in-situ construction joints
  • Roof slabs
  • Suspended slabs
  • Above & below grade precast panels (check with Corkjoint & your Engineer)

Note : The products design and performance, its intended use, installation and final confirmation and approval for use,
must be provided by the project’s Design Engineer and Project Manager.

Notes

Due to expansive forces, it should be both detailed and installed with a minimum 50mm clear cover to the face of the concrete. Expansion rate can vary in salt and contaminated water. Increase cover when using light weight, low strength concrete. Not for use where excessive shrinkage of the concrete may occur at the joint faces. Do not stretch it during installation. Not for use in movement (expansion, isolation and contraction) joints.

Installation Procedures

It requires a minimum 50mm cover of concrete from the outside edge.

  1. Brush off any dust or debris from the surface where the it is to be applied. Brush a coat of CJ-100 Adhesive 30mm wide onto the concrete surface and one coat to the surface.
  2. Once both surfaces where the adhesive was applied are touch dry, with the use of your thumbs or heel of your hand, firmly press a continuous bead into position, making sure you achieve full contact with the adhesive on the concrete surface. Do not stretch it when applying it into position.
  3. Use a neat, firm butt join to join together and then knead the ends together to form a continuous uninterrupted gasket. This type of join is used for continuous placement and for any intersection joins.
  4. Check to see that it has totally adhered to the concrete surface. If the surface is rough or irregular, you may need to use a firmer hand pressure to make sure that it has full contact with the surface. There must be no visible gaps after installation.
  5. The protective paper layer cover on it can be removed any time prior to the second pour of concrete taking place.
  6. Placement of the second pour of concrete can be applied once the CJ-100 Adhesive has dried. Upon pouring, make sure the concrete is properly compacted and vibrated around it.
  7. If it has been exposed to water (moisture) prior to the second pour taking place, check for pre-expansion. If the product has pre-expanded, then remove that section and replace with a new length.
  8. For vertical construction joints and overhead applications, it may be necessary to also secure it with nails, placed approximately every 250mm apart. This is usually only required as extra security if you need to pour your concrete prior to the CJ-100 Adhesive drying completely.
  9. If it is going to be exposed to moisture or submerged in water longer than 5-7 days, then a coating of CJ-100 Expansion Delay Coating may need to be applied to all exposed areas.

Test Reports – Independent Laboratory

  • Exposure & Water Immersion Expansion in Potable Water
  • Exposure & Hydrostatic Head Pressure (cyclic wet & dry) in Potable Water
  • Water Immersion Expansion in Salt Water (5% NaCI)
  • Hydrostatic Head Pressure in Salt Water (5% NaCI)
  • National Sanitation Foundation (NSF) Certification for Potable Water Use

Note : The above test reports are available upon request.

 

Written Specification

Waterstops where shown on the drawings shall be controlled expansion waterstop as supplied. The waterstop is to have a built-in expansion control system to minimise any pre-expansion prior to the second pour taking place and be able to withstand up to 60 metres (6.0 Bar) hydrostatic head pressure resistance. The waterstop is to be placed in accordance with the manufacturer’s installation guidelines, and the Design Engineer’s specification.

 

Health And Safety Information

In confined spaces or in still air conditions, the use of a ventilation fan or suitable respirator should be used, and the advice and approval of the Site Safety Supervisor is essential. For further information or advice on health and safety precautions, safe handling, storage and correct disposal of products, please refer to the most recent product Safety Data Sheet (SDS), which is available upon request.

Hydrotite Hydrophilic Chloroprene Rubber Waterstop

Hydrotite is the brand name for a state of the art hydrophilic waterstop with unmatched durability and water sealing capacity. Hydrotite expands as it
absorbs water and fills up concrete joint gaps conforming to the gap variation, ensuring excellent sealing. Hydrotite is based on the technology of
hydrophilic, a material which expands in a controlled fashion by approximately eight times by volume in the presence of moisture to create a pressure seal within the joint, when properly installed. Hydrotite is capable of sealing heads of water up to 30 metres and is used extensively throughout the construction industry to seal horizontal and vertical construction joints for poured in-situ concrete.

