Recycled aggregate medium-dry hard concrete prepared by using building waste and preparation method of recycled aggregate medium-dry hard concrete

Abstract

The invention discloses a recycled aggregate medium-dry hard concrete prepared by using building waste, which comprises the following raw materials of coarse aggregate, fine aggregate, a gelatinizing agent, a water reducing agent and water, wherein the gelatinizing agent comprises cement and coal ash, and the coarse aggregate comprises 50-100 percent of recycled coarse aggregate prepared from thebuilding waste. A preparation method of the recycled aggregate medium-dry hard concrete comprises the following steps of: pretreating the building waste, removing impurities, remaining waste concrete, waste bricks and the like; crushing and screening to prepare the recycled coarse aggregate; mixing the recycled coarse aggregate, natural sand, cement and water according to the proportion, adding the coal ash and the water reducing agent, stirring uniformly to obtain a mixture; and squeezing and forming the mixture, curing for 2 days to obtain the recycled aggregate medium-dry hard concrete. The invention solves the problems of worsening ecological environment and the like caused by difficulty in treating the building waste; and the building wastes are used for manufacturing the recycled aggregate for replacing natural aggregate, the increasingly deficient natural aggregate and damage degree to the ecological environment are reduced, and the living environment of human beings is protected. The recycled aggregate medium-dry hard concrete prepared by using the method has high strength and high abrasive resistance, and can be used for building base installations such as city roads, housing constructions and the like.

Description

technical field [0001] The invention relates to a semi-dry hard concrete and a preparation method thereof, in particular to a recycled aggregate semi-dry hard concrete prepared from construction waste and a method thereof. Background technique [0002] According to the workability of the mixture, concrete can be divided into dry hard concrete, semi-dry hard concrete, plastic concrete, fluid concrete, high fluid concrete and fluid concrete. Generally, the concrete whose consistency value is greater than 30s is called super-dry hard concrete, the consistency value between 20s and 30s is called dry hard concrete, and the consistency value less than 20s is called semi-dry hard concrete. Ordinary concrete in construction engineering is called ordinary concrete mixture before it is set and hardened. It must have good consistency and workability, which is convenient for construction operations such as mixing, transportation, pouring, and tamping, and has the properties of uniform ...

AI Technical Summary

Problems solved by technology

Because the physical properties of waste concrete and natural building materials are quite different, such as the water absorption rate of waste concrete is relatively large, usually 3.6-8%, while the water absorption rate of natural aggregate is less than 3%, the construction quality cannot be guaranteed if the usual method is used. and service life

[0004] "Construction Method of Dry Hard Concrete" Patent No. 201010501877.0 of Chinese patent literature report, "A kind of preparation method of Dry Hard Concrete Test Block" Patent No. 201010501859, all are dry hard concrete construction methods, there is no semi-dry hard concrete, especially It is a patent report on the construction method of recycled aggregate semi-dry hard concrete

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