温拌剂对沥青胶结料高低温流变性能的影响
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摘要
基于国外Evotherm温拌剂和国产RH温拌剂,通过动态剪切流变试验(DSR)和沥青弯曲蠕变劲度试验(BBR),对比分析掺入温拌剂后对沥青高低温流变性能的影响。结果表明:RH温拌剂可以提高基质沥青的高温性能,Evotherm温拌剂能提高SBS改性沥青的高温性能;两种温拌剂都能提高沥青的低温抗裂性,其中RH温拌剂的改善效果更好,温度越低,沥青的低温性能越差,改善效果也越差。在低于-24℃时使用温拌剂对沥青的低温性能改善无意义,综合高低温流变试验,发现在北方寒冷地区使用RH温拌剂效果更佳。
Based on foreign Evotherm warm-mixed agent and domestic RH warm-mixed agent,dynamic shear rheological test(DSR)and asphalt bending creep stiffness test(BBR)were used to analyze the effects of high temperature and low temperature on the asphalt after the incorporation of warm-mixed agent impact.The results showed that RH warm-mixed agent can improve the high temperature performance of matrix asphalt,Evotherm warm-mixed agent can improve the high temperature performance of SBS modified asphalt;two kinds of temperature mixture can improve the low temperature crack resistance of asphalt,which RH warmmixed agent to improve the effect of better,the lower the temperature,the lower the low temperature performance of asphalt,improvetheeffectisalsoworse.Itismeaningless to improve the low temperature performance of asphalt when using warm-mixed agentbelow-24℃.ItisfoundthattheuseofRH warm-mixed agent is better in the northern cold area.
Based on foreign Evotherm warm-mixed agent and domestic RH warm-mixed agent,dynamic shear rheological test(DSR)and asphalt bending creep stiffness test(BBR)were used to analyze the effects of high temperature and low temperature on the asphalt after the incorporation of warm-mixed agent impact.The results showed that RH warm-mixed agent can improve the high temperature performance of matrix asphalt,Evotherm warm-mixed agent can improve the high temperature performance of SBS modified asphalt;two kinds of temperature mixture can improve the low temperature crack resistance of asphalt,which RH warmmixed agent to improve the effect of better,the lower the temperature,the lower the low temperature performance of asphalt,improvetheeffectisalsoworse.Itismeaningless to improve the low temperature performance of asphalt when using warm-mixed agentbelow-24℃.ItisfoundthattheuseofRH warm-mixed agent is better in the northern cold area.
引文
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[3]侯月琴.温拌沥青混合料性能研究[D].长安大学,2008.
[4]王岚,桂婉妹,常春清.降黏型温拌胶粉改性沥青高低温性能试验[J/OL].复合材料学报.DOI:10.13801/j.cnki.fhclxb.20161209.001.
[5]贺海,王朝辉,孙晓龙,王新岐,王晓华.新型温拌改性沥青的研发及其路用性能[J].建筑材料学报,2014,17(5):927~932.
[6]Rodrguez-Alloza A M,Gallego J,Perez I.Study of the effect of four warm mix asphalt additives on bitumen modified with 15%crumb rubber[J].Constuction and Building Materials,2013,43:300~308.
[7]高志伟,陈姣,王朝辉,贺海.新型温拌改性沥青流变性能及微观机理[J].材料导报,2015,29(S2):468~471.
[8]崔亚楠,赵琳,韩吉伟,孙广宁.盐冻融循环条件下沥青高温流变性能及微观结构[J/OL].复合材料学报.DOI:10.13801/j.cnki.fhclxb.20161008.002.
[9]郭莹莹,李超,飞虹.改性沥青低温弯曲蠕变性能试验研究[J].内蒙古工业大学学报(自然科学版),2016,35(1):41~45.
[10]Liu S,Cao W,Shang S,Analysis and application of relationships between low-temperature rheological performance parameters of asphalt binders[J].Construction and Building Materials,2010,24(4):471~478.
[11]张永辉.SBS改性沥青和橡胶粉改性沥青机理及路用性能研究[D].长安大学,2015.