Concrete pavement tiles are made of cement and aggregate as the main raw materials, processed, vibrated and pressed or other molding processes. They are used for laying concrete pavements and ground projects in urban roads, sidewalks, urban squares, etc. blocks, boards, etc. The surface of concrete pavement tiles can be with or without surface layer (material); natural or colored. Including other product materials (such as floor materials) used to lay urban roads, sidewalks, and urban squares. When the side length/thickness of the pavement brick is lt; 5, the product is divided into five strength levels: Cc30, Cc35, Cc40, Cc50 and Cc60 according to its compressive strength; when the side length/thickness of the pavement brick is ≥ 5, the product is divided into five strength levels: The flexural strength is divided into four strength levels: Cf3.5, Cf4.0, Cf5.0 and Cf6.0. Color is natural or colored. It is used in sidewalks, roadways, park paths, parking lots, and places where the ground is subject to heavy stress, such as port container terminals, airport aprons, etc. According to the connection, they are divided into ordinary pavement bricks and interlocking pavement bricks. Among them, interlocking pavement bricks are divided into two-way interlocking pavement bricks and one-way interlocking pavement bricks. According to the surface shape of bricks, they are divided into those with surface layer (material) and without surface layer (material). The latter is also called full-body brick. ?