PERFORMANCE ASSESSMENT OF A SELF-COMPACTING CONCRETE WITH COARSE AND FINE RECYCLED AGGREGATE
Environmental protection and more sustainable human activities are two of the main goals faced by modern society. The reuse of wastes, framed within these objectives, directly affects the construction sector. The use of residues enables to reduce the consumption of natural resources and CO2 emissions released into the atmosphere because of the extractive activity, as well as to reduce potential landfills, thus contributing to a circular economy. Accordingly, this paper explores the development of self-compacting concrete made from high-quality recycled aggregates, obtained from the crushing of precast concrete elements. The replacement rates of the natural aggregate by the recycled aggregate were 100% for the coarse fraction and 50% for the fine fraction. Its validity for structural use is analyzed, both fresh and hardened. In addition, the importance of the limestone filler in the fresh rheology of the mentioned concrete and its impact in the hardened state are also evaluated.