Non-metallic construction materials
Non-metallic construction materials, including dense aggregates, as well as porous natural fillers - inorganic granular bulk construction materials obtained from rocks, including by-products and waste from enrichment plants of mining and processing enterprises, used in construction without altering their chemical composition or phase state
Source: "GOST 25137-82* (CT SEV 5445-85). Non-metallic construction materials, dense gravel and sand from industrial waste, porous aggregates for concrete. Classification"
(introduced by the Decree of Gosstroy of the USSR dated December 31, 1981 No. 291)