TY - GEN
T1 - Long-term performance of SMA mixtures added with crumb rubbers in dry process
AU - Xie, Zhaoxing
AU - Shen, Junan
PY - 2013
Y1 - 2013
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84887367775&partnerID=8YFLogxK
U2 - 10.1061/9780784413005.096
DO - 10.1061/9780784413005.096
M3 - Conference article
AN - SCOPUS:84887367775
SN - 9780784413005
T3 - Airfield and Highway Pavement 2013: Sustainable and Efficient Pavements - Proceedings of the 2013 Airfield and Highway Pavement Conference
SP - 1145
EP - 1155
BT - Airfield and Highway Pavement 2013
T2 - 2013 Airfield and Highway Pavement Conference: Sustainable and Efficient Pavements
Y2 - 9 June 2013 through 12 June 2013
ER -