Reuso de água e resíduos gerados pela lavagem de caminhões betoneiras: análise do efeito na resistência à compressão de concreto usinado

Abstract

The objective of this study is to analyze the strength of concrete compression and its possible effects on water reuse and waste washes of concrete mixer trucks. The literature review on the proposed subject was studied and discussed in countries like Greece, Taiwan, Germany, Italy, Singapore and others, which served as support and reinforcement for this work. The method for analyzing the compressive strength was compared between the control sample (standard stroke 30 MPa) and samples with different compositions. The result of each sample was different depending on their composition, however, it can be stated economic gain on the order of 20,21 R$/m3, in addition to the compressive strength is greater than 90% of the control sample. The samples were analyzed by DRX, MEV and EDS showed that there was no synthesis of new mineral, only small amounts (lower than the detection limits of the DRX method) dissolved alumino-silicates and quartz which have been synthesized into new mineral crystalline, which can be assigned as amorphous substances in sol-gel state. With this result it was observed that the reuse of the concrete mixer trucks washing water does not interfere with the compressive strength of new concrete, as well as the washing residue which presented no different element of the compound in cement, does not interfere with the compressive strength new concrete, provided that control of the water present.