Making 9 sustainable
Another solution is to use skips or moulds, the concrete returns being simply emptied, then left there to set. In the case of skips, the concrete is crushed. In the mold sector, the concrete is then marketed in the form of “Lego”, in particular for earthwork reservoirs. Last solution, mechanization. This consists of setting up a recycler, which will be fed by dirty water from washing the mixer, by concrete returns from washing the concrete pump and cleaning the process area. The waste is then separated from the water. Sand fines and cement residues are reused in the production process in the form of charged water stirred in a basin by an agitator. This agitation keeps the materials in suspension.récupération de béton The process consists of going through a scale, in order to load and reintegrate the water into the production circuit. If necessary, a clear water supplement is made automatically, depending on the formulation. For formulations excluding contaminated water, such as concretes under NF standard, these pass through a filter press which makes it possible to obtain clear, filtered water. 2 – Why opt for the “automated recycling system”? The automated recycling system makes it possible to separate the aggregates from the loaded water. It can be adapted to customer needs, in size and processing volume, as well as in accessories. For example, the filter press which separates the sludge from the water and compresses this material into cakes. This produces clear, filtered water that can be used in production, without any limitation. And we recycle concrete production waste. 3 – How does it work? Back at its base, the spinning top approaches the washing station. The cleaning of the tank is carried out with a specific cane. The quantity of water is defined according to the quantity of material in return. The goal is to drown the concrete, to obtain a grout that is easier to introduce into the system. The washing water from the power station, as well as the cleaning of the concrete pumps and the washing returns from the conveyor belts are discharged into the treatment unit via a removable funnel. Then, they are lifted via an Archimedean screw or a paddle wheel. For their part, returns from anhydrite screed must follow a specific path, their waters not having to be mixed with those intended for cement-based formulations. Passing through the specific recycler allows the charged water to be sent to a dedicated basin. In general, sand and cement fines are collected in a cut of less than 200 μm. Driven by the water in a dedicated basin, the whole remains in agitation thanks to a propeller and a shaft propelled by a geared motor. This sludge mixing system prevents the cement from setting. And eliminates the tedious activity of mechanical cleaning. The agitation basins can take two forms: a first concrete and a second, metallic. In this case, the basins are placed on the ground, they can be mobile and be integrated into a complete and transportable washing platform.