Effect of Polyethylene Grafted with Maleic Anhydride on Asphalt Properties
Publication: Journal of Performance of Constructed Facilities
Volume 28, Issue 4
Abstract
Low-density polyethylene (PE) was grafted with maleic anhydride (MAH) in solution, which was proved by the infrared (IR) spectrum test result. The grafting ratio peaked at 3.3% as the grafting temperature maintained at 90°C. Compared with the PE-modified asphalt, approximately a 5°C increase of the softening point of the PE-MAH–modified asphalt was observed. Once the dosage of the PE-MAH was higher than 3%, the penetration index of the PE-MAH–modified asphalt was considerably enhanced, whereas its equivalent breaking point was declined radically. In addition, the elastic recovery test supports that the PE-MAH–modified asphalt exhibits a superior capacity of recovering deformation than PE-modified asphalt. The performance grade (PG) test results show that PE-MAH–modified asphalt is preferable to PE-modified asphalt both at high temperature and low temperature. The rutting test results of AC-13 verify that PE grafted with MAH contributes to the higher temperature stability and the lower displacement.
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Acknowledgments
The authors greatly appreciate the financial support of the Catastrophic Prophylaxis and Treatment of Road Traffic Safety Engineering Research Center of Education Ministry, China (kfj110301). The authors also appreciate the financial support from Hunan Provincial Natural Science Foundation of China (No. 14JJ2078).
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© 2014 American Society of Civil Engineers.
History
Received: Sep 27, 2012
Accepted: Sep 17, 2013
Published online: Sep 19, 2013
Published in print: Aug 1, 2014
Discussion open until: Oct 20, 2014
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