Estudo da substituição do agregado miúdo por argila expandida no concreto estrutural

Abstract

The study of materials that improve the properties of concrete, the most widely used building material in the world, has increased considerably. The use of light aggregates, such as expanded clay, has become a viable solution to reduce the aspects described by concrete with used aggregates. In this way, this work has as main objective to analyze the influence of the content of substitution of the kid by expanded clay in the mechanical properties of a structural concrete. For this, choose to work with mass dosage 1: 1.51: 1.72 (cement, sand and gravel) for five different strokes: 0%, 25%, 50%, 75% and 100% expanded clay instead to the conventional fine aggregate (sand). Characterization tests were performed on the materials used, consistencyin the fresh state and chemical and mechanical attributes in the state resistant to concrete. The results showed that all the traces reached the resistance above 20 MPa, being considered as applied concrete, and the TR75 and TR100 obtained specific masslessthan 2000 kg / m³, beingclassified as light concrete. Statistical tests were carried out with ANOVA, which demonstrated that expanded clay interferes with the characteristics of the concrete and Tukey test that identifies the features with higher clay contents that were more influenced by the substitution of fine aggregate. Finally, it is possible to conclude that the substitution of fine aggregate by expanded clay in choosing concrete, in line with natural aggregates, and also in light concrete sheets, is a promising alternative for the production of concretes with applied dimensions.