苯乙烯-丁二烯-苯乙烯三嵌段共聚物对改性沥青高温流变性能的影响
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摘要
以70#沥青为基质,苯乙烯-丁二烯-苯乙烯三嵌段共聚物(SBS)为改性剂,绥中减三线糠醛抽出油为相容剂,HMD-1为稳定剂,制备出改性沥青。结果表明:在发育时间为8 h的条件下,随着改性剂加入质量分数的增加,改性沥青的针入度降低,软化点、延度、弹性恢复和黏度逐渐提高;在发育时间相同的条件下,随着扫描温度的升高,不同试样的车辙因子均降低;在相同的扫描温度及发育时间下,随着改性剂加入质量分数的增加,不同试样的车辙因子提高;随着剪切频率、改性剂加入质量分数及发育时间的增加,不同试样的复数剪切应力增加。
The modified asphalt was prepared with70#asphalt as matrix,styrene-butadiene-styrene triblock copolymer( SBS) as modifier,furfural extract oil from reduced-pressure third line as compatibilizer,HMD-1 as stabilizer. The results showed that under the condition of development time 8 h,with the rising of mass fraction of modifier,the penetration of modified asphalt decreased,softening point,ductility,elastic recovery and viscosity gradually increased. Under the same condition,with the increasing of scanning temperature,the rutting factor of different samples decreased;at the same scanning temperature and development time,with the increasing of the added mass fraction of modifier,the rutting factor of different samples improved. With the increasing of load frequency,addition mass fraction of modifier and development time,complex shear stress of different samples all increased.
The modified asphalt was prepared with70#asphalt as matrix,styrene-butadiene-styrene triblock copolymer( SBS) as modifier,furfural extract oil from reduced-pressure third line as compatibilizer,HMD-1 as stabilizer. The results showed that under the condition of development time 8 h,with the rising of mass fraction of modifier,the penetration of modified asphalt decreased,softening point,ductility,elastic recovery and viscosity gradually increased. Under the same condition,with the increasing of scanning temperature,the rutting factor of different samples decreased;at the same scanning temperature and development time,with the increasing of the added mass fraction of modifier,the rutting factor of different samples improved. With the increasing of load frequency,addition mass fraction of modifier and development time,complex shear stress of different samples all increased.
引文
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[7]何立平.基于DMA方法的橡胶沥青黏弹特性和高温性能研究[D].西安:长安大学,2014.
[8]谭华,胡松山,刘斌清,等.基于流变学的复合改性橡胶沥青黏弹特性研究[J].土木工程学报,2017,50(1):115-122.
[9]王威,马德崇,樊长昕,等.不同沥青流变性能分析与路用性能比较[J].公路工程,2016,41(11):189-194.
[10]曾诗雅,曹正,朱宗凯.基于多应力蠕变恢复实验的改性沥青高温性能研究[J].公路工程,2014,39(1):246-268.
[11]Bayarma B.沥青零剪切黏度实验方法及计算模型研究[D].大连:大连理工大学,2016.
[2]袁迎捷,张争奇,胡长顺. Superpave沥青规范对改性沥青的适应性[J].长安大学学报(自然科学版),2004,24(1):9-11.
[3]Anderson D A,Lehir Y M,Planche J,et al. Zero shear viscosity of asphalt binders[J]. Transportation Research Record,2002,1810(1):54-62.
[4]陈华鑫,王秉纲. SBS改性沥青车辙因子的改进[J].同济大学学报(自然科学版),2008,36(10):1384-1387.
[5]赵仕林,万芳,陈赞,等.反应性助剂对SBS改性沥青的化学改性研究[J].公路交通科技,2007,24(7):20-24.
[6]张肖宁.沥青与沥青混合料的黏弹性力学原理及应用[M].北京:人民交通出版社,2006:139-157.
[7]何立平.基于DMA方法的橡胶沥青黏弹特性和高温性能研究[D].西安:长安大学,2014.
[8]谭华,胡松山,刘斌清,等.基于流变学的复合改性橡胶沥青黏弹特性研究[J].土木工程学报,2017,50(1):115-122.
[9]王威,马德崇,樊长昕,等.不同沥青流变性能分析与路用性能比较[J].公路工程,2016,41(11):189-194.
[10]曾诗雅,曹正,朱宗凯.基于多应力蠕变恢复实验的改性沥青高温性能研究[J].公路工程,2014,39(1):246-268.
[11]Bayarma B.沥青零剪切黏度实验方法及计算模型研究[D].大连:大连理工大学,2016.