Investigating the performance of rubberised binders used in Iran based on multiple stress creep recovery and performance grading systems

This study investigated the rheological properties of three original and eight rubberised binders based on the performance grading (PG) and multiple stress creep and recovery (MSCR) systems. The results were compared with 8 out of the 13 performance grade binders essential for specific climatic zone...

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Bibliographic Details
Published in:Road materials and pavement design 2018-05, Vol.19 (4), p.803-818
Main Authors: Amini, Amir, Ziari, H., Goli, Ahmad
Format: Article
Language:English
Subjects:
Creep recovery
Evaluation
Grading
Mechanical properties
multiple stress creep and recovery (MSCR)
performance grading
Rheological properties
Rubber
rubberised binder
traffic condition
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Summary:This study investigated the rheological properties of three original and eight rubberised binders based on the performance grading (PG) and multiple stress creep and recovery (MSCR) systems. The results were compared with 8 out of the 13 performance grade binders essential for specific climatic zones in Iran. The other five were not available and, therefore, were not considered in this study. The results of performance grade tests showed that crumb rubber modification (CRM) improved the physical and mechanical properties of rubber-modified binders. In addition, the base binder type showed a meaningful effect on high- and low-temperature quality of the CRM binder. Adding CRM resulted in an increase in the recovery percentage (R) and a decrease in the non-recoverable compliances (J nr ) in the MSCR test. The results of designated grades based on the PG and MSCR systems proved that rubberised binders fully covered the required PGs in Iran, while they did not completely satisfy the traffic-level requirements based on the MSCR method.
ISSN:1468-0629
2164-7402
DOI:10.1080/14680629.2016.1274676