Análise da curva tensão versus deformação do concreto laterítico.

Abstract

As a way to reach the growing demand for housing, the study of new materials for employment in the concrete comes to assist civil construction in the replacement or complementation of raw materials that are in scarce, such as large aggregates of granite origin in some regions of the Brazil. Thus, the use of laterite concretions in concrete can help reduce costs and reduce the demands of usual coarse aggregates. So, the study of its properties and the structural behavior of the concrete is necessary for its application in works with safety. In this research, the behavior of the stress strain curve for lateritic concretes was studied at 7 and 21 days in order to study their characteristics and to obtain structural dimensioning parameters. Thereby, it was used as reference a concrete with compression strength of 25 MPa and 150mmx300mm specimens were molded to obtain the stress strain curve as established in ABNT NBR 8522: 2008. The specimens presented a characteristic behavior of brittle material as expected for the concrete, with values of modulus of elasticity close to those indicated by analitical methods. The parameter εc2 of the strain strain curve obtained was 1.44‰ and thus presented a lower value than that established in ABNT NBR 6118: 2014 of 2,00‰. So, the concrete studied can be used as structural concrete because it presents resistance and stress versus strain curve as expected.