改性沥青及混合料流变学性能研究
发布时间：2019-02-27 06:49
【摘要】：利用扫描电子显微镜(SEM)、动态剪切流变试验(DSR)、小梁弯曲蠕变试验及三轴压缩蠕变试验,分别从微观和宏观角度对比研究了胶粉改性沥青(CR)和SBS改性沥青及其混合料的微观结构、高温及低温对其流变性能的影响。SEM试验结果表明,橡胶粉及SBS改性剂都能与沥青达到良好共融,但在沥青混合料中胶粉改性沥青与石料界面的粘结性要优于SBS改性沥青;DSR试验结果表明,CR具有更好的温度稳定性、低温抗裂能力和高温抗变形能力;小梁弯曲蠕变试验在-15、0、15、30,45℃5种温度下对比研究了配合比相同的2种沥青混合料,得到不同温度下的弯曲蠕变速率对比曲线,试验结果表明,CR混合料比SBS改性沥青混合料具有更好的高、低温性能;此外,还进行了45℃下2种沥青混合料的三轴压缩蠕变试验,证明CR沥青混合料具有更好的抗高温变形特性。
[Abstract]:(DSR), beam bending creep test and triaxial compression creep test by (SEM), dynamic shear rheological test with scanning electron microscope, The microstructure of rubber powder modified asphalt (CR) and SBS modified asphalt and the effect of low temperature and high temperature on the rheological properties of the asphalt and its mixture were studied from the micro and macro aspects respectively. The results of SEM test showed that the modified asphalt and its mixture had different rheological properties. Both rubber powder and SBS modifier can achieve good blending with asphalt, but in asphalt mixture, the adhesion between rubber powder modified asphalt and stone is better than that of SBS modified asphalt. The results of DSR test show that CR has better temperature stability, low temperature crack resistance and high temperature deformation resistance. Two kinds of asphalt mixtures with the same mix ratio were comparatively studied at-15,0,15,30 and 45 鈩，
本文编号：2431209
[Abstract]:(DSR), beam bending creep test and triaxial compression creep test by (SEM), dynamic shear rheological test with scanning electron microscope, The microstructure of rubber powder modified asphalt (CR) and SBS modified asphalt and the effect of low temperature and high temperature on the rheological properties of the asphalt and its mixture were studied from the micro and macro aspects respectively. The results of SEM test showed that the modified asphalt and its mixture had different rheological properties. Both rubber powder and SBS modifier can achieve good blending with asphalt, but in asphalt mixture, the adhesion between rubber powder modified asphalt and stone is better than that of SBS modified asphalt. The results of DSR test show that CR has better temperature stability, low temperature crack resistance and high temperature deformation resistance. Two kinds of asphalt mixtures with the same mix ratio were comparatively studied at-15,0,15,30 and 45 鈩，
本文编号：2431209
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