Regenerated aggregate concrete and preparation method thereof

Abstract

The invention discloses regenerated aggregate concrete and a preparation method thereof. The regenerated aggregate concrete is prepared from the following raw materials in percentage by weight: 15 to 20% of cement, 5 to 15% of water, 0.5 to 40% of natural coarse aggregate, 30 to 70% of waste concrete regenerated coarse aggregate, 0.03 to 0.05% of methacrylic acid, 0.02 to 0.08% of neopentyl glycol, 0.5 to 1% of composite toughening material, 5 to 10% of fly ash, 0.5 to 1% of polyacrylate, 0.01% to 0.03% of early strength agent, and 0.01 to 0.03% of water reducer. The prepared regenerated aggregate concrete has the advantages that the toughness, anti-fatigue property and isotropy are good, the synergistic toughening effect of the materials is favorably performed, and the strength can reach 60 to 80MPa; the regenerated aggregate concrete is suitable for preparing bearing structures, and can fill the blank in existing study in China.

Description

technical field [0001] The invention belongs to the field of concrete preparation, and in particular relates to a recycled aggregate concrete and a preparation method thereof. Background technique [0002] The relationship between the quality of recycled concrete and the performance of original concrete and mortar, the damage of original concrete, the method of breaking and the composition of the new mixture have been studied at home and abroad. The quality of the recycled concrete and the quality of the interface zone, as well as the mortar content in the matrix concrete play an important role in determining the performance of recycled concrete. The strength characteristics of recycled concrete are affected by some key factors such as the strength of the matrix concrete, the ratio of coarse and fine aggregates in the matrix concrete, the ratio of the maximum particle size of the aggregate in the matrix concrete to the maximum particle size of the recycled concrete aggregate...

AI Technical Summary

Problems solved by technology

At the same time, the research results show that the mechanical properties of recycled aggregate concrete in load-bearing structures are limited, because the performance of recycled aggregate concrete is relatively poorer than the aggregate effect of ordinary concrete, and the higher the strength of concrete, the greater the brittleness, so it is necessary to There is a technical bottleneck in obtaining recycled aggregate concrete in load-bearing structures, for which it is necessary to toughen recycled aggregate concrete