What materials are used in sponge engineering?

The materials used in sponge engineering are permeable brick and permeable concrete.

1, permeable brick

Water permeable brick is made of river sand, cement and water, and a certain proportion of penetrant is added to make concrete products. Water permeable brick is a kind of pavement brick with strong water absorption function. When the brick body is filled with water, the water will be discharged underground.

Water permeable brick is an environmentally friendly building material product in the new century, which was grandly born to solve the urban ground hardening and maintain the urban ecological balance. Water-permeable brick has the characteristics of keeping the ground permeable, moisturizing, anti-slip, high strength, cold resistance, weather resistance, noise reduction and sound absorption. The defect of permeable brick can't drive a motor vehicle.

2. Permeable concrete

Permeable concrete is composed of cement, water and permeable concrete reinforcing agent (cementitious material) mixed with high-quality aggregate with the same particle size or discontinuous gradation. And has a certain porosity. When it is made into concrete pavement, slope protection and its products, can it achieve the effects of drainage, anti-skid, sound absorption, noise reduction and water seepage? Can improve the surface ecological cycle.

Conducive to traffic safety and protection of living environment. Solve the negative impact of large-scale modern city construction. Appraised by national testing institutions, the bearing capacity of permeable ground can completely meet the bearing standard of C20-C25 concrete, which is higher than that of ordinary permeable bricks.

Brief introduction of sponge engineering

Sponge city is a new generation of urban rainwater management concept, which means that a city can be as flexible as a sponge when it adapts to environmental changes and responds to natural disasters caused by rain, and it can also be called a "water-elastic city".

Cities, like sponges, have good "elasticity" in adapting to environmental changes and responding to natural disasters. The international name is "low-impact rainwater system construction", which absorbs water, stores water, seeps water and purifies water when it rains, and releases the stored water when necessary to realize the free migration of urban rainwater.