透水砖 。 The use of ecological permeable bricks will be promoted in landscaping . On March 14th, the Beijing Municipal Bureau of Landscaping and Greening revealed that the "water-permeable" ecological permeable bricks have officially passed the expert appraisal and are expected to be further promoted and applied in roads such as gardens, municipal roads, and parking lots.
For a long time, the streets, squares, and courtyards of residential quarters in cities have been paved with granite, cement, and glazed tiles. Therefore, almost all cities are facing the same embarrassment. On the one hand, many rainwater on the hardened ground cannot penetrate the ground, and the groundwater level drops because it cannot be replaced by rainwater, which affects the growth of flowers and trees on both sides of the journey. On the other hand, the accumulated water on the hardened pavement surface on rainy days brings inconvenience to pedestrians and traffic, and even waterlogged into waterlogging due to inadequate urban drainage equipment, increasing the burden on the dredging system and pollution of rivers.
In addition, the surface of the hardened ground is too dry, which is not only easy to form dust, but also unable to conduct heat, which increases the urban heat island effect and worsens the living environment.
Some experts from the Beijing Municipal Bureau of Highway and Gardens said that the permeability of ecological permeable bricks is above 95%, and it can trap a lot of surface water. Due to the special structure, even if it rains heavily, the permeable brick pavement can quickly penetrate the ground and enter the ground, which is useful to make up for the city ’s increasingly dry groundwater resources. In addition, most of the materials of permeable bricks are taken from the leftovers of abandoned construction waste, which saves energy and reduces costs. "More importantly, this experimental permeable brick can carry vehicles under 15 tons."
It is understood that water-permeable paving was mainly used to improve the slip resistance of pavement in the early days. With the deepening of its research, water-permeable pavement is gradually applied to route creation. In foreign countries, the research on water-permeable pavement in some developed countries is now at a relatively advanced level, and some countries have also formulated laws and regulations on water-permeable pavements, which have achieved great results. For example, Germany has used permeable materials to pave the road since the 1960s, and its policy is to transform 90% of the roads in cities across the country to permeable roads by 2010. In the early 1980s, Japan promoted the "rainwater penetration plan", which has developed permeable asphalt and concrete paving materials, which are used in park squares, parking lots, sports fields, and urban distances.
In China, due to the rapid development of urbanization, the city's water permeability is constantly weakening. Various impenetrable roads, places, and large-scale foundation equipment “enclose the city”, making it unable to “breath” freely, which not only destroys the ecological environment of the city, but also brings a lot of obscurity to the city.
However, as people gradually realized the importance of permeable materials for urban paving, the construction and reconstruction of some urban municipal engineering sections began to use permeable bricks with strong water permeability. Rare statistics show that general cement permeable bricks have been promoted on average less than 10,000 square meters per year since their introduction in 1995 to 2005. In 2006, the application volume of general cement permeable bricks in the country surged to about 1 million square meters, and in 2008 the national permeable brick market capacity reached about 5 million square meters.
People's close touch of ecological permeable bricks can be traced back to the 2008 Beijing International Energy Conservation and Environmental Protection Exhibition. At that time, there was such a floor tile called ecological sand-based permeable brick, which caused a great curiosity for visitors: no matter how much rain, through this permeable brick, it can enter the ground at the first time, and will not constitute Water accumulates on the ground and is non-slip.
Nowadays, the surface of most cities is covered by concrete pavement. If the city can have the same function as a hump, it will collect rainwater during the dry season and make good use of it to alleviate the "hunger and thirst" during the drought. Many gardeners lamented.
"The permeable pavement data has a large porosity and can accumulate more energy, which is conducive to conditioning the temperature and humidity of the urban surface. It is 6 ° C lower than the asphalt surface temperature and can effectively eliminate the heat island effect." It is said that due to the environmental protection effect of ecological permeable bricks, rainwater can quickly enter the ground surface, be reduced to groundwater, improve the water permeability and air permeability of the ground, and adhere to the soil humidity, which will undoubtedly have a very good effect on improving the urban surface ecological balance.
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