ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Comparison of changes of basic parameters of asphalt caused by various additives

Lucia Hrušková, Michal Horńáček, and Pavol Daučík

Department of Petroleum Technology and Petrochemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovakia

E-mail: lucia.hruskova@stuba.sk

Abstract: This work presents a study on asphalt mixtures prepared with different kinds of additives: poly(styrene-co-butadiene-co-styrene), poly(ethylene-co-vinyl acetate), crumb rubber, fibers, zeolites and clays. The aim of this study was to determine the influence of inorganic dirt and fibers present in crumb rubber on the qualitative parameters of asphalt mixtures. The experiments showed that dynamic viscosity is the best criterion for assessing the effectiveness of the additives in asphalt mixtures. It was also found that fibers and inorganic impurities present in crumb rubber at low concentrations have a negligible effect on the characteristics of asphalt mixtures. This investigation is important in terms of determining the degree of crumb rubber devulcanization in crumb rubber-asphalt mixtures as higher crumb rubber devulcanization could bring the properties of such a mixture closer to those of asphalts modified by poly(styrene-co-butadiene-co-styrene) copolymers.

Keywords: crumb rubber – dynamic viscosity – modifier – filler

Full paper is available at www.springerlink.com.

DOI: 10.1515/chempap-2016-0010

Chemical Papers 70 (6) 793–800 (2016)