Expanded clay

Expanded clay is chemically neutral, reliable heater. In a literal translation from Greek "expanded clay" is translated into Russian as "the burned clay" and represents fragile, porous material of gray color which is formed at the accelerated clay roasting. Production of expanded clay does not demand any chemical catalysts. Expanded clay, on the appearance and structure, is most similar to gravel, and represents granules of rounded shape of various sizes. Because of it expanded clay call ceramsite gravel that, in principle same.