High-strength highly-permeable concrete and method for making the same

Abstract

The invention aims at providing a concrete high strength and permeability and a preparation method thereof. The invention adopts the following technical scheme: cement with high strength, a special building material additive and special forming method are used; Aeolian sands in desert or fly ashes produced during the power generation of power plants are used as raw materials to prepare the concrete with high permeability. The used raw materials of the invention respectively are: 40-50 grade of ordinary porland cement; gravels, Aeolian sands in desert and fly ashes with respective particle diameter of 10.0-13.0mm, 5.0-10.0mm and 2.5-5.0mm, the adding ratio of which is selected freely; NNO type water reducing agent and JM-SCA type strengthening agent. The concrete made through the method is provided with good permeability, and the compressive strength can reach to 35MPa above. Passage tiles made through the method can be used to pave roads to greatly reduce hydrops on the surface of the roads. In local areas, sewer pipes even can be reduced or do not have to be paved. For even a heavy rainstorm encountered in 100 years happens, rains can rapidly permeate in soils through the tiles successfully in five minutes, which can be changed into renewable underground water.

Description

technical field [0001] The invention relates to a building material, more specifically to a high-strength, high-permeability concrete and a method for making pedestrian floor tiles, which belong to the field of new building materials. Background technique [0002] my country is a country with a large population and an extreme shortage of natural water resources. With the rapid development of modern industry and agriculture, a large amount of groundwater is extracted, and the ground surface that supplements groundwater is increasingly covered by impermeable asphalt or cement concrete materials, which makes the decreasing water resources more and more depleted. If this situation continues, it will inevitably cause the subsidence of the ground surface, resulting in the deformation and destruction of ground structures, which will directly affect the living space of human beings. Moreover, the rainwater that falls on the impervious ground during the rainy season not only increas...

AI Technical Summary

Problems solved by technology

But the key problem is that this kind of concrete generally has the disadvantage of low compressive strength.

At present, the compressive strength of permeable concrete pavement bricks developed in China is generally 10-25MPa, which is still far from the minimum compressive strength (30MPa) stipulated by the national building materials industry standard concrete pavement