Effect of Sasobit/Waste Cooking Oil Composite on the Physical, Rheological, and Aging Properties of Styrene-Butadiene Rubber (SBR)-Modified Bitumen Binders

被引:4
|
作者
Zhao, Xiongfei [1 ]
Lu, Zhen [2 ,3 ,4 ]
Su, Hengyu [2 ,3 ,4 ]
Le, Qiaoli [2 ,3 ,4 ]
Zhang, Bo [2 ,3 ,4 ]
Wang, Wentong [5 ]
机构
[1] Guizhou Minzu Univ, Infrastruct Dept, Guiyang 550025, Peoples R China
[2] Guizhou Minzu Univ, Sch Civil Engn & Architecture, Guiyang 550025, Peoples R China
[3] State Ethn Affairs Commiss, Key Lab Karst Environm Geol Hazard Prevent, Guiyang 550025, Peoples R China
[4] Guizhou Minzu Univ, Key Lab Urban Underground Space Dev & Safety Karst, Guiyang 550025, Peoples R China
[5] Shandong Univ Sci & Technol, Coll Transportat, Qianwan Harbor Rd, Qingdao 266590, Peoples R China
关键词
Sasobit/WCO composite; rheological property; SBR-modified bitumen; aging property; ASPHALT; SBR;
D O I
10.3390/ma16237368
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The modifying effects of polymer on bitumen low-temperature performance are substantially compromised by the thermal breakdown of styrene-butadiene rubber (SBR) polymer during bitumen mixture production operations. The efficacy of the utilization of Sasobit/waste cooking oil (Sasobit/WCO) as a warm-mix additive has been demonstrated in mitigating the adverse consequences of thermal aging on SBR-modified bitumen binder (SB) while preserving the binder's original performance characteristics. However, few studies have been conducted to further investigate the rheological properties and aging resistance of SB modified with Sasobit/WCO compounds. In this work, three additives-Sasobit, WCO, and Sasobit/WCO composite-were selected, and their effects on the physical and rheological characteristics of SB as well as the temperatures at which the mixtures were prepared were assessed. In addition, by using dynamic shear rheometers (DSR) and bending beam rheometers (BBR), the effects of this innovative warm-mix addition on the performance grade (PG) and aging resistances of SB were evaluated. According to the results, Sasobit/WCO composites outperform Sasobit and WCO in lowering the mixture preparation temperature. Sasobit/WCO also improves both the high- and low-temperature performance of SB simultaneously. Compared to hot-mix asphalt mixtures, the addition of Sasobit/WCO reduces the preparation temperature of the bitumen mixtures by 19 degrees C, which in turn helps to minimize the negative effects of temperature aging on the functioning of the SB. Additionally, the Sasobit/WCO composite addition can improve the SB mixture's resistance to thermal cracking. After the introduction of Sasobit/WCO, the high-temperature PG of SB was raised by two levels, regardless of whether the warm-mix impact was taken into account. With the addition of Sasobit/WCO, SB's resilience to short-term aging was enhanced.
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页数:14
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