煤直接液化残渣中的四氢呋喃可溶物对沥青流变性能的影响
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摘要
为了研究从煤直接液化残渣(direct coal liquefaction residue,DCLR)中萃取得到的四氢呋喃可溶物(tetrahydrofuran soluble,THFS)作为改性剂对沥青流变性能的影响,选用SK-90作为基质沥青,分别制备了不同掺量(与基质沥青质量比分别为0%、4%、6%、8%、10%)的THFS改性沥青。通过应变扫描,首先确定沥青的线黏弹范围,其次在线黏弹范围内通过动态剪切流变(DSR)试验和弯曲蠕变劲度(BBR)试验得到车辙因子、疲劳因子、蠕变速率及蠕变劲度模量等,最后,结合CAM模型(一种在动态剪切作用下建立的可描述不同沥青材料宽温宽频主曲线的数学模型)物理参数的分析,对THFS改性沥青的流变特性进行综合评价。研究结果表明:随着THFS掺量的提高,THFS改性沥青的高温稳定性和感温性能越来越好,但低温性能和疲劳性能受到一定的负面影响;按照时温等效原则,复合出THFS改性沥青在45℃下的复数模量主曲线,并对其进行CAM模型拟合,拟合判定系数R~2均在0.999以上。利用CAM模型中物理参数对THFS改性沥青的黏弹特性进行评价,发现添加THFS后降低了沥青的温度敏感性,使其对路表温度变化的适应性增强。综合考虑THFS改性沥青各项性能,确定THFS最佳掺量应控制在6%以内。
To research the rheological properties of tetrahydrofuran soluble(THFS)-extracted from direct coal liquefaction residue(DCLR), as a modified asphalt binder,asphalt binders with different tetrahydrofuran soluble(THFS) content(0%, 4%, 6%, 8% and 10% by weight of SK-90) were prepared. First, the linear viscoelastic range was determined through strain sweep, and then, the test results of rutting factor, fatigue factor, creep rate and creep modulus were obtained within the linear viscoelastic range of the asphalt binder, using a dynamic shear rheometer(DSR) and bending beam rheometer(BBR) test. Finally, the physical parameters of a CAM model were integrated and used, which is a mathematical model for describing the wide temperature and wide frequency domains master curve of different asphalt materials under dynamic shearing, to analyze the rheological properties of the asphalt binder. The results show that with an increase in the THFS content, high temperature stability and temperature susceptibility improve, however, there is a decline in the low-temperature and fatigue performances. According to the time-temperature equivalence principle, a modulus master curve of the THFS modified asphalt was synthesized at 45 ℃,and the CAM model was used to fit it, the fitting judgment coefficient R~2 is found to be above 0.999. The viscoelastic properties of the THFS modified asphalt is evaluated using physical parameters in the CAM model. It is found that the temperature sensitivity of the modified asphalt decreases with an increase in THFS content, and it can be better adapted to changes in the pavement temperature. Therefore, the optimal THFS content is recommended to be within 6%, according to its comprehensive properties. 7 tabs, 10 figs, 25 refs.
To research the rheological properties of tetrahydrofuran soluble(THFS)-extracted from direct coal liquefaction residue(DCLR), as a modified asphalt binder,asphalt binders with different tetrahydrofuran soluble(THFS) content(0%, 4%, 6%, 8% and 10% by weight of SK-90) were prepared. First, the linear viscoelastic range was determined through strain sweep, and then, the test results of rutting factor, fatigue factor, creep rate and creep modulus were obtained within the linear viscoelastic range of the asphalt binder, using a dynamic shear rheometer(DSR) and bending beam rheometer(BBR) test. Finally, the physical parameters of a CAM model were integrated and used, which is a mathematical model for describing the wide temperature and wide frequency domains master curve of different asphalt materials under dynamic shearing, to analyze the rheological properties of the asphalt binder. The results show that with an increase in the THFS content, high temperature stability and temperature susceptibility improve, however, there is a decline in the low-temperature and fatigue performances. According to the time-temperature equivalence principle, a modulus master curve of the THFS modified asphalt was synthesized at 45 ℃,and the CAM model was used to fit it, the fitting judgment coefficient R~2 is found to be above 0.999. The viscoelastic properties of the THFS modified asphalt is evaluated using physical parameters in the CAM model. It is found that the temperature sensitivity of the modified asphalt decreases with an increase in THFS content, and it can be better adapted to changes in the pavement temperature. Therefore, the optimal THFS content is recommended to be within 6%, according to its comprehensive properties. 7 tabs, 10 figs, 25 refs.
