Archives: April 2018

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26 April 2018 - 16:18, by , in Waterproofing, Comments off
DEFECTS DURING SERVICE LIFE Leakage through walls and slabs can lead to either architectural or structural defects, depending on the extent of leak. Some of the common defects arising from such leaks are as given in Fig 8.2. Detailed investigation will help in ascertaining the cause or causes of the problem. The repairs of such...
26 April 2018 - 16:12, by , in Waterproofing, Comments off
PROTECTION The Contractor must ensure that after completion, the area is cordoned off until a protective covering or screed has been laid. He must be notified of any damage and given time to carry out necessary repairs before protective covering is applied. The Contractor should ensure that work is carried out under controlled conditions and...
26 April 2018 - 16:07, by , in Waterproofing, Comments off
PLANNING The applicator should plan the application sequence before commencing works to avoid movement on freshly applied material and to ensure that the pot life of waterproofing material does not expire on site. Various factors influence the application: Size of team Tools Size of mixes Detailing Location of construction joints Curing time of material TOOLS...
26 April 2018 - 15:50, by , in Waterproofing, Comments off
GENERAL The Waterproofing Specialist must have his shop drawings approved for construction by the Designer. A meeting should be called in the early stages of construction by the Contractor to ensure that all involved parties understand the sequence of work. In planning the sequence of work, adequate time should be allowed for the waterproofing membrane...
26 April 2018 - 15:48, by , in Waterproofing, Comments off
DELIVERY All waterproofing products delivered to site should include the following information: general description of specified waterproofing product name of manufacturer/ supplier/ agent areas of application technical values for the specified product and related reference to any standards like SS, BS, ASTM or DIN shelf life and batch reference Products should be sealed and delivered...
26 April 2018 - 15:39, by , in Waterproofing, Comments off
GENERAL Following the design of the wet area by the Designer, the Contractor will propose a suitable waterproofing system. Selection should be based on life-time cost-performance. This should include not only the initial performance and cost of the waterproofing system, but also the cost of replacing a waterproofing system failing prematurely and other costs associated...
26 April 2018 - 14:58, by , in Waterproofing, Comments off
GENERAL The Designer should refer to applicable local and international codes, standards and specifications when designing wet areas to be watertight. The drawings and specifications should be prepared in sufficient detail by the Designer to provide proper guidance to the Waterproofing Specialist and other trades involved in the execution of work in wet areas. It...
26 April 2018 - 10:45, by , in Roofing, Waterproofing, Comments off
BACKGROUND Most roofs in Singapore are constructed using reinforced concrete which is known to have pores or capillary tracts. Depending on the designed strength, density and installation techniques, the number of pores can vary. These pores are interconnected within the concrete and water will penetrate through such capillary tracts aided by osmotic effect. Concrete is...
17 April 2018 - 15:50, by , in Epoxy, Epoxy Grouting, Grouting, PU Grouting, PU Injection, Comments off
The Pressure Injection System The Pressure Injection System can be used for injecting cracks, cold joints, expansion joints and for soil stabilization. The system can be used to stop gushing water, to seal minorseepage, to regain structural integrity and to waterproof and strengthen almost any concrete ormasonry structure from the positive or negative side, below grade,...
17 April 2018 - 15:37, by , in Epoxy, Epoxy Grouting, Comments off
Preface There are many formulations and varieties of epoxy appropriate for a wide range of purposes; almost all are strongly adhesive, electrically insulating, and heat resis- tant. When working with an industrial epoxy of any kind, you will need to take pre- cautions. This e-book addresses some of the hazards and safety precautions of working with industrial epoxy resins. ...