Recycled concrete capable of reducing porosity and preparation method thereof

Abstract

The invention discloses recycled concrete capable of reducing porosity and a preparation method of the recycled concrete. The preparation method comprises the following steps: step 1, carrying out pretreatment such as collection, cleaning, beating and impurity removal on waste concrete; 2, the pretreated concrete blocks are subjected to crushing, screening and grading treatment; step 3, mixing the treated concrete particles with raw materials in a corresponding proportion to form concrete recycled aggregate; and 4, treating the recycled aggregate to form mortar, and pouring and vibrating to form new recycled concrete. According to the recycled concrete capable of reducing the porosity and the preparation method, gaps among slurry can be filled by adding the water reducing agent, the nano silicon dioxide, the reinforcing filler and the acid solution, so that the porosity is reduced, and meanwhile, the swelling agent, the Portland cement, the mineral powder, the anti-cracking agent, the reinforcing filler and the curing filler are added, so that the porosity is reduced. The performances of deformation resistance, impact resistance, compression resistance, permeation resistance and the like of the concrete can be enhanced.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to recycled concrete capable of reducing porosity and a preparation method thereof. Background technique [0002] The rapid development of the construction industry has increased the demand for cement concrete. However, with the rapid increase in the demand for concrete and the mass production of waste concrete, the resulting resource, energy and environmental problems have become increasingly serious. Recycling construction waste to replace some natural resources to produce building materials is an important way to protect the natural environment, improve the environment, and advance sustainable development. Recycled concrete refers to the waste concrete that is crushed, cleaned, and classified. It is a new type of concrete prepared by distributing and mixing in a certain proportion, partially or completely replacing natural aggregates such as sand and gravel, and then adding ceme...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of recycled concrete and preparation method that can reduce porosity, in order to solve the existing recycled concrete on the market and the preparation method that the above-mentioned background technology proposes the porosity among materials is relatively high, cracks, fall off easily appear and other phenomena, while using the problem that the strength is lower than that of ordinary concrete