基于流变学的SEBS/橡胶粉复合改性沥青低温性能研究
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摘要
为提高橡胶沥青在寒冷地区的路用性能,选用SEBS改性剂对橡胶沥青进行复合改性,在保持橡胶粉掺量一定的情况下制备不同SEBS掺量的复合改性沥青,通过弯曲梁流变仪(BBR)对沥青低温性能进行测定,并引入蠕变速率劲度比(m/S)和低温连续分级温度(T_(LC))对不同SEBS掺量的复合改性沥青低温性能进行评价。结果表明,SEBS改性剂可显著降低沥青蠕变劲度,使沥青低温柔性得到改善,且温度越低改善效果越明显;短期老化后复合改性沥青的柔性和应力松弛能力均未出现明显降低,表明短期老化后沥青仍能保持较好的低温性能,SEBS对沥青抗老化性能具有改善作用;掺加SEBS改性剂后,m/S值有所提高,低温连续分级温度显著降低,表明SEBS/橡胶粉改性沥青具有优越的低温性能,通过综合比选得出SEBS最佳掺量为6%。
In order to improve the road performance of rubber asphalt in cold regions, SEBS modifier was used to compound the rubber asphalt. The prepared composite modified asphalt with different SEBS content was tested when keeping the rubber powder content unchanged. The low temperature performance of asphalt was tested by bending beam rheometer(BBR), and the creep rate stiffness ratio(m/S) and low temperature continuous grading temperature(T_(LC)) were introduced to evaluate the low temperature performance of composite modified asphalt with different SEBS content. Test results indicate that SEBS modifier could significantly reduce the creep stiffness of asphalt, thus improving the low temperature flexibility of asphalt. And the lower the temperature, the more obvious the improvement was. The flexibility and stress relaxation ability of the composite modified asphalt did not decrease significantly after short-term aging, indicating that the asphalt could maintain good low temperature performance after short-term aging, and SEBS could improve the anti-aging performance of asphalt. After adding SEBS modifier, the m/S value increased and the T_(LC) value decreased significantly. Therefore, SEBS/rubber powder modified asphalt had superior low temperature performance. Through comprehensive comparison, the optimal content of SEBS was 6%.
In order to improve the road performance of rubber asphalt in cold regions, SEBS modifier was used to compound the rubber asphalt. The prepared composite modified asphalt with different SEBS content was tested when keeping the rubber powder content unchanged. The low temperature performance of asphalt was tested by bending beam rheometer(BBR), and the creep rate stiffness ratio(m/S) and low temperature continuous grading temperature(T_(LC)) were introduced to evaluate the low temperature performance of composite modified asphalt with different SEBS content. Test results indicate that SEBS modifier could significantly reduce the creep stiffness of asphalt, thus improving the low temperature flexibility of asphalt. And the lower the temperature, the more obvious the improvement was. The flexibility and stress relaxation ability of the composite modified asphalt did not decrease significantly after short-term aging, indicating that the asphalt could maintain good low temperature performance after short-term aging, and SEBS could improve the anti-aging performance of asphalt. After adding SEBS modifier, the m/S value increased and the T_(LC) value decreased significantly. Therefore, SEBS/rubber powder modified asphalt had superior low temperature performance. Through comprehensive comparison, the optimal content of SEBS was 6%.
引文
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[15] Zheng Chuanfeng,Chen Hao,Su Junsheng,et al.Experimental study on SEBS modified asphalt[J].Highway Engineering,2011,36(2):34-37(in Chinese).郑传峰,陈浩,苏俊省,等.SEBS改性沥青试验研究[J].公路工程,2011,36(2):34-37.
[16] Polacco G,Muscente A,Biondi D,et al.Effect of composition on the properties of SEBS modified asphalts[J].European Polymer Journal,2005,42(5):1113-1121.
[17] Hu Mingjun,Lei Gang,Yue Yang,et al.Quantitative test of low temperature bonding strength of matrix asphalt and SEBS modified asphalt[J].Highway,2017(6):260-262(in Chinese).胡明君,雷刚,岳阳,等.基质沥青和SEBS改性沥青低温粘结强度定量测试[J].公路,2017(6):260-262.
[18] Liu S T,Cao W D,Shang S J,et al.Analysis and application of relationships between low- temperature rheological performance parameters of asphalt binders[J].Construction and Building Materials,2010,24(4):471-478.
[2] Fu Z,Dang Y N,Guo B,et al.Laboratory investigation on the properties of asphalt mixtures modified with double-adding admixtures and sensitivity analysis[J].Journal of Traffic and Transportation Engineering(English Edition),2016,3(5):412-426.
