Determinación de parámetros físico-mecánicos y de durabilidad en concreto reciclado con residuos de construcción y demolición (RCD)
Remolina Durán, Jesús Guillermo
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AbstractThe construction sector worldwide represents one of the main activities in all society and which in turn represents a sizable percentage of the generation of tons and tons of waste that are not adequately treated and therefore generate a high impact environmental damage. The use of Construction and Demolition Waste as aggregates for concrete contributes one of the great innovative ideas of recent decades that mitigate this damage and bring about better environmental development. The objective of this work is to determine and evaluate the physical-mechanical parameters of concrete mixtures whose natural coarse aggregate is replaced in different percentages by recycled aggregates obtained from the processing of hydraulic concrete demA2olition waste from a roadway in the city of Barranquilla. Three (3) distinctive designs were carried out, replacing 0%, 50% and 100% of the natural aggregate by recycling. Subsequently, the properties of each of the materials for the preparation of the mixtures, such as density, absorption, granulometry, relative humidity and specific gravity, were analyzed and evaluated to evaluate and compare their influence on the behavior of fresh and hardened concrete. Likewise, with these materials, the three concrete mixtures were made with different percentages of replacement to manufacture the specimens to perform compression tests in cylinders and flexure tests in three points in beams, for both with curing days of 7,14 and 28. The analysis of results was carried out by means of tables and graphs, together with different statistical and numerical methods to find correlations between the different variables analyzed and thus be able to reach a clear position regarding the objective of the work and the researchers found worldwide. In addition to determining the feasibility of using recycled concrete with RCD aggregates in low transit or other rigid pavement structures.