Permeable concrete is also known as permeable concrete, no fines concrete, porous concrete, porous pavement, which is a porous lightweight concrete made of aggregate, cement and water. It does not contain fine aggregates, but is a honeycomb structure with evenly distributed pores formed by bonding the surfaces of the coarse aggregates to each other. So it has the characteristics of breathable, permeable, light weight and high heat dissipation, it can also be called sand-free concrete. It allows rainwater to flow into the ground, effectively replenishing groundwater and alleviating some urban environmental problems such as the sharp drop in the city’s water table. It can also effectively eliminate the environmental pollution hazards of oil compounds on the ground. At the same time, it can also protect groundwater, maintain ecological balance, alleviate the urban heat island effect and promote surface water circulation. It is conducive to the sound development of the human living environment and urban rainwater management and water pollution prevention. It is of special importance in the work of improving urban environmental problems.
Advantages of permeable flooring
Permeable flooring has 15-25% pore space, enabling permeable rates of 31-52 l/m/h, much higher than the rate at which the most effective rainfall would be discharged in the best drainage configuration.
High load-bearing capacity
The load bearing capacity of permeable flooring is fully capable of meeting the load bearing standard of C20-C25 concrete, which is higher than the load bearing capacity of a typical permeable block.
The permeable flooring has a colour optimisation scheme that can be matched with the designer’s unique creativity to achieve the decorative style required by different environments and personalities.
There is no need to worry about blocked pores, as the unique permeable paving system makes it easy to clean the floor by simply washing it with high pressure water.
Permeable paving is more resistant to freeze-thaw than normal concrete pavements and will not be subject to freeze-thaw surface fracture because of the large pores in the structure itself.
Permeable paving has better durability and wear resistance than asphalt and is close to ordinary flooring.
High heat dissipation
The inherently low density of the material (15-25% voids) reduces the ability to store heat, and the unique pore structure allows lower underground temperatures to be transferred into the ground thus reducing the temperature of the entire paved surface. These characteristics make the permeable paving system close to a ground covered by natural vegetation in terms of heat absorption and storage functions.
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The permeable concrete system has a range of colour formulas to match the creativity of the design and the construction of paving for different environments and individual requirements of the decorative style. This is a special paving material that cannot be achieved with traditional paving and general permeable tiles.
Permeable concrete is an environmentally friendly construction material that is conducive to promoting water circulation and improving the urban ecological environment. It has the characteristics of high permeability, high strength and easy construction, and can be paved into a colourful permeable concrete floor. It is mainly used for new, expanded and altered urban road projects, outdoor projects, lightly loaded roads, squares and car parks in gardening projects. At present, pervious concrete, an environmentally friendly construction material, has initially formed a complete and mature design and construction method after years of research and development and application. With the further development of research and development, environmentally friendly pervious concrete pavement will become the future development trend of urban roads.