ANALYSIS OF THE RESISTANCE TO COMPRESSION OF BLOCKS PRODUCED WITH IRON ORE DAM TAILING

Abstract

Given the various problems existing in the iron ore industry, the generation of tailings from the mining process stands out. This waste is characterized as a material of low economic added value and brings risks and impacts to society, being its reuse according to sustainable premises a great challenge. The objective of this experiment was to analyze the axial compressive strength of concrete produced with the partial replacement of fine aggregate by iron ore tailings (RMF) and used in the manufacture of blocks for pavements. Four specimens (CP’s) with a reference mix and 12 CP’s with the same mix were made, however, 5%, 10% and 15% of fine aggregate were replaced by RMF. The CP’s were subjected to the axial compressive strength test at 28 days and, in the comparative analysis in relation to the specimens made with the reference concrete, a decrease of 3.0% in strength was obtained for the replacement scenario of 5%, an increase of 9.1% in strength for the 10% scenario and a decrease of 2.7% for the 15% scenario, thus signaling the potential for using RMF in the production of concrete for the
manufacture of blocks for floors.