Análise de influência da adição de pó de pedra (riolito) em substituição da areia natural nas propriedades mecânicas do betão

Abstract

The present work makes a study of the substitution of the existent natural sand in the concrete for an alternative material: the stone Dust. It is notable that research related to stone dust for the development of concrete is constant, as it is a fundamental material for civil construction. Stone dust is a material that appears as a sustainable alternative in the manufacture of concrete. Stone dust is the material rejected in quarry crushing and its maximum diameter is less than 4.8 mm. Based on granulometric curves of this type of material, it can be classified as coarse crushed sand. Currently, stone dust is used as a raw material for the production of concrete blocks. In this work, the mechanical properties of concrete were evaluated with different percentages of stone dust. To achieve this objective, three types of concrete were produced: a reference containing coarse natural sand and gravel, concrete with the addition of sand and stone dust, together with coarse natural sand and gravel, and the third, concrete with the total replacement of coarse sand with coarse crushed sand.It is considered that the main objective of this research was fully achieved, as the feasibility of the mechanical resistance of concrete with the total and partial replacement of sand with stone dust was proven.