Hydrotite consists of a unique combination of expanding hydrophilic materials and non-expanding chloroprene rubber, co-extruded together to form a single strip. The expanding section is blue with the non-expanding section being black. The co-extruded design means that the expansion is directed across the joint for maximum sealing performance. This expansion creates an effective compression seal within the joint, preventing the egress of water through it. Upon expansion, Hydrotite turns from a dark blue colour to a light blue colour, so that a visual inspection of the Hydrotite can be made and so the contractor can see if the Hydrotite has pre-expanded.

Contractors require an economical waterstop that is easy to install and needs to perform over a long period of time maintaining joint integrity. Recognised world-wide, Hydrotite has a proven track record as a high quality and cost-effective solution as a waterstop for water retaining or water excluding needs.

Hydrotite is treated with a delay coating to prevent it from absorbing water from the wet concrete of the second pour, and to also help stop any premature expansion should the joint become ponded with water, prior to the second pour being placed, and to stop any premature expansion taking place before curing of the concrete.

Hydrotite, as with any hydrophilic waterstop, will return to its original size if there is no more water or moisture present. Hydrotite will then re-expand when water or moisture is reintroduced to the joint. Some initial leakage may occur before Hydrotite re-expands fully. Repeated wet and dry cycling of this nature does not affect the functioning of Hydrotite.

 

Advantages

  • Easy to handle and install
  • Excellent adhesion to concrete surfaces
  • Outstanding physical properties
  • Profiles with self-adhesive backing allow for simple and fast installation processes
  • Co-extruded design means expansion is directed across the joint for maximum seal
  • Unaffected by repeated wet and dry cycles
  • No site welding is required for joining processes
  • Has a delay coating to help prevent premature expansion
  • Extra delay coating is available for very wet conditions, if required
  • Changes colour as a visual alert to let you know it has expanded
  • No need for special intersections, joining is by simple butt joins
  • Can be applied to rough surfaces using Leakmaster gun grade waterstop
  • Can be joined to traditional PVC waterstop
  • No compaction or displacement problems
  • Non-toxic and non-hazardous
  • No need for split forming

 

Area of Application

Hydrotite is to be used where watertight integrity is the prime issue. Typical applications where there is a need to achieve a water seal include: –

  • Sewerage Treatment Plants
  • Water Treatment Plants
  • Reservoirs
  • Water Tanks
  • Swimming Pools
  • Tunnels
  • Subway Stations
  • Basements
  • Pits
  • Pipe Penetrations

Note : The products design and performance, its intended use, installation and final confirmation and approval for use, must be provided by the project’s Design Engineer and Project Manager.

 

Profile Selection

Shown below is a guideline of the types of Hydrotite profiles that are available for use in construction joints in various projects.

Note : Contact us for application and product type verification. Joint details should be verified and approved by the Consulting Engineer who should satisfy himself of the suitability of the product for its intended use.

Notes

Due to expansive forces, Hydrotite should be both detailed and installed with a minimum 50mm clear cover to the face of the concrete. Expansion rate can vary in salt and contaminated water. Increase cover when using light weight, low strength concrete. Not for use where excessive shrinkage of the concrete may occur at the joint faces. Do not stretch the Hydrotite during installation. Not for use in movement (expansion, isolation and contraction) joints.

 

Chemical Resistance

The influence of pH values of concrete, grouting material and ground water upon the expansion of Hydrotite was tested using hydrophilic rubber as below. The specimen was immersed in each solution for seven days and the retention value of tensile strength and elongation were measured. Then, the specimen was removed from each solution and placed in tap water for seven days. The specimen was then compared with specimens that had been expanded in tap water only.

The retention value of both physical properties and expansion was compared with that of specimens tested in tap water. Hydrotite keeps the retention values 90% or more in all solutions listed in the table below. In the table, “O” indicates retention value 90% or more.

Leak Master

Leakmaster is a water swelling gun grade waterstop with excellent and unique physical properties. It can he used in places where the standard extruded profiles are not suitable in areas such as rough concrete surfaces or as a back-up to these profiles in complex junctions. (Please refer to separate Leakmaster brochure).

