A kind of waste concrete coarse aggregate preparation method

Abstract

The invention relates to the field of recycled aggregates, in particular to a waste concrete coarse aggregate preparation device and method comprising a crushing box, a dust removal tank and a immersion pool. The outer wall of the bottom of the box is welded with a hopper, the inner wall of the bottom of the crushing box is connected with a motor through bolts, and the output shaft of the motor is connected with a driving pulley through a flat key, and the inner wall of one side of the crushing box rotates A cam is connected, and a driven pulley is welded on one side of the outer wall of the cam, the driving pulley and the driven pulley are connected through a belt drive, and a push plate is slidably connected to one side of the inner wall of the crushing box, and the push plate is Two push rods are rotationally connected on the bottom outer wall of the board. The beneficial effect of the present invention is that, by performing surface treatment on the cleaned finished coarse aggregate, the density of the coarse aggregate is effectively increased, so that the strength of the coarse aggregate is improved, shrinkage and creep are reduced, and the durability is greatly improved.

Description

technical field [0001] The invention relates to the field of recycled aggregates, in particular to a device and method for preparing waste concrete coarse aggregates. Background technique [0002] Recycling waste concrete as recycled aggregates and applying it to the preparation of new concrete, that is, recycled concrete technology, can not only effectively recycle resources, but also solve some environmental problems, and has obvious social, economic and environmental benefits. [0003] However, in the current domestic production process, the cement mortar attached to the waste concrete cannot be effectively separated, and the impurities contained in the waste concrete cannot be effectively removed. The recycled aggregate produced by this process has low density and high water absorption. , high void ratio and mud content, resulting in low strength, large shrinkage and creep, and poor durability of recycled concrete, which cannot be applied to structural concrete. Therefo...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a waste concrete coarse aggregate preparation device and method to solve the problem of low density of recycled aggregate, high water absorption, high void ratio and high mud content in the background technology, resulting in low strength of recycled concrete , large shrinkage and creep, poor durability, can not be applied to the problem of structural concrete

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