Perforated brick

 e porous bricks produced in my country can be roughly divided into two categories in use: one is load-bearing bricks with small holes; the other is non-load-bearing bricks for thermal insulation filled walls, with large holes. According to "Sintered porous brick-GB 13544-2000" and "Sintered hollow brick and hollow block-GB 13545-2003", the first type of brick with a porosity greater than or equal to 25% for load-bearing is called porous brick, and the second type Bricks with a porosity not less than those used for non-load-bearing are called hollow bricks. [1] Perforated bricks are divided into P-type bricks and M-type bricks, and the difference between P-type bricks and M-type bricks is mainly the external dimensions. The porous bricks on the market mainly refer to concrete porous bricks and sintered porous bricks. Concrete porous brick is a kind of concrete brick with multiple rows of small holes, which is made of cement as the cementing material, broken construction waste and industrial slag as the main aggregate, mixed with water, formed and cured, and has appropriate bricks and porosity. ≥30%, the paving surface is semi-blind, which belongs to non-clay and non-sintered block material; while the sintered porous brick is mainly made of clay, shale, and fly ash as the main raw materials, and is formed and baked into porous Brick, the hole rate is ≥15%, the hole size is small and the number is large, and the hole distribution area is large and uniform. It is mainly suitable for load-bearing wall materials.