Estudo comparativo entre as propriedades mecânicas do concreto produzido com brita basáltica e seixo rolado

Abstract

The coarse aggregate constitutes a large volume in concrete, and its physical and chemical characteristics influence the properties of concrete, both in the fresh and hardened states. The supply of aggregates in the market is directly related to regional availability, with transportation costs being a major influencing factor in the final cost of the aggregate. Thus, in the case of Barra do Garças - MT, where the availability of crushed coarse aggregate, whether of basaltic or granitic origin, is limited, the use of rounded pebbles as coarse aggregate for concrete production is common. In this context, the present research aimed to analyze the influence of crushed basaltic aggregate and rounded pebbles on the mechanical properties of concrete. For this purpose, the characterization of coarse aggregates, concrete mix design study, and production of cylindrical test specimens were carried out, which were tested for compressive strength and modulus of elasticity after a curing period (28 days). The results indicated that, statistically, the variation in the type of coarse aggregate did not exert a significant influence on the compressive strength and modulus of elasticity of conventional concrete.