The ecological environment function of permeable roads is mainly measured from three aspects. Guangzhou Wanxin Pipe Industry Co., Ltd., a professional manufacturer and seller of permeable bricks, respectively, will tell you the following.
1. Penetration ability
According to data calculations, the maximum rainfall intensity encountered by Beijing in the past 5 years is about 0.1 mm / s (mm / s), and the permeability coefficient of environmentally-friendly pavement permeable bricks is 1 mm / s, which can make rainwater quickly infiltrate to Under the cushion, there is no water accumulation on the road surface.
Generally, the thickness of the permeable brick is 60mm, the porosity is 20%, the thickness of the cushion is generally 150mm, and the porosity is 30%, which is equivalent to forming a 57mm deep invisible reservoir. In other words, even if the cushion is completely impermeable, there is no drainage, and there is no water accumulation on the 57mm road. It can be seen that the permeable road can fully meet the requirements of heavy rain infiltration.
2. Improve water quality
The permeable brick has the effect of filtering and filtering the infiltrating rainwater, and has a certain function of improving the water quality. According to the results of the test started by the Beijing Institute of Technology, the removal rate of COD (higher COD value indicates the heavier organic pollution in water) is 30.00%, SS (suspended matter) is 61.45%, TN (total nitrogen) is 7.4% , TP (total phosphorus) removal rate was 40.16%.
3. Improve local microclimate
Water-permeable pavements can change the temperature and humidity near the ground surface. Observation data show that in high temperature seasons, the surface temperature of permeable roads is 2 to 5 ° C lower than that of impervious roads; in dry seasons, the surface humidity of permeable roads is 1 to 3% higher than that of impervious roads. At the same time, the permeable function of water-permeable pavement can greatly reduce the damage of "dead" soil under water-impermeable pavement, which is beneficial to the growth of trees.
There are various excellent properties of permeable bricks, waiting for your excavation!