Building materials are a variety of materials used in construction projects. There are many types of building materials, which are roughly divided into:
(1) Inorganic materials, including metallic materials (including ferrous and non-ferrous materials) and non-metallic materials (such as natural stone, burned earth products, cement, concrete and silicate products).
(2) Organic materials, including plant materials, synthetic polymer materials (including plastics, coatings, adhesives) and asphalt materials.
(3) Composite materials, including asphalt concrete, polymer concrete, etc., generally composed of inorganic non-metallic materials and organic materials.