India
For improving compressive and tensile strength of cement as addition of only 3% of Amorphous Silica in their final grinding can help them to improve the strength.
In cement products ,such as in manufacturing precast cement pipes and blocks as well as various other cement products ,when only small percentage of Amorphous Silica is mixed it can reduce the use of cement equivalent to nearly four times the material added which can bring in substantial economy and added value such as fire proof,light weight and better smooth finish.
Perlite is not a trade name but a generic term for naturally occurring siliceous volcanic rock. The distinguishing feature, which sets perlite apart from other volcanic glasses, is that when heated to a suitable point in its softening range.
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