Light weight concrete – or foamed concrete – is a versatile material which consists primarily of a cement based mortar mixed with at least 20% of volume air. The material is now being used in an ever increasing number of applications, ranging from one step house casting to low density void fills. Lightweight and free flowing, it is a material suitable for a wide range of purposes such as, but not limited to, panels and block production, floor and roof screeds, wall casting, complete house casting, sound barrier walls, floating homes, void infills, slope protection, outdoor furniture and many more applications. Not everyone knows that density and compressive strength can be controlled. In the light weight concrete this is done by introducing air through the proprietary foam process which enables one to control density and strength precisely. Strength is a relative term. Concrete mixes should be designed based on end use. High compressive strength is useful where deadload or abrasion are factors, but are unnecessary for roofs and non-structural partitions. All concrete is deficient in tensile and shear strengths, however these are supplemented through structural reinforcement. Compressive strength can be made up to 40 mpa, exceeding most structural requirements
A waterproofing membrane is a thin layer of material used to prevent water from contacting another material that it is placed over. Waterproofing membranes may be adhesive or simply laid on top of the material they are supposed to protect. Waterproofing membranes are made from many different materials and are commercially available in various sizes and thicknesses. Waterproofing membranes are used for many applications, such as covering concrete while it is being formed to prevent water from compromising the structural integrity of the concrete, or coated on products that are submerged under water where corrosion is a concern.
Care must be taken when waterproofing membranes are applied to a substrate. It is important to know what substrates do and do not work well with waterproofing membranes. It is also necessary to give consideration to the environment where the waterproofing membrane will be applied because some membranes are very sensitive to moisture during the application phase and will be ineffective if not applied under the proper conditions.
Polyurethane is made up of two components, base and reactor. Polyol acts as the base, while isocyanide is the reactor component. The combination of both these in a specific design ratio creates a liquid coating for waterproofing applications. Polyurethane is a rather popular choice due to its ease of installation. Unlike other waterproofing systems like sheet membranes and liquid applied membranes, this polyurethane application requires comparatively less skill and supervision. Application is fast and this type of treatment can be used for post construction applications as well. Waterproofing is an expensive business, still it is better to prevent leakages and take all precautions during construction stage itself.
Brickbat coba waterproofing is an effective way of providing waterproofing and insulation for thermal comfort for flat rcc roofs to prevent leakage of water. It is one of the oldest procedures of waterproofing, which consists of laying brickbats on the flat rcc roof and grouting the same with waterproofing compound with a slope to drain the surface water. Purpose of brick bat coba waterproofing.
Brickbat coba waterproofing is one of the most effective and oldest waterproofing methods which is widely used in the buildings to make the slabs waterproof.