Method for preparing fair-faced concrete by using recycled water in concrete mixing plant

Abstract

The invention discloses a method for preparing clear-water concrete by using recycled water from a concrete mixing plant. During the preparation, the recycled water from the concrete mixing plant is magnetized by a magnetization device, and the magnetized recycled water is used instead of ordinary tap water to be used with raw materials required for clear-water concrete. Mix to get fair-faced concrete. In the present invention, the recovered water from the concrete mixing plant is magnetized and used to replace tap water to prepare clear-faced concrete, which not only does not affect the quality of the product, but also improves the performance of the concrete.

Description

technical field [0001] The invention belongs to the technical field of concrete, and specifically relates to a method for preparing clear-faced concrete by using recycled water in a concrete mixing plant. Background technique [0002] With the development of society, the application of commercial concrete is becoming more and more extensive, and the demand is also increasing. However, many commercial concrete mixing stations produce a large amount of concrete waste slurry after cleaning concrete mixer trucks and pump trucks. The sand and gravel and waste slurry are separated by the sand and gravel separation equipment system. The separated sand and gravel can be reused for the production of concrete, but Since the separated concrete waste slurry has a high pH and contains a large amount of solids such as cement, it cannot be directly discharged into the sewer pipe, so it must be treated. However, in this environment where water conservation is scarce, the treatment and util...

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Problems solved by technology

[0003] At present, there are three main ways to deal with concrete waste slurry in concrete mixing plants: one is to filter out the clear water through the filter press, and the filtered water can be reused for producing concrete and cleaning mixer trucks and pump trucks, which solves the problem of filtered water Emission problem, but after the filter residue is formed into construction waste, secondary treatment is required; the second is to use multi-stage sedimentation tanks for sedimentation, and the recovered water after sedimentation is used to clean mixer trucks and pump trucks, and the sedimented residue is air-dried and then filled The disadvantage of this method is that the drying speed of the residue is slow, and a large-scale storage yard is required, and the generated residue construction waste also brings secondary treatment problems; third, because the waste slurry is directly used for the production of concrete without treatment, this method will It has an adverse effect on the strength of concrete. In order to increase the strength, the formula of concrete needs to be adjusted, which increases the production cost of concrete. At present, direct recycling is limited to the production of low-strength concrete below C15

In addition, the volume of low-strength grade concrete in the mixing plant is small, and there is still a large amount of waste slurry produced by the mixing plant every day, which cannot be consumed

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