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Eight performance characteristics of concrete application of pervious porous concrete pervious porous concrete is a relatively common kind of floor in life. This kind of floor has many advantages, and the range of use of permeable floor is very wide. Although permeable floors are widely used, there are still many people who do not know the basic characteristics of permeable floors. Let's take a look at the basic characteristics of permeable floors.

Pervious porous concrete is developed and used by Europe, America, Japan and other countries to address the defects of the original urban road pavement, which allows rainwater to flow into the ground, effectively supplements groundwater, and alleviates some urban environmental problems such as the rapid decline of the city's groundwater level. And can effectively eliminate the harm to the environment caused by oil compounds on the ground.

At the same time, it is an excellent paving material that protects groundwater, maintains ecological balance, and can alleviate the urban heat island effect; it is of special significance for the sound development of the human living environment and urban rainwater management and water pollution prevention.

Permeable concrete has been researched and applied in the United States since the 1970s and 1980s, and many countries have been widely promoting it. For example, Germany is expected to transform 90% of its roads into permeable concrete in the short term, changing the ground that destroyed urban ecology in the past. Laying makes the permeable concrete pavement depend on a wide range of social benefits.

Pervious concrete-performance characteristics

1. High water permeability

The permeable floor has 15%-25% pores, which can make the water permeation rate reach 31-52 liters/m/h, which is much higher than the discharge rate of effective rainfall under an excellent drainage configuration.

2. High bearing capacity

Appraisal by the national inspection agency, the bearing capacity of the permeable floor can fully meet the bearing standards of C20-C25 concrete, which is higher than the bearing capacity of ordinary permeable bricks.

3. Good decorative effect

The permeable floor has an optimized color matching scheme, which can cooperate with the designer's unique creativity to achieve the decorative styles required by different environments and personalities. This is difficult to achieve in general permeable bricks.

4. Ease of maintenance

The problem of pore clogging that people worry about is unnecessary. The unique water-permeable paving system makes it easy to solve it only by high-pressure water washing.

5. Freeze-thaw resistance

Water-permeable pavement has stronger freeze-thaw resistance than general concrete pavement, and will not be affected by freeze-thaw surface fracture because its structure itself has larger pores.

6. Durability

The durability and wear resistance of the permeable floor is better than that of bitumen, which is close to ordinary floor, avoiding the short service life and uneconomical shortcomings of general permeable bricks.

7. High heat dissipation

The low density of the material itself (15-25% voids) reduces the heat storage capacity, and the unique pore structure allows a lower underground temperature to be transmitted to the ground, thereby reducing the temperature of the entire paved ground. These characteristics make the permeable paving system It is close to the ground covered by natural vegetation in terms of heat absorption and heat storage functions.

8. Fatigue strength

Due to the use of open-graded mixtures, the fatigue strength is low.

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