Caracterización de las Propiedades Mecánicas de Adoquines de Concreto con Adición de ResiduodDe Caucho Reciclado Producto de Llantas Usadas

Abstract

Each year increases the number of vehicles in the country, this increase the vehicle fleet directly affects the problem of accumulation and inadequate recycling of used tires. To solve this problem, through the years they have developed politics of environmental protection, including systems for sustainable construction. In this field used tires were converted to CGR (grain recycled rubber) and were used initially as an alternative fuel in cement kilns and, subsequently, to a lesser extent in the production of hydraulic concrete and concrete asphalt paving. Given this background and finding new uses for the GCR is consistent thinking in the study of the physical and mechanical properties resulting from the production of concrete pavers with additions of GCR, so that they can be used in construction articulated pavement. This document shows the results obtained either partly replace fine aggregate in volume by GCR in the development of concrete pavers. Four types of mixtures, the first as reference mixture without addition of GCR, it were prepared the second replacing 5% of the fine aggregate by the same amount by volume of GCR, the third and fourth in the same manner but replacing 10% 15% respectively. This properties were evaluated: water absorption and density, abrasion resistance and resistance to flexo-traction, the execution of these tests are performed when the cobbles reached their hardened state 28 days. It was concluded that because of the low percentage of adhesion between the GCR and concrete paste, the flexo-traction decreases, however mixtures with replacement of 5% and 10% meet resistance requested in (NTC 2017, Standard technical Colombian, 2004). The density was also decreased with the substitution of GCR, while the water absorption and abrasion resistance is similar to behaved reference mixture.