Long-term performance of SMA mixtures added with crumb rubbers in dry process

Zhaoxing Xie, Junan Shen

Research output: Contribution to book or proceedingConference articlepeer-review

13 Scopus citations

Abstract

Crumb rubber, made from scrap tires, has been introduced into the production of different types of hot-mix asphalt (HMA) in either wet or dry process. In the wet process, the crumb rubber and binder are completely mixed to form asphalt rubber (AR), which is then mixed with aggregates in a drum. In the dry process, the crumb rubber is mixed directly with aggregates in the drum to produce an HMA called rubberized asphalt mix. In this paper, the long-term performance of three years in service testing pavement of stone matrix asphalt (SMA) pavements with crumb rubber added in dry process was examined through a visual inspection and laboratory testing on cored samples. The results indicated that the distresses of cracking, rutting, raveling, bleeding, pushing, and potholes were not found in the rubberized PEM-wearing layer under which rubberized SMA and polymer-modified asphalt cement (PMAC) SMA was used, i.e., the rubberized and control PMAC SMA underlayers had similar effect on the performance of the surface PEM. The rubberized SMA core samples taken from the field had slightly higher stability and lower flow than control SMA ones.

Original languageEnglish
Title of host publicationAirfield and Highway Pavement 2013
Subtitle of host publicationSustainable and Efficient Pavements - Proceedings of the 2013 Airfield and Highway Pavement Conference
Pages1145-1155
Number of pages11
DOIs
StatePublished - 2013
Event2013 Airfield and Highway Pavement Conference: Sustainable and Efficient Pavements - Los Angeles, CA, United States
Duration: Jun 9 2013Jun 12 2013

Publication series

NameAirfield and Highway Pavement 2013: Sustainable and Efficient Pavements - Proceedings of the 2013 Airfield and Highway Pavement Conference

Conference

Conference2013 Airfield and Highway Pavement Conference: Sustainable and Efficient Pavements
Country/TerritoryUnited States
CityLos Angeles, CA
Period06/9/1306/12/13

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