Recycled aggregate concrete performance improvement method

Abstract

The invention discloses a recycled aggregate concrete performance improvement method. The method comprises 1, improving recycled concrete strength, 2, improving recycled concrete durability and 3, adding an active admixture and an additive into the recycled concrete. Waste and old material regeneration and recycle have many advantages and save a natural resource especially in an aggregate deficient region. Cement particles which are not completely hydrated are used in waste and old concrete and can stimulate further concrete reaction. The recycled aggregate can reduce a cement use amount, reduce cement production-caused pollution and produce huge benefits in road bridge construction and civil buildings by use of recycled stone.

Description

technical field [0001] The invention belongs to building science and technology, in particular to the technical field of recycled aggregate concrete. Background technique [0002] Concrete material is an indispensable material basis in the construction of human civilization. With the continuous advancement of human civilization and the acceleration of urbanization worldwide, the per capita consumption of concrete materials is increasing, and at the same time, environmental problems are becoming more and more significant. At present, the annual output of concrete in the world is about 2.8 billion cubic meters, and the annual output of concrete in my country accounts for about 45% of the world's total, about 1.3 to 1.4 billion cubic meters. For a long time, due to the wide availability and low price of sand and gravel aggregates, they were considered to be inexhaustible raw materials and were not valued. The result was landslides, riverbed diversions, and severe damage to th...

AI Technical Summary

Problems solved by technology

Overall, the durability of recycled concrete is inferior to that of ordinary concrete