Estudio comparativo entre un concreto convencional de 3000 PSI Y un concreto con agregado grueso a partir de 50%, 75% y 100% de RCD

Abstract

This investigation was initiated by sorting a sample of RCD (Construction and Demolition Waste) with a weight of (135.78) Kilograms. Which, subtracted from a structural remodeling developed in a domestic building in the neighborhood Quintas de las acacias in the city of Villavicencio - Meta; carried out this activity, only the concrete residues were taken as a coarse aggregate to produce different concrete mixtures in different dosages, where the coarse aggregate was replaced by RCD (50%, 75% and 100%) for a total of thirty-six (36) cylinders with ARGOS cement. The mechanical properties such as strength, modulus of elasticity and the Poisson ratio are determined by the compression stress tests and others. This was done by comparing these properties in order to establish the most optimal percentage of coarse aggregate from RCD with better characteristics. The coarse aggregate from RCD can be used in the construction industry as long as the parameters of the regulation are taken into account, as this material can be an adequate substitute for conventional due to the similar characteristics it contains. However, it is of utmost importance to note that the manageability of the paste with RCD when making the mixture is more complicated as its particles are heterogeneous. Although the main focus of this research was to analyze and test the behavior of the concrete with high percentages of coarse aggregate from RCD to find the optimal dosage and with better characteristics, the data showed that the dosage with the highest resistance in the three ages analyzed (14, 28 and 56 days) before an applied load is 50% RCD with values of 22.1 Mpa, 31.3 Mpa and 41.8 Mpa respectively, however, it is also important to note that its results were 5.98% higher than conventional concrete; although 100% of the conventional aggregate cannot be replaced by recycling, is a convenient option thanks to the reduction in its manufacturing cost in addition to its mechanical properties. As for the behavior evidenced in their deformations after applying an axial force the elasticity modules and the Poisson relation, demonstrate that the specimens when tested are kept in an elastic range and within the established parameters.