Preparation and construction method of brick-concrete building waste residue recycled road base inorganic mixture

Abstract

The invention relates to a preparation and construction method of a brick-concrete building waste residue regenerated road base inorganic mixture. The preparation method comprises the following steps:uniformly mixing brick-concrete building waste residue regenerated sand powder with metakaolin, calcium magnesium aluminosilicate and lime in sequence according to the mass percentage of 93-97: 0-1.0: 2.0-6.0: 0.5-1.5 to obtain a solid phase of the inorganic mixture, wherein the metakaolin, the calcium magnesium aluminosilicate and the lime are ground into powder with the Blaine specific surfacearea being greater than 400m<2>/kg; performing an indoor experiment of the inorganic binder stabilizing material by referring to related test regulations to determine the optimal water content; duringconstruction, determining the raw material proportioning according to the maximum dry density, then dissolving sodium water glass with the modulus of 1.02.0 and the mass of SiO2 + Na2O being 0.81.8%of that of a solid phase with water with the optimal water content, cooling the mixture to obtain a liquid phase, uniformly mixing the liquid phase and the solid phase, and paving a road base according to the construction method the same as that of a cement stabilizing material. The preparation and construction method of the recycled roadbed inorganic mixture is simple and economical, high in waste residue utilization rate, low-carbon, environment-friendly and wide in application prospect.

Description

technical field [0001] The invention belongs to the field of solid waste treatment and utilization and road building materials, and in particular relates to a preparation and construction method of an inorganic mixture for reclaiming road bases from brick-and-concrete construction waste slag. Background technique [0002] Construction waste refers to the general designation of muck, waste concrete, waste masonry and other waste produced by people engaged in production activities in the construction industry such as demolition, construction, decoration, and repair, as well as natural disasters such as floods and earthquakes. The rapid development of urban construction in my country, the demolition of old buildings, and the occurrence of natural disasters such as earthquakes have led to an increase in the output of construction waste. According to statistics, my country's annual discharge of construction waste has reached 3 billion tons, and its recycling rate is less than 10%...

AI Technical Summary

Problems solved by technology

According to statistics, my country's annual discharge of construction waste has reached 3 billion tons, and its recycling rate is less than 10%. Most of them are stacked in the open air, incinerated or simply landfilled without treatment, which not only destroys ecology, occupies land, but also pollutes the environment.

Moreover, a large amount of sand powder produced during the crushing of brick-concrete slag cannot be used in road base materials.

In short, the utilization rate of brick-concrete slag is low when used as road base materials, and the processing technology is relatively complicated, which affects the waste rate, economy and environmental protection of recycled base materials

[0005] It is generally believed that the activity of brick-concrete slag is very low, and its fine powder should not be used directly as a cementitious material.

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