Once there is heavy rainfall, many major streets in Guangzhou are swollen. When it comes to the reason, most people attribute it to the small planned load of the drainage network. As everyone knows, hardening of the road surface is also one of the important reasons. At present, the hardening and laying of driveways and sidewalks in cities is becoming more and more common. Unfortunately, the problem of water permeability on pavements is ignored. In order to avoid the accumulation of water on the road, not to spoil the precipitation, and to supplement the groundwater, can the pavement be hardened and covered with permeable bricks? The reporter learned from the relevant departments on August 8 that this hope has been achieved. The "ceramic permeable brick" of general hardened bricks was successfully developed in Guangzhou. The appraisal opinion of the appraisal committee arranged by the China Building Materials Industry Association was: "The product functions have reached the international advanced level and filled the gap in this product in China."
Relevant experts analyzed that in recent years, most cities have chosen to choose impermeable pavements such as beautiful stone plates or concrete color tiles, including sidewalks, bicycle lanes, outdoor parking lots, courtyards, and public squares. Although the pavement hardening is well-organized, its biggest drawback is that it is impervious to water, so the replenishment of groundwater by precipitation is completely blocked. In cities that use groundwater as a source of drinking water, the falling groundwater level is difficult to rise. Experts of the Provincial Environmental Protection Bureau believe that the loss or evaporation of rainwater from the pavement makes the city dry and dry on the ground, exacerbates the pollution of urban dust, and also brings great difficulties to urban greening due to the dryness of the ground. During heavy rain, the secretion of rainwater is not smooth and accumulates on the road surface, causing traffic jams, and then exacerbating the pollution of motor vehicle exhaust emissions; on the other hand, when the rainwater crossflows, it will incorporate many urban pollutants, such as heavy metals and carbon in automobile exhaust emissions Hydrogen compounds, wear of tires, daily garbage, dust and chemicals on construction sites, pesticides sprayed on urban grasslands, etc.
Pavement hardening attracts, stores, and reflects the heat of the sun, causing the average ground temperature to rise significantly. Meteorologists said that this greatly increased the heat of summer in the city, and together increased the energy consumption paid for artificial cooling in the city. Hardened pavements can also cause many environmental and ecological negative effects, such as reducing air communication and air humidity on the pavement, combined with increasing air pollution in cities, and helping to form urban heat island effects.
This problem can be solved by using permeable bricks to harden the ground. Permeable bricks have been proposed for a long time. In the 1980s, people recognized the damage caused by hardened pavements. Cities in developed countries invested heavily to modify their past mistakes in urban construction. The permeable bricks just developed in Guangzhou have mainly used coal gangue, ceramic waste and waste glass. Therefore, if many productions are made, they will become waste, reduce and reduce pollution, and have two layers of environmental protection effects. In addition, this permeable brick has the characteristics of water permeability, breathability and high strength. Environmental protection experts analyze that the use of ceramic permeable bricks will make it easy to solve many old problems that have plagued urban environments for many years.