Recycled concrete screening device

Abstract

The invention discloses a recycled concrete screening device which comprises a barrel. An internal barrel is arranged in the barrel. Recycled concrete aggregate passes through a feeding hopper and a feeding opening in sequence to be fed into the internal barrel, a motor can be controlled by a controller to rotate so as to drive the internal barrel to rotate in the axial direction, so that steel balls in the internal barrel are driven to collide with the aggregate, and therefore the operation of rubbing down corners on the surfaces of the aggregate and removing hardened cement mortar on the surfaces of the aggregate is helped. A water injection pipe is arranged and used for injecting water into the internal barrel, and therefore the effect of washing the aggregate so as to remove the hardened cement mortar on the surfaces is achieved. Through the rotary centrifugal effect and holes in the side wall of the internal barrel, the aggregate of recycled concrete is screened out and slides outof a discharging opening through a partition plate, meanwhile, screened-out cement mortar or impurities can be filtered through filter holes in the partition plate, and therefore the functions of screening the recycled concrete aggregate and meanwhile further washing and separating the hardened cement mortar on the outer surfaces of the recycled concrete aggregate are achieved.

Description

technical field [0001] The invention relates to a recycled concrete processing device, in particular to a recycled concrete screening device. Background technique [0002] In construction engineering, the amount of concrete is the largest, and among several raw materials in concrete, the amount of aggregate ranks first. Recycled concrete refers to the waste concrete blocks that are crushed, cleaned, and graded, and mixed with the grade in a certain proportion. Mixing, partially or completely replacing natural aggregates such as sand and gravel, and then adding cement, water, etc. to prepare new concrete, and in the current relatively mature recycled concrete technology, the coarse aggregate of recycled concrete is mainly used to replace partially or completely Natural coarse aggregate, obviously, the development and application of recycled concrete can save the consumption of natural aggregate resources on the one hand, and reduce the pollution to the urban environment on th...

AI Technical Summary

Problems solved by technology

[0003] In the existing recycled concrete technology, the crushed recycled concrete aggregates have different particle sizes, which need to be screened to obtain particle sizes suitable for concrete mixing and preparation. However, recycled concrete aggregates often have rough surfaces, many edges and corners, and Contains a considerable amount of hardened cement mortar, which will inevitably lead to the problems of larger porosity and water absorption of recycled concrete aggregates compared with natural aggregates, which will affect the strength of recycled concrete, thus limiting recycled concrete, especially high-strength recycled concrete. Development and Application of Concrete

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