Abstract

This paper presents the results of an experimental investigation carried out to study the effects of cement content on the mechanical and abrasion resistance of recycled aggregates concrete. Four series of mixtures with cement content 300, 350, 400 and 450 kg/m³ were formulated. In each series, natural coarse aggregate were totally replaced with recycled aggregate that allows obtaining two types of concrete: natural aggregates concrete and recycled aggregates concrete. Compressive strength, splitting tensile strength, modulus of elasticity and abrasion thickness loss were determined for both recycled aggregates concrete and natural aggregate concrete. The results show that as cement content increased, mechanical properties of recycled aggregates concrete also increased. It was observed that for cement content upper than 300 kg/m3, the difference between mechanical properties of natural aggregates concrete and recycled aggregates concrete was lower than 7%. Furthermore, for the same water-cement ratio, this difference is not significant. Correlation between mechanical properties of recycled aggregates concrete and abrasion resistance were proposed.

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