Both terracotta and ceramic permeable bricks are fired at high temperatures. However, the sintering temperature of clay bricks is 200 degrees Celsius lower than that of ceramic permeable bricks , so the bonding degree is weaker than that of ceramics.
Pervious brick 1. The maximum standard of the block is: 300mm in length, 300mm in width, and 140mm in thickness. The minimum standard is: 100mm in length, 100mm in width, and 45mm in thickness.
2. The original materials for permeable bricks can be porcelain, hard ceramics, high-quality concrete pellets, rubber particles, broken glass, etc. High-quality single-grain pellets can ensure that the permeable bricks have outstanding water permeability, fine powder, Muddy sand and needles will greatly affect the water permeability of the floor tiles, freeze-thaw resistance and service life.
3. Water absorption rate. The average water absorption rate of permeable bricks should not exceed 160kg / m3. (Note: Water absorption rate and water permeability are two different concepts. Excellent water permeable bricks do not need to be fixed on the ground to have high water absorption rate ).
4. Permeable bricks must have outstanding water permeability together with outstanding anti-slip function and decoration effect. The water permeability of the permeable floor depends on the water permeability of the brick body and the water permeability of the brick seam. It should also be considered in actual application. Air permeability, non-slip property and decoration effect.
5. Color persistence. High-quality floor tiles should have outstanding color retention. The pigment used is preferably an iron oxide inorganic pigment. Regarding light-colored concrete permeable bricks , when white cement has to be used as the cementing material, gray cement should be used as the base material and white cement as the surface layer composite pressure vibration molding process to maintain the outstanding color retention of the pavement tiles. Resistance, compressive strength, and prevent serious "white birch" phenomenon.
6, laying method, rectangular (Netherlands long) floor tiles generally have four weaving methods, different laying methods not only produce different decoration effects, but also greatly affect the mechanical function of the ground, on heavy-loaded ground, with the direction of traffic The 45-degree "herringbone" paving method has the best mechanical function. "I" and "flower basket" paving are generally only applicable to sidewalks and bicycle lanes.
.Clay brickBoth terracotta and ceramic permeable bricks are fired at high temperatures. However, the sintering temperature of terracotta bricks is 200 degrees Celsius lower than that of ceramic permeable bricks , so the bonding degree is weaker than that of ceramic permeable bricks , that is, the abrasion resistance is poor. Clay brick is a combination of fine clay powder, so it has a larger surface area. The pores are small and impermeable during firing. The soil has water absorption properties, but because it is impermeable and cannot be penetrated (only by transpiration), the water in the brick will Repeated destruction of the particle binding site. This is why some light-colored bricks (with a low degree of sintering) have peeling after passing through a winter ----- the ability to resist volume expansion when melting with ice water is weak.