Estudo da viabilidade da substituição parcial do agregado miúdo por agregado miúdo reciclado de pet em concretos convencionais

Abstract

The use of recycled materials generates numerous economic and environmental benefits, as they minimize the extraction of natural resources, as well as reduce pollution and expenses. The objective of this research was to verify the influence of the partial replacement of natural sand on conventional concretes by small recycled PET aggregate with respect to its mechanical properties (resistance to axial compression and tensile strength by diametral compression), in the control ages of 7 and 28 days. The experimental program was divided into two distinct stages. In the first step, a dosage study was developed using the IPT / EPUSP method. From the elaboration of the dosage diagram, a trait with intermediate cement consumption was determined, to allow the construction of a concrete of normal performance. The second stage of the experimental program corresponded to the moldings of the concretes of the intermediate trace and the execution of the mechanical tests. Part of the concretes was made with partial replacement of the small aggregate by recycled aggregate of PET in the contents of 10% and 15% (substitution in volume), and some of the concretes were cast with 100% of natural kid's aggregate, to serve as reference. From the results obtained in the mechanical tests, a statistical analysis was carried out, where it was verified that there was no significant difference between the results of concrete with substitution of PET in the contents studied (10% and 15%) and their respective references.