Preparation and construction method of inorganic mixture for brick-concrete construction waste slag recycled road base

Abstract

The preparation and construction method of the brick-concrete construction waste slag regenerated road base inorganic mixture is to grind the brick-concrete construction waste regenerated sand powder and the sand powder separately until the Blaine specific surface area is greater than 400m 2 / kg of metakaolin, calcium magnesium aluminosilicate and lime are mixed in turn according to the mass percentage of 93~97:0~1.0:2.0~6.0:0.5~1.5 and used as the solid phase of the inorganic mixture; In-house experiments for binder-stabilized materials determine optimum moisture content. During construction, determine the amount of raw materials according to the maximum dry density, and then set the modulus to 1.0~2.0, SiO 2 +Na 2 The quality of O is 0.8~1.8% of the solid phase, soda water glass is dissolved in water with an optimal water content and cooled to obtain a liquid phase, which is mixed evenly with the solid phase, and the road base is paved according to the same construction method as the cement stabilized material . The preparation and construction method of the recycled road base inorganic mixture is simple and economical, the waste residue utilization rate is high, low-carbon and environment-friendly, and the application prospect is broad.

Description

technical field [0001] The invention belongs to the field of solid waste treatment and utilization and road building materials, and particularly relates to a preparation and construction method of an inorganic mixture of brick-concrete construction waste slag regenerated road base. Background technique [0002] Construction waste refers to the collective term for muck, waste concrete, waste masonry and other wastes generated by people engaged in demolition, construction, decoration, repair and other construction industry production activities and 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 increased the output of construction waste. According to statistics, the annual discharge of construction waste in my country has reached 3 billion tons, and its recycling rate is less than 10%. [0003] Brick-concrete constructi...

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, and 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.

Images