Avaliação da reatividade pozolânica do pó de rocha granítica

Abstract

Mineral additions are materials that can be added to the composition of concrete and mortar in order to improve their cementitious properties, such as workability and void filling. The cement construction industry is a major consumer of raw materials from non-renewable sources. However, the non-responsible exploitation of these resources leads to an environmental imbalance. In this context, the use of mineral additions in partial replacement of cement can be a direction for mitigating the environmental impacts caused by the productive sector. The mineral by-product is a powdery material coming from the crushing process in quarries and its purpose is still not very explored. In this work, the mineral by-product will be characterized and evaluated, aiming its use in the partial replacement of cement to produce mortar. The experimental methods will be divided into the following steps: material characterization, morphology analysis and evaluation of the by-product's pozzolanic potential. The material tended to show low pozzolanic reactivity, amounting to 116.91 Ca(OH)2/g, specific mass of 2.63 g/cm³ and moisture content of 1.19%. The results indicate the classification of stone dust as inert additions of granitic origin, pink granite filler.