There are also two types of water permeability of the side permeable type permeable bricks, that is, water penetrates the bottom of the permeable brick from the joints of the bricks (side), and then penetrates into the foundation; Infiltrate directly into the foundation. Generally, the first type of water permeability is used.
The structures of the permeable bricks on the side are all upper and lower composite types. The bottom layer is required to have a high water permeability coefficient and strength at the same time. The surface layer has the same abrasion resistance as the ordinary pavement bricks, but the water permeability coefficient is extremely small.
Generally, for fine aggregate concrete such as permeable concrete, the permeability coefficient and strength have a certain inverse relationship with each other. However, if the water permeability coefficient is to be kept constant, it can be improved by adding a special cementing agent to improve the bond strength of the aggregate interface, thereby improving the strength of the permeable concrete.
The biggest feature of the water-permeable permeable brick on the side is that it has good abrasion resistance and correspondingly poor water permeability.