Preparation method of novel building reclaimed sand

Abstract

The invention discloses a preparation method of novel building reclaimed sand. The building reclaimed sand is prepared by the following steps: mechanically pulverizing construction waste, generated after building demolition, into the construction waste in a gravel state; mechanically pulverizing the construction waste in the gravel state again to form reclaimed sand in a fine sand state, wherein technical indicators of the reclaimed sand are as follows: bulk density is 1150kg / m<3>, mud content is 6.0%, clod content is 1.2%, the water absorption rate is 5%, total brick content is 0.2%, and organic matter content is qualified; preparing concrete and mortar with the reclaimed sand to improve the performance of concrete and mortar, reduce bleeding, increase the fluidity and workability of a mixture, and adding a reinforcing agent, so that the performance of a concrete mixture reaches the standards. The invention solves the environment pollution problem caused by waste discharged during building demolition, solves the problem of natural fine aggregate resource shortage, is conducive to the environment protection of an aggregate production area, and reduces the problems of land occupation and environment pollution of urban waste.

Description

technical field [0001] The invention belongs to a building material, in particular to a preparation method of a new type of building reclaimed sand, and relates to a regenerated building material, which aims to solve the environmental pollution caused by the waste discharged during the demolition of buildings, and utilize the construction waste A process for producing recycled sand for construction. Background technique [0002] At present, the waste concrete discharged from the demolition of buildings in China is the largest waste in the construction industry. A large number of concrete buildings will be demolished after reaching the end of their service life. The large amount of waste concrete after demolition will cause great environmental problems. Occupying a large amount of land as a discharge site, and wasting manpower and material resources for the maintenance of the discharge site, it also leads to secondary pollution of the environment. With the rapid development ...

AI Technical Summary

Problems solved by technology

There are a few areas in China that have been depleted, and most areas are in short supply, and the supply is very tight. Excessive collection of sand from quarrying and digging will cause harm to the environment and seriously damage the ecological balance.