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 materials cannot satisfy people’s long-term need for thermal insulation.so, people began to search for substitutes which are more durable. In the 19th century, people are no longer satisfied with using natural materials for thermal insulation, they processed the organic materials and produced the first insulated panels. At the same time, more and more artificial materials start to emerge, a large range of artificial thermal insulation materials were developed, rock wool, fiberglass, foam glass, hollow bricks. Thermal insulation can be a significant role in the building, great demands of thermal comfort result in a large amount of energy consumed for full-heating