Estudo da utilização da escória de alto forno como agregado graúdo em concretos fabricados em Marabá

Abstract

This study presents an investigation on the use of blast furnace slag used ascoarse aggregate in concrete with compressive strength of 20 MPa, manufactured by a company of concreting services in the city of Marabá, Pará. Physical characterization was performed on aggregates (sand and slag), and it was observed that they were in compliance with the standards’ rules, with regards to the parameters investigated in this study, with the exception of particle size and content of pulverulent material of the slag. It was shaped up to 30 test specimens of concrete for testing of axial compression. The concrete reached at 28 days of age a compressive strength of 20, 81 MPa, favorable and important parameter for optimum performance and durability. Despite of some differences regarding to the standards, slag recycling has potential for the use as coarse aggregate to produce concrete.