Pervious concrete and production method thereof

Abstract

The invention discloses a pervious concrete and a production method thereof. Cement selects 42.5 level or more Portland cement, or slag cement or quick hardening cement, and a small amount of a highly-active mixed material, such as silica fume, can be mixed in order to increase the strength. The gradation of aggregate is an important index to determine the strength and water permeability, and coarse aggregate needs to adopt single size fraction of small particle sizes, such as 10-20 mm, in order to ensure the strength and good water permeability. Additionally, the strength, the particle shape(needle and tablet content) and the mud content of the of the aggregate are also required correspondingly. The pervious concrete produced through the production method allows a pervious floor to have15-25% of pores, and makes the water permeation speed reach 31-52 L / m / h which is far higher than the discharge rate of most effective rainfall discharged by a most excellent drainage configuration.

Description

technical field [0001] The invention relates to a permeable concrete and a preparation method thereof. Background technique [0002] Permeable concrete, also known as porous concrete and permeable floor, is a porous lightweight concrete made by mixing aggregate, cement and water. It does not contain fine aggregate and is covered with a thin layer of cement on the surface of coarse aggregate. The slurry is bonded to each other to form a honeycomb structure with uniform distribution of pores, so it has the characteristics of air permeability, water permeability and light weight, and can also be called sand-free concrete. It was developed and used by Europe, America, Japan and other countries to address the defects of the original urban road surface, allowing rainwater to flow into the ground, effectively replenishing groundwater, and alleviating some urban environmental problems such as the sharp drop in the city's groundwater level. And can effectively eliminate the environm...

AI Technical Summary

Problems solved by technology

However, generally speaking, the current production technology of permeable concrete in our country is still immature, and the understanding of its water permeability and vegetative properties is still inconsistent, and there is no standard to follow. To make this concrete widely recognized and popularize and apply, it still needs to be done. a lot of work

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