ANALYSIS OF MICROSTRUCTURAL PROPERTIES OF CONCRETES RECYCLED WITH CDW BY X-RAY DIFFRACTION

Reference	Presenter	Authors (Institution)	Abstract
09-041	Luisa Andreia Gachet-Barbosa	Gachet-Barbosa, L.A.(Universidade Estadual de Campinas); Oliveira, A.G.(Universidade Estadual de Campinas); CANDIAN, J.(Universidade Estadual de Campinas); Vilhena, M.(Universidade Estadual de Campinas); Alves, S.M.(Universidade Estadual de Campinas); Lintz, R.C.(Universidade Estadual de Campinas);	The construction industry absorbs large quantities of non-renewable natural materials such as natural sand and gravel, limestone and clay, and generates large-scale Construction and Demolition Waste (CDW). These residues cause serious environmental impacts mainly when accumulated in large urban centers. In an attempt to minimize these impacts, this work presents a study on the use of recycled aggregates in place of natural aggregates in concrete production. Different concrete compositions were molded without and with recycled aggregates. The concrete specimens, after wet curing, were submitted to the following tests: axial compression, diametral compression traction, scanning electron microscopy (SEM) and characterized microstructurally by SEM and X-ray diffraction. The results obtained in the mechanical tests classified the concretes as structural according to the specifications of Brazilian standard ABNT NBR 6118: 2014, showing that the use of recycled aggregates for the traits studied is feasible.
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