Comportamento mecânico de resíduos beneficiados da construção e demolição utilizados na fabricação de concreto e estabilização de solos

Abstract

This study reviews an analysis of the mechanical characteristics of construction and demolition waste (CDW), a central material recovery facility from Petrolina/ PE, with the objective to evaluate the waste processing to use in the produce of concrete and soil stabilization. Initially, tests were performed to characterize the waste materials and the con-stituents of the concrete. Then, three traits were measured for the production of concrete, with a dash to the reference concrete and two strokes for concrete replacements of natural aggregate by recycled aggregate in the proportions of 50% in one stroke and 100% in the other trait . In total it was made 15 speci-mens for each trait and the same dimensions of the concrete for reference, to-taling 45 specimens produced. Were conducted destructive testing (compres-sive strength and diametral tensile) and nondestructive (ultrasonic and rebound hammer). Also were produced two concrete beams, one reference concrete and other concrete with 100% replacement of natural aggregate by aggregate recy-cled for bending tests on beams. Subsequently, were evaluated the geotechnical behavior of the waste for use as soil containment works through testing particle size, limits, compaction, CBR and edometric being tested and valued the behavior of each material, and the RCD natural ground reference of the Alto do Reservatório and the mergers un-dertaken, in proportions of 25% of soil more 75% of RCD (mixture 1), 50% of soil more 50% of RCD (mixture 2) and 75% of soil and 25% of RCD (mixture 3). With these results, we evaluated the physical and mechanical material of this research, the correlations made between destructive and non-destructive test-ing of concrete made and analyzed the behavior of the waste for use as soil containment works. It can be concluded from the results of the analysis that concretes produced with the waste reaches average resistance, and may be used to produce concrete with non-structural function. And for use in soil stabili-zation, the residue can be used in road construction, as reinforcing material for subgrade, primer coating and the subfloor.