Laboratory Investigation of Crumb Rubber in Dense Graded Asphalt by Wet and Dry Processes

Construction and Building Materials 2021
Artūrs Riekstiņš, Jānis Baumanis, Jānis Barbars

This article presents the perspective of the use of crumb rubber (CR) from the end-of-life tyres in dense-graded asphalt mixtures by the wet process high viscosity and a dry process in which the purpose of CR was to substitute aggregates. For the wet process CR modified binder was produced by adding 25% of rubber by the mass of the neat bitumen. Added CR content in the dry process was 41% by the mass of neat bitumen. The mixture made by dry process showed a weak internal cohesion and consequently poorer mechanical properties as reference mixtures. On the other hand, the mixture made by the wet process showed significantly better low-temperature and fatigue properties as reference mixtures.

Keywords
Riepu gumija; siltā asfalta tehnoloģija; transportlīdzekļu nolietotās riepas; bitumena modificēšana
DOI
10.1016/j.conbuildmat.2021.123459
Hyperlink
https://www.sciencedirect.com/science/article/pii/S0950061821012198?dgcid=author

Riekstiņš, A., Baumanis, J., Barbars, J. Laboratory Investigation of Crumb Rubber in Dense Graded Asphalt by Wet and Dry Processes. Construction and Building Materials, 2021, Vol. 292, Article number 123459. ISSN 0950-0618. Available from: doi:10.1016/j.conbuildmat.2021.123459

Publication language
English (en)