引文
[1] LIU Zhen-yu,SHI Shi-dong,LI Yong-wang.Coal liquefaction technologies development in China and challenges in chemical reaction engineering[J].Chemical Engineering Science,2010,65(1):12-17.
[2] ELLIOT M A.Chemistry of coal utilization (second supplementary volume)[M].New York:John Wiley & Sons,Inc.,1981.
[3] ZHENG Li-zhen,WANG Xiao-hua,ZHANG Tie-shuan,et al.Research progress in utilizations of coal liquefaction residues[C]//IEEE.Proceedings of International Conference on Materials for Renewable Energy and Environment.New York:IEEE,2011:1627-1630.
[4] PATEL P,FIATO R.China and South Africa pursue coal liquefaction[J].MRS Bulletin,2012,37(3):204-205.
[5] 赖世熘,陈学连,盛英.一种用于从煤直接液化残渣中分离沥青烯、前沥青烯和重质油的离子液复合萃取剂:中国,201010614927[P].2011-05-04.LAI Shi-liu,CHEN Xue-lian,SHENG Ying.An ionic liquid extractant used to separate asphaltenes,asphaltenes and heavy oils from direct coal liquefaction residue:China,201010614927[P].2011-05-04.
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[8] RATHBONE R F,HOWER J C,DERBYSHIRE F J.The application of fluorescence microscopy to coal-derived characterization[J].Fuel,1993,72(8):1177-1185.
[9] 王寨霞,杨建丽,刘振宇.煤直接液化残渣对道路沥青改性作用的初步评价[J].燃料化学学报,2007,35(1):109-112.WANG Zhai-xia,YANG Jian-li,LIU Zhen-yu.Preliminary evaluation of direct coal liquefaction residue modification effect on road asphalt[J].Journal Fuel Chemistry and Technology,2007,35(1):109-112.
[10] 季节,石越峰,索智,等.DCLR与TLA共混改性沥青的性能对比[J].燃料化学学报,2015,43(9):1061-1067.JI Jie,SHI Yue-feng,SUO Zhi,et al.Comparison on properties of modified asphalt blended with DCLR and TLA[J].Journal Fuel Chemistry and Technology,2015,43(9):1061-1067.
[11] JI Jie,ZHAO Yong-shang,XU Shi-fa.Study on properties of the blends with direct coal liquefaction residue and asphalt[J].Applied Mechanics and Materials,2014,488:316-321.
[12] JI Jie,YAO Hui,YANG Xu,et al.Performance analysis of direct coal liquefaction residue (DCLR) and Trinidad Lake Asphalt (TLA) for the purpose of modifying tradition alasphalt[J].Arabian Journal for Science and Engineering,2016,41(10):3983-3993.
[13] 何亮.煤液化残渣复合改性沥青制备及其性能研究[D].西安:长安大学,2013.HE Liang.Research on preparation and properties of direct coal liquefaction residue modified asphalt[D].Xi'an:Chang'an University,2013.
[14] 季节,石越峰,索智,等.DCLR与TLA改性沥青胶浆的流变性能对比[J].沈阳建筑大学学报:自然科学版,2015,31(6):1041-1048.JI Jie,SHI Yue-feng,SUO Zhi,et al.Rheological performance comparison of the DCLR and the TLA modified asphalt mortar[J].Journal of Shenyang Jianzhu University:Natural Science,2015,31(6):1041-1048.
[15] 尹艳平,陈华鑫,宋莉芳,等.SBS/HON复合改性沥青流变性能[J].北京工业大学学报,2017,43(9):1405-1409.YIN Yan-ping,CHEN Hua-xin,SONG Li-fang,et al.Rheological properties of SBS/HON composite modified asphalt[J].Journal of Beijing University of Technology,2017,43(9):1405-1409.
[16] ZHANG F,YU J,WU S.Influence of ageing on rheology of SBR/sulfur-modified asphalts[J].Polymer Engineering & Science,2012,52(1):71-79.
