Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 241, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2020.118017
Keywords
Road engineering; New warm mix additive; Asphalt performance; Reasonable dosage; Water stability
Categories
Funding
- National Natural Science Foundation of China (NSFC) [51008031]
- Provincial Natural Science Foundation of Anhui [1908085QE217, 1908085MF207]
- Key project of Natural Science Research of Anhui Provincial Department of Education [KJ2018A0668]
- Open Fund of National Engineering Laboratory of Highway Maintenance Technology (Changsha University of Science Technology) [kfj180108]
- Open Fund of Key Laboratory of Road Structure & Material Ministry of Transport (Chang'an university) [300102219523]
- Nantong Science and Technology Project [JC2018096]
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To confirm the reliability of self-developed ZYF-1 warm mix additive and provide some references for the promotion and application of ZYF-1, the conventional performance test and Strategic Highway Research Program (SHRP) test of SK90# asphalt and SBS modified asphalt containing ZYF-1 were conducted. The commonly used warm mix additives of Sasobit and Aspha-min were also tested. Meanwhile, the splitting test and Cantabro test of warm mix asphalt mixture before and after freeze-thaw cycles were conducted to evaluate the long-term water stability. The beam fatigue test and Wheel Tracking test were also carried out to verify other road performance of asphalt mixture with ZYF-1. The results show that ZYF-1 greatly improves the low temperature property of asphalt and has little adverse effect on high temperature performance. After mixed with Sasobit and Aspha-min additive, the high temperature property of asphalt is improved, but the low temperature performance is weakened. ZYF-1 and Sasobit significantly reduces the high temperature viscosity of asphalt binder, while Aspha-min makes the viscosity slightly increase. 4% by the weight of asphalt is recommended as the reasonable dosage for ZYF-1 based on the variation of asphalt performance. Freeze-thaw cycle simulation obviously influences the water stability of warm mix asphalt mixture, and 15 freeze-thaw cycles are recommended for the evaluation of water stability. Among tested additives, the deterioration range of water stability for asphalt mixture caused by ZYF-1 is the smallest. The warm mix asphalt mixture containing ZYF-1 effectively reduce the construction temperature while ensuring the road performance. (C) 2020 Elsevier Ltd. All rights reserved.
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