Modified premixing plant waste slurry slag and preparation method and application thereof in foam concrete

Abstract

The invention relates to modified waste slurry slag of a premixing plant as well as a preparation method and application of the modified waste slurry slag in foam concrete. The modified waste slurry slag of the premixing plant is composed of waste slurry slag of the premixing plant, modified shale pottery sand, a dispersing agent, fibers and water, and the modified shale pottery sand is obtained by infiltrating shale pottery sand in a tea saponin aqueous solution until the shale pottery sand absorbs water to be saturated. After modification treatment, the overall activity of the waste slurry residues is improved, slurry is more homogeneous, the waste slurry residues can be used as an admixture to be doped into a concrete material, and the utilization efficiency of the waste slurry residuessubjected to filter pressing in a premixing plant is remarkably improved. The modified pre-mixing plant waste slurry slag is used in the foam concrete, so that the slurry stability of the foam concrete can be improved, the properties of crack resistance, heat preservation, strength and the like are improved, and the problems of easiness in cracking, difficulty in maintenance and the like are solved. The preparation method of the modified waste slurry slag of the premixing plant is simple and can be connected with the whole foam concrete production process, modification and production are carried out synchronously, and a technological process and a production mode for efficient utilization of the waste slurry slag of the premixing plant are formed.

Description

technical field [0001] The invention belongs to the field of recovery and utilization of construction waste, and in particular relates to a modified ready-mixing plant waste slurry and its preparation method and application in foamed concrete. Background technique [0002] The waste slurry slag of the ready-mixing plant is the mixture of waste concrete, waste slurry from mixer truck washing, waste slurry from cleaning of ready-mixing equipment in the ready-mixing plant, etc. after passing through the sand separator and filter press. According to incomplete statistics, every The production of 1 cubic meter of concrete will produce about 20kg of waste materials, while my country produces about 1.64 billion cubic meters of concrete every year, and the annual waste material generation reaches 32.8 million tons. Most of the waste materials from ready-mixing plants are disposed of in landfill in my country, occupying a large amount of land resources and causing a heavy burden on th...

AI Technical Summary

Problems solved by technology

However, in practical applications, especially in the process of forming and hardening, foamed concrete is difficult to maintain and is prone to shrinkage and cracking.