Chai Chao, Cheng Yongchun, Zhang Yuwei, Zhu Bing, Liu Hang
College of Transportation, Jilin University, Changchun 130025, China.
Polymers (Basel). 2020 Oct 30;12(11):2552. doi: 10.3390/polym12112552.
This paper studies the mechanical properties of porous asphalt concrete with styrene-butadiene-styrene (SBS) polymer modified bitumen as the binder, steel slag as the aggregate and crumb rubber and basalt fiber as modifiers. First, the appearance, mechanics, chemical composition and high-temperature stability of steel slag were studied by some equipment. Then, three kinds of porous asphalt concrete with SBS polymer modified bitumen as binder were produced, Namely, crumb rubber modified porous asphalt concrete (CR-PAC), basalt fiber modified porous asphalt concrete (BF-PAC), and basalt fiber and crumb rubber composite modified asphalt concrete (CM-PAC). Finally, the properties of the three kinds of modified PACs were studied through the Marshall test, freeze-thaw splitting test, low-temperature splitting test, permeability test, and creep test. The results showed that the crush value and abrasion value of steel slag are 15.1% and 13.5%, respectively; it has excellent strength and abrasion. In addition, the steel slag shows a porous structure and it provides an interface basis for a better bond with bitumen. For the three PACs, the results showed that the Marshall stability, water stability, and low-temperature crack resistance of CM-PAC are all the best Furthermore, CM-PAC has better rutting resistance than two single modified PACs, based on creep test results. The CM-PAC in this study can be used as a new type of pavement material.
本文研究了以苯乙烯-丁二烯-苯乙烯(SBS)聚合物改性沥青为粘结剂、钢渣为集料、橡胶粉和玄武岩纤维为改性剂的多孔沥青混凝土的力学性能。首先,通过一些设备对钢渣的外观、力学性能、化学成分和高温稳定性进行了研究。然后,制备了三种以SBS聚合物改性沥青为粘结剂的多孔沥青混凝土,即橡胶粉改性多孔沥青混凝土(CR-PAC)、玄武岩纤维改性多孔沥青混凝土(BF-PAC)和玄武岩纤维与橡胶粉复合改性沥青混凝土(CM-PAC)。最后,通过马歇尔试验、冻融劈裂试验、低温劈裂试验、渗透试验和蠕变试验研究了三种改性多孔沥青混凝土的性能。结果表明,钢渣的压碎值和磨耗值分别为15.1%和13.5%;具有优异的强度和耐磨性。此外,钢渣呈现出多孔结构,为与沥青更好地粘结提供了界面基础。对于三种多孔沥青混凝土,结果表明CM-PAC的马歇尔稳定性、水稳定性和低温抗裂性均最佳。此外,根据蠕变试验结果,CM-PAC比两种单一改性多孔沥青混凝土具有更好的抗车辙性能。本研究中的CM-PAC可作为一种新型路面材料。