CONCRETO AUTOADENSÁVEL COM BAIXO CONSUMO DE CIMENTO COM ADIÇÃO DE RESÍDUO DE POLIDORA CERÂMICA

Abstract

Self-compacting concrete (SCC) must have high fluidity, resistance to segregation and ability to pass. However, to achieve these characteristics it is necessary to consume more binder and additions, generating a higher cost in the manufacture of concrete. In an attempt to contribute to the reduction of the manufacturing cost, use of natural resources and to reduce environmental impacts, the present work aims to analyze the properties in the fresh and hardened state of the Self-compacting Concrete with Low Cement Consumption (SCCLCC) with the addition of ceramic polisher residue. For the test methods, 3 types of dosages were analyzed, 32%, 33% and 40% of the paste volume, respectively. The studied concretes present cement consumption between 434 and 347 kg / m³, presenting a reduction of up to 25% in cement consumption in relation to the reference concrete. The mechanical properties analyzed were axial compressive strength, tensile strength by diametrical compression and dynamic elastic modulus at the ages of 3, 7, 28 and 91 days. For the tests in the fresh state, the tests were performed: slump-flow test, V-funnel and L-box, in which it presented results that comply with ABNT NBR 15823: 2017. It was found that, regardless of the percentages of incorporated ceramic polisher residue, there was an improvement in the mechanical properties of the concrete, even with the reduction of cement consumption. Bearing in mind that the SCCLCC with the addition of ceramic polisher residue presented satisfactory results and reduced cement consumption, it is concluded that the SCC is more advantageous, as it reduces the cost and environmental impacts without compromising its properties.