Our country is seriously poor in water. If measured by the per capita water resources, China only accounts for 1 / 4 of the world average, ranking after 110th. The situation of water shortage is widespread in our country, and there is a growing trend. Many cities in the country have different degrees of water shortage, including more than 110 cities with serious water shortage. China's water resources are characterized by uneven regional distribution and unbalanced combination of water and soil resources; concentrated distribution within the year and great changes between the years; outstanding years of continuous high and continuous low; serious river sedimentation. These characteristics cause the contradiction between supply and demand of water resources in our country, and also determine that the task of development and utilization of water resources in our country is very arduous. The research, development and application of pervious brick is very important to save valuable water resources and alleviate the contradiction between supply and demand of water resources. However, after one year's use on the pavement, the pervious rate of concrete pervious brick has been reduced by 1 / 3, which has been the bottleneck of pervious brick's application.
Today's China Building Materials Press published a signed article by Yang Bin, a famous waterproof material expert and professor level senior engineer of building materials industry technology supervision and research center. Through the analysis of raw materials, laying materials and use environment of permeable bricks, this paper analyzes the problems encountered in the promotion and application of permeable bricks in a professional and scientific way, and probes into the corresponding solutions, hoping to improve the product quality of permeable bricks The promotion and application of energy can play a promoting role.
To build a resource-saving and environment-friendly society and save water resources has naturally become a hot topic of concern to the whole society for a country as many as 400 cities short of water. Rainwater recycling has naturally been put on the agenda. Permeable brick has become a new favorite of floor materials, frequently appearing in the exhibition, and also become a hot spot of newspaper, television and other media publicity reports. Production enterprises think that they have captured business opportunities, municipal departments think that they have found a shortcut to recover rainwater, investors are eager to try, and capital begins to tilt to this market.
At the exhibition site, the staff fell the water from the upper surface of the permeable brick. In an instant, the water seeped from the lower surface in the direction of the thickness of the brick and dripped down. The penetrating permeable function of the permeable brick attracted the audience's attention. But this is the "performance" of permeable brick at the exhibition or in the laboratory, using pure water, or distilled water without gas, or tap water. If the pervious brick is laid on the road or square, the actual environmental conditions are much more complex than those of the exhibition stand and the laboratory. Rain, mud and mud are splashed on the surface of permeable bricks. Can bricks be permeable? Maybe it can be permeable today, but can it still be permeable after 1 month, 3 months, half a year and 1 year of use? Maybe a lot of people don't think about it.
The author does not deny that permeable brick is a kind of floor material with permeable performance. This kind of product is also available abroad, but its usage is not large. The enterprises that develop and produce this kind of products in our country have done a lot of work and made some achievements, finding a new way for laying permeable ground. However, science is "seeking truth from facts", which can not avoid the inevitable problems in the process of popularization and use of permeable brick, that is, the use of environmental conditions severely restricts the play of its permeable function, and the poor use environment may make permeable brick completely lose its permeable function.
