A kind of recycled concrete mixed with rubber particles and its preparation method and application

Abstract

The invention provides recycled concrete doped with rubber particles as well as a preparation method and application thereof. Construction garbage is disinfected, broken, decontaminated, sieved, strengthened and the like to prepare recycled aggregates; abandoned rubber tyres and the like are used for preparing rubber particles through technologies including disinfection, breaking, preprocessing, temperature change fluid method processing, strengthening processing and the like; the obtained recycled composite aggregates, silicate cement, water and other mineral admixture are mixed to prepare different concrete products, including recycled concrete prefabricated wall panels, building blocks and the like doped with rubber particles, through a subsequent technology by controlling different proportions. The concrete prepared with the method has the advantages of environment protection, low price, stable mechanical property, good durability and the like.

Description

technical field [0001] The invention belongs to the field of civil engineering materials, and in particular relates to recycled concrete mixed with rubber particles, a preparation method and application thereof. Background technique [0002] With the continuous advancement of the urbanization process, the discharge of construction waste in my country is increasing at a relatively high rate, and the proportion of renewable components in construction waste can reach 60%-100%. However, my country started relatively late in the research and industrialization of construction waste recycling. Although experts and scholars have done some basic work and some areas have begun to try to use some recycled building materials or products, such as recycled aggregate concrete, steamed Pressed products, concrete blocks, etc., but have not been widely promoted, and most of the construction waste is still landfilled or stockpiled. [0003] The current technology has the following problems: (1...

AI Technical Summary

Problems solved by technology

However, my country started relatively late in the research and industrialization of construction waste recycling. Although experts and scholars have done some basic work and some areas have begun to try to use some recycled building materials or products, such as recycled aggregate concrete, steamed Pressed products, concrete blocks, etc., but have not been widely promoted, and most of the construction waste is still landfilled or stockpiled

[0003] The current technology has the following problems: (1) The traditional recycled aggregate particles have many edges and corners, the surface is rough, and the components also contain hardened cement slurry. In addition, the concrete block has a large amount of internal damage caused by the accumulation of damage during the crushing process. Microcracks lead to large porosity, high water absorption, low bulk density, large bulk void ratio, and high crushing index value of the recycled aggregate itself; the recycled concrete prepared from this recycled aggregate consumes a lot of water and has a high strength after hardening. Low, low elastic modulus, and the durability properties such as impermeability, frost resistance, carbonation resistance, shrinkage, creep and chloride ion penetration resistance are all lower than ordinary concrete

(3) The output of traditional recycled aggregate recycled products is not high, the quality is unstable, and there are technical bottlenecks in the preparation of high-performance recycled building products

Images