Comparación del comportamiento de un cemento asfáltico modificado con desecho de pebd y otro modificado con desechos de pvc

Abstract

This article analyzes the positive and negative aspects of the modification of a CA 80-100 asphalt cement with the addition of two plastomeric polymers, such as PVC and LDPE, thus forming the MDC-2 asphalt mixture, by means of scientific studies carried out in Colombia, in the cities of Bogotá and Medellín, whose general and rheological characteristics are contrasted based on the tests established by INVIAS. The results obtained allowed identifying that the addition of these plastomeric polymers increases and improves the chemical, mechanical and rheological properties, as well as allowing the reuse of waste that can be used for the elaboration of these asphalt mixtures; However, the asphalt mixture modified with PVC shows a better mechanical resistance, a higher resilient modulus, and a higher resistance to deformation under load cycles; this denotes that the feasibility of using this polymer in asphalt cements gives it a lower susceptibility to the commonly found failures, allowing an increase and a prolongation of the useful life of the pavements developed with this asphalt mixture modified with PVC waste. Unlike the asphalt mix modified with LDPE, which although it shows an improvement in the same evaluated aspects of the PVC mix, with respect to a conventional asphalt mix, it does not achieve a better performance than the PVC modified mix.