ABSTRACT: Concrete is an essential material in construction and large companies have opted for industrialized it. For the preparation of industrial concrete quality is required to wash the concrete mixer trucks with great frequency, using potable water. Knowing the water crisis faced by Brazil in recent times, this work aims to reuse the water from these washes for making new concrete. The goal is to reduce the use of drinking water and give a correct allocation to the wastewater, which is currently a major problem for concrete producers industries, generating large costs with waste treatment before disposal.
After the performed aggregate’s characterization tests (grown and fine) and water collected according to current regulations in the company that makes industrial concrete. The tapered trunk rebate depending on water levels in manufactured concrete was analyzed. It appears that the fine aggregate is within the optimum zone for sand used in concrete. However, the grown aggregate is outside the usable area for concrete. For characterization of the fresh concrete the slump was used to measure workability test. All mixes met within the standard established with the same amount of water, demonstrating that not showed significant influences on the workability of the concrete using the concrete mixer truck wash water. All analyzed showed no significant differences in the workability and the mechanical strength. The tests show promise in the use of effluent analyzed for the production of a new concrete, it can be used 100 % substitution of potable water at effluent.
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