Calcium silicate used as an anticaking agent in food preparation, including table salt and as an antacid. It is approved by the United Nations' FAO and WHO bodies as a safe food additive in a large variety of products. It has the E number reference E552. Calcium silicate is commonly used as a safe alternative to asbestos for high-temperature insulation materials. Industrial-grade piping and equipment insulation is often fabricated from calcium silicate. Its fabrication is a routine part of the curriculum for insulation apprentices. Calcium silicate competes in these realms against rockwool and proprietary insulation solids, such as perlite mixture and vermiculite
Building insulation temperature standard in China, most old residential and commercial buildings in China doesn’t have any thermal insulation, even in the area that suffer a severe weather which is hot in summer and cold in winter. And the insulation material that often used in the new buildings of China is Styrofoam, which has difficulties in installation and low effectiveness of thermal insulation. Another problem is that the Styrofoam is not fireproof material, it will be a hazard if this material is widely used. Unlike the United States and Australia, the government institutes haven’t established a common standard about thermal insulation. More