Written Specification

Hydrophilic expanding waterstops shall be placed at the joints in the concrete at the locations shown on the drawings in accordance with the requirement of this specification. Waterstops where shown on drawings shall be Hydrotite (State profile number required) Hydrophilic Waterstops as supplied by us.

The waterstop shall consist of a non-expansive black chloroprene rubber, co-extruded with a blue hydrophilic rubber, which is capable of swelling by approximately eight times by volume. The waterstop shall be treated with a delay coating to prevent premature expansion and be able to change colour upon expansion which acts as a visual alert that the waterstop has started to expand. The waterstop is to be installed strictly in accordance with the manufacturer’s recommendations.

Health And Safety Information

In confined spaces or in still air conditions, the use of a ventilation fan or suitable respirator should be used, and the advice and approval of the Site Safety Supervisor is essential. For further information or advice on health and safety precautions, safe handling, storage and correct disposal of products, please refer to the most recent product Safety Data Sheet (SDS), which is available upon request.

Hydrophilic Gun Grade Waterstop

It is a one component polyurethane water-swelling (hydrophilic waterstop) sealant with excellent and unique physical properties. It can be applied to places such as joints in concrete, in civil engineering construction and water services for seals where conventional seals cannot be applied easily. After hardening, it has excellent physical properties together with rubberlike elasticity and water sealing properties.

Advantages

Easy Application – As a moisture-cure one component type water-sealing. Standard caulking guns can be used as for conventional sealants.

Physical Properties – After hardening, it has better physical properties than those of conventional putty type sealants.

Water-swelling – Swelling up to 2 times (approximately) by Volume as a result of its water absorption ability.

Good Adherence – It adheres to various materials such as concrete, metals, glass, etc.

Areas of Application

  • Water sealing of joints in cast-in-situ concrete
  • Water sealing around steel posts/columns, king posts, that are cast into concrete
  • Water sealing around pipes for pipe penetrations through concrete
  • Box culverts & manholes joints
  • Form tie holes and form ties
  • Rough concrete surfaces of joints
  • Hydrostatic head pressure resistance of up to 2 bar (20metres)

Note : The products design and performance, its intended use, installation and final confirmation and approval for use, must be provided by the project’s Design Engineer and Project Manager.

 

Application Procedures

  1. Break the moisture-proof aluminium foil on the top of the cartridge, and remove the metal cover seamer from the bottom.
  2. Cut the nozzle diagonally at the required appropriate position to achieve desired amount.
  3. Set the cartridge to caulking gun.
  4. Apply continuously without a break to the location to be sealed.
  5. Applicaton diameter to be at a size suitable to prevent water egress.

 

Important Precautions

  1. Minimum cover to Leakmaster LV-Z installed application from any outside edge. Refer to Figure 1 below.
  2. Do not apply as an external or surface position like a traditional sealant. Product must be fully encased by concrete.
  3. Do not leave exposed to water for longer than 12 hours prior to second concrete pour being placed.
  4. Allow to cure (harden) prior to pouring next concrete pour.
  5. Use open cartridges within 24 hours after opening.
  6. Store in a cool dark and dry place.
  7. Shelf life of approximately 12 months from production date.

 

Written Specification

Where shown on the drawings, the hydrophilic gun grade waterstop sealant shall be as supplied. The Hydrophilic gun grade waterstop sealant is to be polyurethane based and able the be adhered on to concrete, steel, ceramic and/or plastic surfaces. It must have a minimum expansion capability of two times by volume (200%) and be able to withstand a minimum of 2.0 bar (20 meters) of hydrostatic head pressure resistance and proof of this must be provided by an independent laboratory test report. The product must be installed in accordance to the supplier’s installation guidelines and the Design Engineer’s specification.

 

Health And Safety Information

In confined spaces or in still air conditions, the use of a ventilation fan or suitable respirator should be used, and the advice and approval of the Site Safety Supervisor is essential. For further information or advice on health and safety precautions, safe handling, storage and correct disposal of products, please refer to the most recent product Safety Data Sheet (SDS), which is available upon request.

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