Mechanical Properties of concrete by reused coarse aggregate with substitution of different percentages instead of natural aggregate and incorporation of Glass fiber

Abstract

Waste recycling is an option to mitigate the environmental impact resulting from the significant amount of debris generated by the productive activities of the construction. Thus, the aim of the research work to evaluate the use of Recycled Coarse aggregates (RCA) instead of natural coarse aggregate (NCA) in concrete ingredients with 30 MPa compressive strength. The experimental program began with the physical and particle size characterization of the Recycled Coarse aggregates (RCA), and subsequent comparison with the properties of the natural coarse aggregate (NCA). Based on the knowledge of these properties, the production stage began of concretes. Different procedures and literature have been studied in order to achieve the strength of concrete up to 30Mpa by incorporated glass fiber (2 % by addition of cement). It was also the influence of the use of different contents (0, 10%, 20%, 50%, and 100%) of Substitution of natural coarse aggregate by the recycled coarse concrete aggregate in the properties of the fresh and hardened state of concrete. Regarding the strength, parameters increased gradually proportional to the amount of RCA in the concrete from 10 to 20% and decrease strength to the amount of RCA in the concrete from 50 to 100% Substitution of natural coarse aggregate (NCA) in concrete