Valorization of marble waste in the manufacture of concrete

Abstract

The building materials manufacturing industry generates a lot of waste and their landfill has many problems (including the place occupied by the storage sites, the importance of the costs and the impact on the environment). This industry does not pose problems only at the end of the life cycle of these materials. It is imperative to find means of recovery and reuse of these wastes and therefore to propose another alternative to the depletion of aggregate sources. The main objective of this study is to show technically the possibility of using the aggregates from the manufacture of marble as a substitute in hydraulic concrete. The article presents the methodology of study and characterization of marble scrap, as well as the different formulations of concretes; series of tests have been developed, with a constant W / C ratio for a variable recycled aggregate content. The study consists of analyzing the results obtained and its comparison with a control concrete (100% natural aggregates); the rheological properties in the fresh and mechanically hardened state of concretes with different proportions of aggregates from marble waste (25%, 50%, 75%, 100%). The results show that marble waste is ready to be used as substitute material.