Building materials are all kinds of materials used in building engineering. There are many kinds of building materials, which can be roughly divided into:
(1) Inorganic materials, including metallic materials (including ferrous metal materials and non-ferrous metal materials) and non-metallic materials (such as natural stone, clay-burning products, cement, concrete and silicate products, etc.). ).
(2) Organic materials, including plant materials, synthetic polymer materials (including plastics, paints and adhesives) and asphalt materials.
(3) Composite materials, including asphalt concrete and polymer concrete, are generally composed of inorganic nonmetallic materials and organic materials.
A saw is a tool used to cut wood or other things that need to be processed. It consists of a saw blade and a saw body composed of irregularly arranged serrations. Broadly speaking, it refers to a tool for separating objects by repeatedly moving multiple contact points arranged in a single row under great pressure. Common forms are woodworking saw, circular chain saw, band saw, wire saw and so on.