A kind of granite waste rock powder ceramsite permeable concrete and preparation method thereof

Abstract

The invention provides granite waste rock powder ceramsite pervious concrete and a preparation method thereof. The granite waste rock powder ceramsite pervious concrete is prepared from the following ingredients in percentage by weight: 60 to 75 percent of granite waste rock powder ceramsite, 10 to 25 percent of cement, 6 to 20 percent of pulverized fuel ash, 0.1 to 0.5 percent of water reducing agents and 7 to 8 percent of water, wherein the granite waste rock powder ceramsite has the grain diameter being 10 to 20mm, and is prepared from the following ingredients in percentage by weight: 50 to 80 percent of granite waste rock powder, 4 to 15 percent of clay tailings, 10 to 20 percent of waste porcelain powder, 5 to 10 percent of clay and 1 to 5 percent of coal dust. A large amount of granite waste rock powder ceramsite is used for replacing natural aggregate; the surface of the granite waste rock powder ceramsite is hard; fine and fine honeycomb micropores are formed at the inside; the characteristics of small density, low heat conductivity, high strength and good water permeability are realized. Meanwhile, the fireproof performance of the ceramsite sintered through high temperature is excellent; the consistency with the concrete is good; the performance of the pervious concrete can be obviously improved.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a granite waste rock powder ceramsite permeable concrete and a preparation method thereof. Background technique [0002] In recent years, in response to the phenomenon of urban waterlogging and non-point source pollution in my country, the construction concept of "sponge city" has emerged as the times require, that is, we hope that our cities can absorb, store, infiltrate and purify water like sponges when it rains. When the stored water is "released" and used. Sponge city construction follows the principle of ecological priority and combines natural approaches with artificial measures. On the premise of ensuring the safety of urban drainage and waterlogging, it maximizes the accumulation, infiltration and purification of rainwater in urban areas, and promotes the utilization of rainwater resources and ecological protection. environmental protection. [0003] Permeable concrete...

AI Technical Summary

Problems solved by technology

[0004] At present, the aggregates of permeable concrete are mostly concentrated in natural sand and gravel, and the mining of natural sand and gravel is extremely unfavorable to the ecological cycle. Patent CN 105272067 A discloses a lightweight permeable concrete containing ceramsite, including mixing water, cement, Ceramsite and admixture, the ceramsite is coal gangue ceramsite, the ceramsite produced by the solid waste discharged in the coal mining process and coal washing process is used to replace the natural aggregate, which reduces the demand for natural stone in concrete, but the prepared Permeable concrete has low water permeability coefficient and insufficient strength, which cannot meet the needs

Patent CN 103936346 A discloses a shale ceramsite permeable ecological concrete, including total cementitious material, shale ceramsite, water reducer and water, by selecting shale ceramsite and other raw materials to make the shale ceramsite Form point-like contact between them and have good porosity. Although the porosity is relatively good, the strength is still obviously insufficient, which affects the popularization and application of permeable concrete.