[17] 樊亮,孔祥利,林江涛,等.基于流变测试技术的沥青评价方法研究进展[J].材料导报,2012,26(1):123-128.FAN Liang,KONG Xiang-li,LIN Jiang-tao,et al.Review of asphalt evaluation methods based on rheological measure technology[J].Materials Review,2012,26(1):123-128.
[18] 季节,石越峰,索智,等.THFS改性沥青制备工艺的优化设计及性能评价[J].北京建筑大学学报,2016,32(3):55-60.JI Jie,SHI Yue-feng,SUO Zhi,et al.Optimization design of preparation process for THFS modified asphalt binder and its performance evaluation[J].Beijing University of Civil Engineering and Architecture,2016,32(3):55-60.
[19] 杨娥.掺量对TLA混合沥青的高温性能影响和应用研究[D].广州:华南理工大学,2014.YANG E.Research on the content effects on the high temperature performance and application of TLA mixed asphalt[D].Guangzhou:South China University of Technology,2014.
[20] 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.HE Li-ping.Reserch on the viscoelastic characteritistic and high temperature properties based DMA of rubber asphalt[D].Xi'an:Chang'an Unversity,2014.
[21] AASHTO TP1-1998,Standard test method for determining flexural creep stiffness of asphalt binder using the bending beam rheometer BBR 2000 edition[S].
[22] AASHTO TP5-1998,Standard test method for determining the rheological properties of asphalt binder using a dynamic shear rheometer DSR 2000 edition[S].
[23] 董炎明,张海良.高分子科学简明教材[M].北京:科学出版社,2008.DONG Yan-ming,ZHANG Hai-liang.Simple teaching material for polymer science[M].Beijing:Science Press,2008.
[24] 谭忆秋,郭猛,曹丽萍.常用改性剂对沥青黏弹特性的影响[J].中国公路学报,2013,26(4):7-15.TAN Yi-qiu,GUO Meng,CAO Li-ping.Effects of common modifiers on viscoelastic properties of asphalt[J].China Jouranl of Highway and Transport,2013,26(4):7-15.
[25] ZENG M,BAHIA H U,ZHAI H,et al.Rheological modeling of modified asphalt binders and mixtures (with discussion)[J].Journal of the Association of Asphalt Paving Technologists,2001,70:8-35.
[2] ELLIOT M A.Chemistry of coal utilization (second supplementary volume)[M].New York:John Wiley & Sons,Inc.,1981.
[3] ZHENG Li-zhen,WANG Xiao-hua,ZHANG Tie-shuan,et al.Research progress in utilizations of coal liquefaction residues[C]//IEEE.Proceedings of International Conference on Materials for Renewable Energy and Environment.New York:IEEE,2011:1627-1630.
[4] PATEL P,FIATO R.China and South Africa pursue coal liquefaction[J].MRS Bulletin,2012,37(3):204-205.
[5] 赖世熘,陈学连,盛英.一种用于从煤直接液化残渣中分离沥青烯、前沥青烯和重质油的离子液复合萃取剂:中国,201010614927[P].2011-05-04.LAI Shi-liu,CHEN Xue-lian,SHENG Ying.An ionic liquid extractant used to separate asphaltenes,asphaltenes and heavy oils from direct coal liquefaction residue:China,201010614927[P].2011-05-04.
[6] ADACHI Y,NAKAMIZ M.Chemical structure of pyridine soluble matter of coal liquefaction residue[J].Journal of the Japan Institute of Energy,1993,72(10):930-934.
[7] SUGANO M,IKEMIZU R,MASHIMO K.Effects of the oxidation pretreatment with hydrogen peroxide on the hydrogenolysis reactivity of the coal liquefaction residue[J].Fuel Processing Technology,2002,77(1):67-73.
[8] RATHBONE R F,HOWER J C,DERBYSHIRE F J.The application of fluorescence microscopy to coal-derived characterization[J].Fuel,1993,72(8):1177-1185.
[9] 王寨霞,杨建丽,刘振宇.煤直接液化残渣对道路沥青改性作用的初步评价[J].燃料化学学报,2007,35(1):109-112.WANG Zhai-xia,YANG Jian-li,LIU Zhen-yu.Preliminary evaluation of direct coal liquefaction residue modification effect on road asphalt[J].Journal Fuel Chemistry and Technology,2007,35(1):109-112.
