Implementación de bentonita tratada térmicamente como llenante mineral en una mezcla asfáltica MDC-19

Abstract

The production of mineral filler affects the environment because of the high energy consumption required to obtain it, reflected in the crushing of rocks and stone aggregates from quarries or rivers, causing deforestation, contamination of water sources, among other human impacts.The above supports the importance of this study, in which the future use of highly plasticized clay (considered a waste product in the excavations), thermal treatment as a substitute for mineral filler or hot mix asphalt, is intended. In the research, an industrial bentonite-type clay was used, characterized by X-ray diffractometry and X-ray fluorescence. This material was subjected to thermal treatments, process in which it was sought to eliminate undesirable engineering properties such as plasticity and the potential for swelling, to be subsequently used as a mineral filler in an hot mix asphalt (HMA). Marshall tests, indirect tensile strength test, resilient modulus, permanent deformation, fatigue test and evaluation of abrasion resistance (Cantabro test) were carried out on a dense hot mix asphalt (HMA-19), which used as mineral fillers, one of natural origin and bentonite (with and without heat treatment). The estimation of the significance in the results was obtained through an analysis of variance ANOVA with a 95% confidence level. The results of the present study were published in a Q1