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材料导报  2019, Vol. 33 Issue (14): 2386-2391    https://doi.org/10.11896/cldb.18060087
  无机非金属及其复合材料 |
基于流变学与黏弹性理论的温拌胶粉改性沥青的高温性能研究
王岚, 崔世超, 常春清
内蒙古工业大学土木工程学院,呼和浩特 010051
High Temperature Performance of Warm Mix Crumb Rubber Modified Asphalt Based on Rheological and Viscoelastic Theory
WANG Lan, CUI Shichao, CHANG Chunqing
School of Civil Engineering, Inner Mongolia University of Technology, Huhhot 010051
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摘要 基于流变学与黏弹性理论,对不同温拌剂及温拌剂掺量的温拌胶粉(WCR)改性沥青与胶粉(CR)改性沥青进行高温动态剪切流变试验(DSR)与重复荷载恢复试验(RCRB),并对WCR改性沥青的高温性能进行评价。结果表明:两种温拌剂的加入都可以提高沥青的高温性能,沥青的复数剪切模量G*变大,相位角δ减小,改进的车辙因子G*/(sinδ)9增大;且随每种温拌剂掺量的增加,表面活性剂(SDYK)型WCR改性沥青的高温抗变形能力呈先增大后减小的趋势,降粘剂(EM)型WCR改性沥青的高温抗变形能力呈逐渐减小的趋势。在相同温度和应力水平下,两种温拌剂的加入均会提高沥青的黏性部分Gv值,且SDYK型WCR改性沥青的Gv值在SDYK掺量为0.6%(质量分数,下同)时出现峰值,EM型WCR改性沥青的Gv值在EM掺量为1%时达到峰值;0.6%SDYK掺量与1%EM掺量的WCR改性沥青的高温性能均较好。对比相同温度和应力水平下,0.6%SDYK掺量的WCR改性沥青的残余应变与初始应变比值(ε1/ε2)最小,具有最佳的变形恢复能力。通过层次分析法(AHP)对评价沥青高温性能指标的ε1/ε2GvZ(黏弹指标)进行对比分析发现,Z具有最大的权重,推荐使用黏弹指标Z来评价WCR改性沥青高温性能。
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王岚
崔世超
常春清
关键词:  温拌胶粉改性沥青  流变学  黏弹性  高温性能    
Abstract: Based on rheological and viscoelastic theory, the high temperature dynamic shear rheological test (DSR) of warm mix rubber modified asphalt (WCR) and rubber powder modified asphalt (CR) with different temperature mixing agents and warming agent dosages and the repeated load recovery test (RCRB) were applied to evaluate the high temperature properties of the WCR modified asphalt. Results showed that the addition of two warming agents can improve the high temperature performance of asphalt. The complex shear modulus G*of asphalt became larger, the phase angle δ decreased, and the improved rutting factor G*/(sinδ)9 increased. The high temperature deformation resistance of SDYK type WCR modified asphalt increased first and then decreased,and the high temperature deformation resistance of EM type WCR modified asphalt decreased gradually. Under the same temperature and stress level, the addition of two warming agents can improve the viscosity of asphalt Gv va-lue, the Gv value of SDYK type WCR modified asphalt reached a peak when the content of SDYK was 0.6wt%, while that of EM type WCR modified asphalt reached a peak when the content of EM was 1wt%, WCR modified asphalt with 0.6wt% SDYK content and 1wt% EM content had excellent high temperature performance. Compared with the same temperature and stress level, the residual strain to initial strain ratio (ε1/ε2) of 0.6wt% SDYK blended WCR modified asphalt had the smallest deformation recovery capability. Through the analytic hierarchy process (AHP) to evaluate asphalt high temperature performance index epsilon ε1/ε2, Gv, Z (the viscoelastic index), Z has a maximum weight. Thus, it is recommended to use viscoelastic index Z to evaluate performance of WCR modified asphalt at high temperature.
Key words:  warm mix crumb rubber modified asphalt    rheology    viscoelasticity    high temperature performance
               出版日期:  2019-07-25      发布日期:  2019-06-19
ZTFLH:  U414  
基金资助: 国家自然科学基金(11762012);内蒙古交通科技项目(NJ-2015-1)
通讯作者:  wanglan661018@163.com   
作者简介:  王岚,内蒙古工业大学教授,现任土木工程学院院长,博士研究生导师,主要从事道路工程材料方向的研究,同时担任中国力学学会第九届理事会理事、内蒙古公路学会理事,交通运输工程一级学科负责人,内蒙古自治区“草原英才”人选。
引用本文:    
王岚, 崔世超, 常春清. 基于流变学与黏弹性理论的温拌胶粉改性沥青的高温性能研究[J]. 材料导报, 2019, 33(14): 2386-2391.
WANG Lan, CUI Shichao, CHANG Chunqing. High Temperature Performance of Warm Mix Crumb Rubber Modified Asphalt Based on Rheological and Viscoelastic Theory. Materials Reports, 2019, 33(14): 2386-2391.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.18060087  或          http://www.mater-rep.com/CN/Y2019/V33/I14/2386
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