Disposal of concrete leftovers and residuals can be based on the following.
Concrete residue common treatment:
1, in the process of concrete production and supply, due to inaccurate demand dosage of the construction unit, resulting in the supply of concrete more than the actual dosage, or for various reasons has been supplied to the concrete can not be carried out construction. After this situation occurs, the remaining concrete is more, the mixing plant generally take to the concrete transfer for processing. However, in special circumstances, the concrete can not be resupplied or there is no way to resupply, the concrete can only be low-priced monopoly, resale can only be dumped to deal with. In the process of dumping concrete, the remaining concrete will seriously pollute the environment, and if the dumping place is within the factory area, it will be time-consuming and labour-intensive to remove and dispose of the concrete at a later stage.
2、Multi-stage sedimentation tank is set up in the concrete mixing plant, and circulating water is used to brush the truck. In this case, a small amount of concrete is diluted with recycled water to achieve the separation of gravel and cement slurry, and the mixture is dumped in the sedimentation tank, where gravel and cement slurry are analysed through multi-stage sedimentation. Although this method uses recycled water and saves water resources, the separation effect of sand and gravel is poor, the cement slurry is mixed in sand and gravel, and the precipitated sand and gravel can not be reused, but can only be dug out by the forklift equipment to form a waste residue, which is dumped and disposed of. This method not only pollutes the environment, but also wastes valuable mineral resources, and at the same time, the process of digging will cause damage to the forklift and other mechanical equipment.
3, the mixing plant using gravel separator equipment, the remaining concrete using a separator for separation. The use of this method can be the remaining concrete sand and gravel from the cement slurry completely separated, after the separation of sand and gravel as raw materials can be used back to the concrete production, saving resources. However, after the separation of sand and gravel by this method, the cement slurry still needs to be precipitated and processed, which cannot be reused, and the sewage formed contains a large number of suspended particles, which may cause obstruction to the drainage system of the concrete mixing plant after long-term accumulation. At the same time, in order to ensure the precipitation effect, the precipitated cement slurry needs to be dug out from the precipitation tank regularly, and the dug out cement slurry will cause strong pollution to the environment. concrete batching plant b concrete mixer
