Permeable bricks use cement and special grade aggregates as the main raw materials. They are mixed with appropriate amounts of reinforcing agents, mineral admixtures and chemical admixtures, mixed and mixed, and formed by pressurization, vibration pressure or other molding processes. Fired. Appearances can be covered (material) or non-covered (material), natural or colorful. According to the shape, it is divided into ordinary concrete permeable bricks and interlocking concrete permeable bricks.
The key of permeable brick selection:
1. Pervious bricks are mainly used for paving roads and ground works such as sidewalks or light traffic lanes. They can also be used in quarters, yards, parking lots, shops, neighborhoods, squares, waterside slopes, roads in parks and flats, airports. And pavement pavement.
2. Determine the water permeability coefficient of water-permeable pavement bricks based on the rainfall and precipitation intensity in the application area. Considering that during use, the permeable open space of permeable pavement bricks will be blocked by dust, dirt, or debris, which affects its permeable ability. Therefore, when determining the planned value of permeable ability of pavement tiles, it is advisable to take a pavement tile permeability coefficient of 30 ～ 50%, in order to ensure that during the service life of permeable bricks, it can meet the requirements of pavement permeability planning.
3. Determine the strength of the water-permeable pavement brick according to the application requirements.
4. For open permeable subgrades that require permeable bricks, the structure and thickness of the subgrade should be changed accordingly with the softness and hardness of the subgrade and the place where it is used. Plan according to application requirements. Thicker sidewalks are 100-150mm thick, light roads such as bicycles and motorcycles are 150-200mm thick, light-duty car lanes and parking lots are 230-300 mm thick.