[10] 季节,石越峰,索智,等.DCLR与TLA共混改性沥青的性能对比[J].燃料化学学报,2015,43(9):1061-1067.JI Jie,SHI Yue-feng,SUO Zhi,et al.Comparison on properties of modified asphalt blended with DCLR and TLA[J].Journal Fuel Chemistry and Technology,2015,43(9):1061-1067.
[11] JI Jie,ZHAO Yong-shang,XU Shi-fa.Study on properties of the blends with direct coal liquefaction residue and asphalt[J].Applied Mechanics and Materials,2014,488:316-321.
[12] JI Jie,YAO Hui,YANG Xu,et al.Performance analysis of direct coal liquefaction residue (DCLR) and Trinidad Lake Asphalt (TLA) for the purpose of modifying tradition alasphalt[J].Arabian Journal for Science and Engineering,2016,41(10):3983-3993.
[13] 何亮.煤液化残渣复合改性沥青制备及其性能研究[D].西安:长安大学,2013.HE Liang.Research on preparation and properties of direct coal liquefaction residue modified asphalt[D].Xi'an:Chang'an University,2013.
[14] 季节,石越峰,索智,等.DCLR与TLA改性沥青胶浆的流变性能对比[J].沈阳建筑大学学报:自然科学版,2015,31(6):1041-1048.JI Jie,SHI Yue-feng,SUO Zhi,et al.Rheological performance comparison of the DCLR and the TLA modified asphalt mortar[J].Journal of Shenyang Jianzhu University:Natural Science,2015,31(6):1041-1048.
[15] 尹艳平,陈华鑫,宋莉芳,等.SBS/HON复合改性沥青流变性能[J].北京工业大学学报,2017,43(9):1405-1409.YIN Yan-ping,CHEN Hua-xin,SONG Li-fang,et al.Rheological properties of SBS/HON composite modified asphalt[J].Journal of Beijing University of Technology,2017,43(9):1405-1409.
[16] ZHANG F,YU J,WU S.Influence of ageing on rheology of SBR/sulfur-modified asphalts[J].Polymer Engineering & Science,2012,52(1):71-79.
[17] 樊亮,孔祥利,林江涛,等.基于流变测试技术的沥青评价方法研究进展[J].材料导报,2012,26(1):123-128.FAN Liang,KONG Xiang-li,LIN Jiang-tao,et al.Review of asphalt evaluation methods based on rheological measure technology[J].Materials Review,2012,26(1):123-128.
[18] 季节,石越峰,索智,等.THFS改性沥青制备工艺的优化设计及性能评价[J].北京建筑大学学报,2016,32(3):55-60.JI Jie,SHI Yue-feng,SUO Zhi,et al.Optimization design of preparation process for THFS modified asphalt binder and its performance evaluation[J].Beijing University of Civil Engineering and Architecture,2016,32(3):55-60.
[19] 杨娥.掺量对TLA混合沥青的高温性能影响和应用研究[D].广州:华南理工大学,2014.YANG E.Research on the content effects on the high temperature performance and application of TLA mixed asphalt[D].Guangzhou:South China University of Technology,2014.
[20] 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.HE Li-ping.Reserch on the viscoelastic characteritistic and high temperature properties based DMA of rubber asphalt[D].Xi'an:Chang'an Unversity,2014.
[21] AASHTO TP1-1998,Standard test method for determining flexural creep stiffness of asphalt binder using the bending beam rheometer BBR 2000 edition[S].
[22] AASHTO TP5-1998,Standard test method for determining the rheological properties of asphalt binder using a dynamic shear rheometer DSR 2000 edition[S].
[23] 董炎明,张海良.高分子科学简明教材[M].北京:科学出版社,2008.DONG Yan-ming,ZHANG Hai-liang.Simple teaching material for polymer science[M].Beijing:Science Press,2008.
[24] 谭忆秋,郭猛,曹丽萍.常用改性剂对沥青黏弹特性的影响[J].中国公路学报,2013,26(4):7-15.TAN Yi-qiu,GUO Meng,CAO Li-ping.Effects of common modifiers on viscoelastic properties of asphalt[J].China Jouranl of Highway and Transport,2013,26(4):7-15.
[25] ZENG M,BAHIA H U,ZHAI H,et al.Rheological modeling of modified asphalt binders and mixtures (with discussion)[J].Journal of the Association of Asphalt Paving Technologists,2001,70:8-35.