[3] Ding Peng,Ji Zezhong,Xu Bo,et al.Study on Properties of Warm Mix Finished High Viscosity Asphalt and Mixtures[J].Journal of Chongqing University of Technology (NaturalScience),2018(4):127-134(in Chinese).丁鹏,吉泽中,徐波,等.温拌成品高粘沥青及其混合料性能研究[J].重庆理工大学学报(自然科学),2018(4):127-134.
[4] Liu Dalu,Chen Huiqiang,He Qingpeng,et al.High temperature performance of PE-desulfurized rubber composite modified asphalt[J].Journal of China & Foreign Highway,2018,38(4):303-306(in Chinese).刘大路,陈辉强,何青蓬,等.PE-脱硫橡胶复合改性沥青高温性能研究[J].中外公路,2018,38(4):303-306.
[5] Liu S T,Cao W,Fang J G,et al.Variance analysis and performance evaluation of different crumb rubber modified (CRM) asphalt[J].Construction and Building Materials,2009,23(7):2701-2708.
[6] Guo Chaoyang,He Zhaoyi,Cao Yang.Research on modification mechanism of waste tire rubber modified asphalt[J].Journal of China & Foreign Highway,2008,28(2):172-176(in Chinese).郭朝阳,何兆益,曹阳.废胎胶粉改性沥青改性机理研究[J].中外公路,2008,28(2):172-176.
[7] Chen Zijian.Research on low temperature performance of rubber asphalt[J].Highway,2010(6):185-187(in Chinese).陈子建.橡胶沥青低温性能研究[J].公路,2010(6):185-187.
[8] Li Xiaoyan,Ping Lu,Wang Hainian,et al.Performance test of rubber asphalt based on domestic and abroad test methods[J].Journal of Traffic and Transportation Engineering,2015,15(1):10-17(in Chinese).李晓燕,平路,汪海年,等.基于国内外试验方法的橡胶沥青性能测试[J].交通运输工程学报,2015,15(1):10-17.
[9] Tan Yiqiu,Fu Yongkang,Ji Lun,et al.Low-temperature evaluation index of rubber asphalt[J].Journal of Harbin Institute of Technology,2016,48(3):66-70(in Chinese).谭忆秋,符永康,纪伦,等.橡胶沥青低温评价指标[J].哈尔滨工业大学学报,2016,48(3):66-70.
[10] Li Ningli,Zhao Xinpo,Sun Jishu,et al.Study on aging mechanism of rubber-modified asphalt[J].Journal of Highway and Transportation Research and Development,2015,32(7):18-27(in Chinese).李宁利,赵新坡,孙吉书,等.橡胶沥青老化机理研究[J].公路交通科技,2015,32(7):18-27.
[11] He Liang,Ma Yu,Ling Qingtian,et al.Analysis on crumb rubber modified asphalt and its aging characteristics on microscale[J].Journal of Functional Materials,,2015,46(21):21093-21098(in Chinese).何亮,马育,凌天清,等.橡胶改性沥青及老化特征微观尺度分析[J].功能材料,2015,46(21):21093-21098.
[12] Zhu J Q,Bj?rn Birgisson,Niki Kringos.Polymer modification of bitumen:advances and challenges[J].European Polymer Journal,2014,54(5):18-38.
[13] Xing Haipeng,Performance research on asphalt and mixture modified with SEBS[D].Xi’an:Chang’an University,2018(in Chinese).邢海鹏.SEBS改性沥青及混合料性能研究[D].西安:长安大学,2018.
[14] Xie Jianguang,Qian Chunxiang,Xiao Qingyi,Et al.Performances and mechanism analysis of SEBS modified asphalt[J].Journal of Southeast University (Natural Science Edition).2004,34(1):96-99(in Chinese).解建光,钱春香,肖庆一,等.SEBS改性沥青性能研究与机理分析[J].东南大学学报(自然科学版),2004,34(1):96-99.
[15] Zheng Chuanfeng,Chen Hao,Su Junsheng,et al.Experimental study on SEBS modified asphalt[J].Highway Engineering,2011,36(2):34-37(in Chinese).郑传峰,陈浩,苏俊省,等.SEBS改性沥青试验研究[J].公路工程,2011,36(2):34-37.
[16] Polacco G,Muscente A,Biondi D,et al.Effect of composition on the properties of SEBS modified asphalts[J].European Polymer Journal,2005,42(5):1113-1121.
[17] Hu Mingjun,Lei Gang,Yue Yang,et al.Quantitative test of low temperature bonding strength of matrix asphalt and SEBS modified asphalt[J].Highway,2017(6):260-262(in Chinese).胡明君,雷刚,岳阳,等.基质沥青和SEBS改性沥青低温粘结强度定量测试[J].公路,2017(6):260-262.
[18] Liu S T,Cao W D,Shang S J,et al.Analysis and application of relationships between low- temperature rheological performance parameters of asphalt binders[J].Construction and Building Materials,2010,24(4):471-478.