C40 regenerated concrete and preparation method thereof

Abstract

The invention has a core task for providing C40 regenerated concrete and a preparation method thereof. The C40 regenerated concrete is prepared from the following components: cement, water, fine aggregates and coarse aggregates, wherein a mixing ratio of the cement to the water to the fine aggregates to the coarse aggregates is 1:0.49:1.55:3.3, wherein the coarse aggregates comprise common coarseaggregates and regenerated coarse aggregates; the mixing ratio of the common coarse aggregates to the regenerated coarse aggregates is 1:1.5, and a particle size range of the common coarse aggregatesand the regenerated coarse aggregates is 5 to 26.5 mm; the cement used by a test piece is common Portland cement, and the used regenerated coarse aggregates are concrete waste. The C40 regenerated concrete provided by the invention has the advantages of simple technology and low production cost while the strength of the regenerated concrete is ensured, so that a popularization and application value of the regenerated concrete is increased.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to the technical field of concrete. Background technique [0002] The raw materials of concrete include coarse aggregate, cement, water, and fine aggregate. These raw materials are mixed by a mixer according to a certain proportion, and then poured into a concrete structure. Coarse aggregate plays a skeleton role in concrete and guarantees the strength of concrete. At present, coarse aggregate is usually two kinds of natural crushed stone and pebble. Crushed stone is made of natural rocks and pebbles through mechanical crushing and screening, and the particle size is larger than 5mm. Pebbles are particles with a particle size greater than 5mm formed by natural weathering, water flow handling, sorting, and accumulation. [0003] Recycled concrete is a kind of concrete prepared by replacing part of the natural coarse aggregate in ordinary concrete with recycled coarse ag...

AI Technical Summary

Problems solved by technology

These characteristics have an adverse effect on the strength of recycled concrete. Under the same ratio, the strength of recycled concrete is generally lower than that of ordinary concrete, and the strength is in an uncontrollable state, which affects its use.