A method for preparing small-scale hollow blocks of lightweight aggregate concrete by using industrial solid waste

Abstract

The invention relates to the technical field of building materials, in particular to a method for preparing a small hollow light aggregate concrete block from industrial solid waste residues. Buildingwastes are collected, classified and then crushed into particles respectively, the particles are washed for mud settling treatment, recycled aggregate is obtained, the recycled aggregate is compounded with coal-fired furnace slag and cement, the proportion is controlled, so that the prepared hollow block has the density grade meeting the grade-800 requirement, the strength grade meeting the grade-MU5.0 requirement, the water absorption rate smaller than or equal to 9%, the dry shrinkage rate smaller than or equal to 0.046%, the relative water content smaller than or equal to 32%, the softening coefficient larger than or equal to 0.89, the carbonization coefficient larger than or equal to 0.91, the freezing and thawing strength loss lower than or equal to 12% and the freezing and thawing quality loss lower than or equal to 3.6%. Besides, the adding amount of the industrial solid wastes reaches 86.3%, and the preparation cost of the thermal insulation block is reduced to a great extent.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a method for preparing small hollow blocks of lightweight aggregate concrete by using industrial solid waste residues. Background technique [0002] In recent years, with the rapid development of urbanization in my country, industrial construction has continued to expand, leading to a substantial increase in the generation and discharge of construction waste and industrial solid waste. According to reports, the amount of construction waste generated and discharged in my country is more than 400 million tons every year during construction and construction, and the amount of construction waste generated due to demolition and relocation is huge; the total amount of construction waste in my country accounts for approximately If these wastes are not utilized, it will not only cause a waste of resources, but also affect the ecological environment and the lives of ordinary peo...

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Problems solved by technology

[0004] However, in the prior art, there are still unreasonable structures, high quality, high density, high cost, poor thermal insulation performance and water-proof and moisture-proof performance for the preparation of small-scale hollow blocks of light aggregate concrete. Moreover, due to the poor formability of the hollow blocks, it is difficult to build masonry and the cycle is long, so that the quality of the hollow blocks is still unsatisfactory.

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