Utilização combinada de resíduo de concreto e resíduo de cerâmica vermelha como agregado graúdo em concreto

Abstract

Over the years, the consumer market has been modernized, in a sagacious search for the new, thus making the civil construction industry more demanding. For this, the structures are in constant demolition, renovation and construction, thus there is a great demand and waste in construction materials. However, waste is often not properly disposed of, resulting in damage to the environment. Examples of this are the consumption of too much concrete, where it generates its Concrete Waste (CW) and the Waste generated by the consumption of Red Ceramic (RCW), which is popularly used in Brazil. In this way, a solution in order to minimize the problems caused by the improper disposal of CW and RCW, proposes its reuse in the making of concrete, thus enabling a more sustainable bias to civil construction, as it offers an adequate adequate waste. With this, the experimental work procedure aims to correct the partial substitution of conventional coarse aggregate for recycled aggregate of CW and RCW in the mechanical properties and durability of a conventional concrete in the following substitutions: 100% G1, 75% G1 25% CW, 50% G1 50% CW, 50% G1 40% CW 10% RCW, 50% G1 25% CW 25% RCW. The reuse of the CW and RCW was carried out through crushing, using a jaw crusher, of discarded material in the Materials and Civil Construction Laboratory of the Civil Engineering course at UNIPAMPA. Through crushing, a material was added, whose granulometric curve was adapted according to normative requirements for the optimum type 1 crushing curve. The tests performed are: water absorption and voids index, simple compression resistance, elasticity module, tensile strength by diametrical compression and absorption by capillarity. The results found indicate an improvement in the resistance to medium compression when red ceramic is incorporated, as well as a decrease in water absorption and voids index, due to the packaging effect generated by the breaking of some ceramic aggregates during the mixing process. On the other hand, when incorporating only concrete waste, these results were not so satisfactory.