Preparation method of recycled concrete based on house construction

Abstract

The invention discloses a preparation method of recycled concrete based on house construction, and belongs to the field of concrete. According to the preparation method of the recycled concrete based on the house construction, in the scheme, lubricating oil expands in a storage cavity and flows into gaps of a screening cylinder through high temperature generated during friction between concrete waste residues and the screening cylinder, and the probability of screening cylinder blockage caused by concrete blocks is reduced. A main motor is started, a fixed shaft is driven to rotate, the concrete blocks are stirred through a stirring rod and a cleaning plate, when the main motor drives the stirring rod to rotate, the concrete is better ground through grinding beads at the outer end of a grinding ring, and when the concrete is slowly solidified, heat is generated, heat expansion air bags are heated and expand, and T-shaped sliding rods are ejected towards the outer side. Meanwhile, the grinding beads are softened by heat, and the grinding beads are punctured through ejector pins on the outer sides of ejector plates, so that a cement retarder flows out and is mixed into the concrete, and the solidification speed of the concrete is effectively slowed down.

Description

technical field [0001] The invention relates to the field of concrete, and more specifically, relates to a method for preparing recycled concrete based on building construction. Background technique [0002] Recycled concrete means that waste concrete blocks are crushed, cleaned and graded, mixed with gradation in a certain proportion, partially or completely replaced by natural aggregates (mainly coarse aggregates) such as sand and gravel, and then added with cement, water, etc. According to the combination of aggregates, recycled concrete can have the following situations: all aggregates are recycled aggregates; coarse aggregates are recycled aggregates, fine aggregates are natural sand; coarse aggregates are natural crushed Stones or pebbles and fine aggregates are recycled aggregates; recycled aggregates replace part of coarse aggregates or fine aggregates. [0003] The recycled aggregate components include not only a small amount of stones separated from the mortar, so...

AI Technical Summary

Problems solved by technology

[0004] The shape and surface characteristics of the aggregate have an impact on the performance of the concrete. When the cubic or spherical particles have a smooth surface, it is beneficial to the fluidity of the fresh concrete, but the bond with the cement stone is poor. Compared with the natural aggregate, most of the recycled The surface of the aggregate is covered with mortar, so the surface is very rough and the specific surface area is large, which is good for improving the bonding with cement stone, but it is not good for the fluidity of fresh concrete, and it will increase the amount of cement

[0005] At present, when screening waste gas concrete, the irregular shape of concrete is easy to block the screening cylinder. When the waste gas concrete and cement cannot be fully mixed, the concrete is easy to solidify during mixing.

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