Method for preparing high-strength self-compacting concrete through recycled fine aggregate

Abstract

The invention discloses a method for preparing high-strength self-compacting concrete through recycled fine aggregate, and relates to the technical field of concrete preparation. The method comprisesthe steps that 1, the recycled fine aggregate and required saturated water are mixed and stirred evenly; the recycled fine aggregate is recycled fine aggregate particles obtained in the mode that waste concrete is crushed, shaped and sieved, and the grain size of the recycled fine aggregate particles is not greater than 10 mm; and the required saturated water is calculated according to the water demand ratio of recycled mortar prepared from the recycled fine aggregate. According to the method for preparing the high-strength self-compacting concrete through the recycled fine aggregate, the final setting time can be controlled by adjusting the using amount of an accelerator, the construction time is convenient to control, concrete construction is convenient, the construction cost of engineering can be effectively lowered, through engineering practice, the sprayed concrete does not fall off after being poured, can be firmly combined with a constructed foundation pit slope, and can effectively reinforce the foundation pit slope, and the situation of secondary rework pouring is effectively avoided; and physical properties and mechanical properties of the concrete are met.

Description

technical field [0001] The invention relates to the technical field of concrete preparation, in particular to a preparation method of recycled fine aggregate high-strength self-compacting concrete. Background technique [0002] The development and utilization of waste concrete as recycled aggregates, on the one hand, solves the problems of the difficulty in handling a large amount of waste concrete and the resulting deterioration of the ecological environment; on the other hand, it can reduce the consumption of natural aggregates in the construction industry, thereby reducing the need for The mining of aggregate stone fundamentally solves the problem of the increasing shortage of natural aggregate and the damage to the ecological environment caused by the mining of a large amount of sand and gravel, and the comprehensive benefits are remarkable. At present, most of the applications of recycled aggregates are concentrated in backfill, foundation, pavement base, etc., and are ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a method for preparing recycled fine aggregate high-strength self-compacting concrete, which solves the problem that the compressive strength of the self-compacting concrete prepared by the prior art cannot meet the requirements of high-strength concrete, so that the existing The technology cannot meet the requirements, and the mature production of self-compacting concrete prepared from recycled fine aggregate cannot be realized