Porous lightweight concrete and preparation method thereof

Abstract

The invention discloses porous lightweight concrete, and also discloses a preparation method thereof, and the porous lightweight concrete comprises 280-300 parts by weight of cement, 200-250 parts byweight of concrete slag, 40-45 parts by weight of sand, 900-1200 parts by weight of gravel, 30-40 parts by weight of fly ash, 80-100 parts by weight of water, 2-5 parts by weight of polypropylene fiber, 30-80 parts by weight of fine sand, 4-5.5 parts by weight of a binder, 2-5 parts by weight of a water reducer, 15-22 parts by weight of ferric sulfate, 500 to 800 parts by weight of a reinforcing agent, 3 to 5 parts by weight of carbonate, 300 to 400 parts by weight of steel slag, 8 to 10 parts by weight of diatomite, 150 tO250 parts by weight of a lotus leaf hydrophobing agent, 100 to 150 parts by weight of activated carbon and 320 to 340 parts by weight of toughening fiber. According to the method, the steel slag and the concrete slag are added in the preparation process of the concrete,and wastes such as the steel slag, the concrete slag and the like improve the compressive strength of the concrete, improve the mechanical properties such as shear resistance and the like, reduce thecost, and implement the national technical and economic policies of saving resources and green production.

Description

technical field [0001] The invention relates to a lightweight concrete, in particular to a lightweight concrete and a preparation method thereof. Background technique [0002] With the substantial increase in production capacity under working conditions and age problems, a large amount of steel slag waste and broken concrete will be produced. The traditional treatment methods are landfill or stacking, which not only consumes a lot of construction costs such as arable land and garbage removal. , and caused a lot of pressure on environmental governance. In order to alleviate the above pressure, waste concrete is often used directly as the aggregate of porous concrete. Porous concrete is a concrete with a special pore structure. Aggregate, cement, water, admixtures, etc. are made by special technology. Porous concrete must have good air permeability and water permeability, so that it is widely used on both sides of urban roads, river slope protection, roofs, and parking lots. ...

AI Technical Summary

Problems solved by technology

[0002] With the substantial increase in production capacity under working conditions and age problems, a large amount of steel slag waste and broken concrete will be produced. The traditional treatment methods are landfill or stacking, which not only consumes a lot of construction costs such as arable land and garbage removal. , and caused a lot of pressure on environmental governance. In order to alleviate the above pressure, waste concrete is often used directly as the aggregate of porous concrete. Porous concrete is a concrete with a special pore structure. Aggregate, cement, water, admixtures, etc. are made by special technology. Porous concrete must have good air permeability and water permeability, so that it is widely used on both sides of urban roads, river slope protection, roofs, and parking lots. It even plays the role of improving the heat and humidity exchange capacity and reducing the surface temperature of concrete materials. However, when waste concrete is used as the aggregate of porous concrete, there are often problems of low aggregate strength and high water absorption, and direct use will lead to partial strength of porous concrete. Low, large shrinkage and other problems, which can not meet the requirements of porous concrete, affecting its normal use