M. A. Waheed Chairman, Perma Construction Aids Pvt. Ltd. Mumbai
There are some compounds, which are used as aaditive in plastic concrete to make it less permeable to water. These compounds are known as integral waterproofing compounds. They are based on plasticising and air-entrainment or water repellence principles. These are used as a good waterproofing precautions when other factors such as good mix-design, proper mixing/placing, compacting/curing etc are taken care of. This subject of using integral waterproofing compounds requires an in depth discussion hence will not be taken up here. Similarly, there are many waterproofing techniques for vertical surfaces. These techniques used are also used for preserving heritage buildings by stopping/minimising the aging process of these buildings. This subject also will not be discussed here.
First of all let us review some of the old and conventional waterproofing systems and then we would discuss the modern waterproofing techniques.
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