First, what is permeable cement?
Permeable concrete binder consists of aggregate macadam, binder, additive, cement, water, etc. After mixing evenly, pave the road. Compared with traditional concrete, it has higher strength and durability, and can meet the requirements of mechanical properties, service function and service life of the structure; Coordinate with the natural environment, reduce the load of the earth and the ecological environment, and realize the recycling of non-renewable resources; It has a good use function and can create a gentle, comfortable and convenient living environment for human beings. Permeable concrete binder can make rainwater quickly penetrate into the surface, effectively replenish groundwater, alleviate urban heat island effect and protect urban natural water system from damage, which has strong environmental protection value. At the same time, it solves the problem that ordinary pavement is easy to accumulate water, improves the safety and comfort of walking, and is also of great significance to improving the living environment.
Second, the product performance of permeable concrete binder
Permeable concrete binder has a porosity of 15%-25%, which can make the water permeability reach 3 1-52 l/m/h, which is much higher than the drainage rate of effective rainfall under excellent drainage configuration. Appraised by national testing institutions, the bearing capacity of permeable concrete binder can completely reach the bearing standard of C20-C25 concrete, which is higher than that of ordinary permeable bricks. Permeable concrete binder has a color optimization scheme, which can cooperate with the designer's unique creativity and realize the decorative style required by different environments and personalities.
This is difficult for ordinary permeable bricks to do. The problem of pore blockage that people are worried about is unnecessary, and the unique permeable pavement system can be easily solved by high-pressure water flushing. Permeable pavement has stronger freeze-thaw resistance than ordinary concrete pavement, and will not break due to freeze-thaw, because its structure itself has larger pores. The durability and wear resistance of permeable floor are better than asphalt and close to ordinary floor, which avoids the shortcomings of short service life and uneconomical of ordinary permeable brick. The low density (65,438+0.5-25% void ratio) of permeable concrete binder reduces the heat storage capacity, and the unique pore structure makes the lower underground temperature pass into the underground, thus reducing the temperature of the whole pavement. These characteristics make the permeable pavement system close to the ground covered by natural vegetation in terms of heat absorption and heat storage functions.
The above-mentioned permeable cementing materials are mostly used in the field of transportation or building materials, and together with other concrete or sand, they can play a role in safety protection. For example, when used on building pavement, it can achieve the effect of sound absorption and noise reduction, improve the ecological cycle of the surface and solve the negative impact brought by urbanization. In other words, permeable concrete, as a new multifunctional material mentioned above, can also provide a series of price and color choices, which you can learn through practice.
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