Analytical, morphological, and rheological behavior of sulphur-extended-binder

Gedik A., Lav A. H.

CANADIAN JOURNAL OF CIVIL ENGINEERING, vol.43, no.6, 2016 (SCI-Expanded) identifier identifier


Bituminous material is a limited natural resource mainly used in hot mix asphalt production. The high costs coupled with the large amounts required have been forcing pavement engineers to find cost effective alternative materials that can be used as extenders or partial substitutes. This prohibitive cost factor led this paper to focus on the utilization of abundant granular sulphur as an extender for the more expensive bituminous material. In this study, sulphur-extended binders were prepared by using a 50/70 grade bitumen and by increasing the amounts of granular sulphur as an extension up to a maximum 50% by weight. The samples were then exposed to short and long-term aging by performing the rolling thin film oven and pressure aging vessel tests. Aged and virgin samples were then further tested using analytical, rheological, and morphological testing methods. The promising results demonstrate that the sulphur-extended binder not only increases the performance of the neat bitumen, but can also lower overall costs.