盐冻循环条件下沥青高低温性能的灰关联熵分析
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摘要
利用动态剪切流变仪(DSR)和弯曲梁流变仪(BBR)对冻融循环前后的三种沥青(沥青、苯乙烯-丁二烯-苯乙烯嵌段共聚物(SBS)改性沥青、胶粉改性沥青)进行测试,比较分析不同冰冻温度、融雪盐浓度、冻融循环次数下三种沥青的高低温性能变化规律,并对环境因素进行灰熵分析。结果表明:在盐冻循环条件下对沥青复合模量G*影响最大的因素是融雪盐溶液浓度,其次是10℃延度;对沥青相位角δ影响最大的因素是软化点,其次是25℃针入度;对沥青蠕变劲度模量S影响最大的因素是融雪盐溶液浓度,其次是10℃延度;对沥青蠕变速率m影响最大的因素是试验温度,其次是冰冻温度。
The dynamic shear rheometer(DSR)and bending beam rheometer(BBR)were utilized to test three asphalt(asphalt,styrene-butadiene-styene blockcopolymer(SBS)modified asphalt,rubber powder modified asphalt)before and after freeze-thaw cycles.The variation orderliness of high and low temperature performance of three asphalt under different freezing temperature and the concentration of snow melting salt and the cycle times of freezethaw were compared.Then the environment factors by grey correlation entropy were analyzed.The result shows that the most important factor on the complex modulus of asphalt(G*)is the concentration of snow melting salt,followed by 10℃ ductility.The factor which has the greatest impact on phase angle of asphalt(δ)is softening point,followed by 25℃ penetration.And the biggest influencing factor on the creep stiffness modulus of asphalt(S)is the concentration of snow melting salt,followed by 10 ℃ ductility.The factor which have the greatest impact on creep rate of asphalt(m)is test temperature,followed by freezing temperature.
The dynamic shear rheometer(DSR)and bending beam rheometer(BBR)were utilized to test three asphalt(asphalt,styrene-butadiene-styene blockcopolymer(SBS)modified asphalt,rubber powder modified asphalt)before and after freeze-thaw cycles.The variation orderliness of high and low temperature performance of three asphalt under different freezing temperature and the concentration of snow melting salt and the cycle times of freezethaw were compared.Then the environment factors by grey correlation entropy were analyzed.The result shows that the most important factor on the complex modulus of asphalt(G*)is the concentration of snow melting salt,followed by 10℃ ductility.The factor which has the greatest impact on phase angle of asphalt(δ)is softening point,followed by 25℃ penetration.And the biggest influencing factor on the creep stiffness modulus of asphalt(S)is the concentration of snow melting salt,followed by 10 ℃ ductility.The factor which have the greatest impact on creep rate of asphalt(m)is test temperature,followed by freezing temperature.
引文
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[15]冯蕾,王乐,崔亚楠,等.盐冻循环对胶粉改性沥青混合料性能的影响[J].公路工程,2014,39(4):117-123.FENG L,WANG L,CUI Y N,et al.The influence that salt freezing cycles have on the property of rubber powder modified asphalt mixture[J].Highway Engineering,2014,39(4):117-123(in Chinese).
[2]谭忆秋,赵立冬,兰碧武,等.反复凝冰作用下沥青混合料性能研究[J].建筑材料学报,2011,14(6):761-766.TAN Y Q,ZHAO L D,LAN B W,et al.Performance of asphalt mixture under repeated condensation of ice[J].Journal of Building Materials,2011,14(6):761-766(in Chinese).
[3]DESHPANDE V S,CEBON D.Steady-state constitutive relationship for idealized asphalt mixtures[J].Mechanics of Materials,1999,31(4):271-287.
[4]韩吉伟,崔亚楠,王乐,等.盐冻循环条件下SBS改性沥青砂浆的力学性能分析[J].功能材料,2015,12(46):12141-12145.HAN J W,CUI Y N,WANG L,et al.The mechanical properties analysis of SBS modified asphalt motar under salt freezing cycle[J].Journal of Functional Materials,2015,12(46):12141-12145(in Chinese).
[5]崔亚楠,韩吉伟,李震,等.盐冻循环对沥青性能及其微观结构的影响[J].功能材料,2015,46(18):18037-18042.CUI Y N,HAN J W,LI Z,et al.Research on the performance and microstructure of asphalt under salt freezing cycle[J].Journal of Functional Materials,2015,46(18):18037-18042(in Chinese).
[6]王乐.盐冻条件下沥青砂浆的力学性能研究[D].呼和浩特:内蒙古工业大学,2014.WANG L.Mechauical properties research on asphalt mortar under the condition of salt freezing[D].Hohhot:Inner Mongolia University of Technology,2014(in Chinese).
[7]冯超.融雪剂对沥青混合料性能影响研究[D].西安:长安大学,2012.FENG C.Snowmelt agent influence on asphalt mixtures performances[D].Xian:Changan University,2012(in Chinese).
[8]李超,韩吉伟.改性沥青在盐冻融循环条件下的性能研究[J].内蒙古工业大学学报,2014,33(1):58-61.LI C,HAN J W.Research on the performance of modified asphalt under the salt frost thawing cycle[J].Journal of Inner Mongolia University of Technology,2014,33(1):58-61(in Chinese).
[9]韩吉伟,崔亚楠,李嘉迪,等.盐冻循环条件下改性沥青的细观结构及低温流变性能分析[J].复合材料学报,2016,33(8):1718-1724.HAN J W,CUI Y N,LI J D,et al.Analysis of microstructure and rheological properties of modified asphalt under salt freezing cycle at low temperature[J].Acta Materiae Compositae Sinica,2016,33(8):1718-1724(in Chinese).
[10]傅广文.融雪剂对沥青及沥青混合料性能影响研究[D].长沙:长沙理工大学,2010.FU G W.Research on influence of snowmelt agent to performance of asphalt and asphalt mixture[D].Changsha:Changsha University of Science&Technology,2010(in Chinese).
[11]郑建华.氯盐浸蚀下沥青混凝土性能试验研究[D].湖北:湖北工业大学,2011.ZHENG J H.Experimental study on performance of asphalt concrete under sodium chloride corrosion[D].Hubei:Hubei University of Technology,2011(in Chinese).
[12]刘振正.盐冻循环条件下沥青材料的性能研究[D].呼和浩特:内蒙古工业大学,2013.LIU Z Z.Research on the performance change of asphalt under the salt freezing circulation[D].Hohhot:Inner Mongolia University of Technology,2013(in Chinese).
[13]熊剑平,申爱琴,潘载业.道路水泥混凝土抗盐冻性试验研究[J].公路,2010(2):152-159.XIONG J P,SHEN A Q,PAN Z Y.Research on salt frost resistance of road cement concrete[J].Highway,2010(2):152-159(in Chinese).
[14]吴钊.冻融循环对沥青混合料性能的影响研究[D].武汉:武汉理工大学,2011.WU Z.Impactof freeze-thaw cycles on the performance of asphalt mixtures[D].Wuhan:Wuhan University of Science&Technology,2011(in Chinese).
[15]冯蕾,王乐,崔亚楠,等.盐冻循环对胶粉改性沥青混合料性能的影响[J].公路工程,2014,39(4):117-123.FENG L,WANG L,CUI Y N,et al.The influence that salt freezing cycles have on the property of rubber powder modified asphalt mixture[J].Highway Engineering,2014,39(4):117-123(in Chinese).