基于活化特性的橡胶沥青性能及其改性机理研究

发布时间：2018-07-24 10:54

【摘要】：为了改善和提高橡胶沥青性能,采用次氯酸钠活化橡胶粉的方法,并结合扫描显微电镜(SEM)、红外光谱(FTIR)、粘度及动态剪切流变仪(DSR)对活化橡胶沥青的微观及宏观性能进行研究。测试结果表明:次氯酸钠活化可使胶粉和沥青之间的接触面积相应增大,同时增加胶粉表面的活性成分,提高胶粉与基质沥青间的相容性;活化胶粉可显著降低橡胶沥青粘度,且胶粉掺量越大,降粘效果越明显,从而提高沥青路面施工和易性;活化橡胶沥青的车辙因子略大于普通橡胶沥青的车辙因子,说明次氯酸钠活化对于橡胶沥青高温性能有一定的改善作用;橡胶沥青活化前后的FTIR图谱没有明显的吸收峰变化,未产生新的官能团,说明次氯酸钠活化在橡胶沥青体系中仅起到增容的作用。
[Abstract]:In order to improve the properties of rubber asphalt, the microcosmic and macroscopic properties of activated rubber asphalt were studied by means of sodium hypochlorite activated rubber powder, (FTIR), viscosity and dynamic shear rheometer (DSR) combined with scanning electron microscope (SEM) (SEM), infrared spectroscopy (FTIR),) and dynamic shear rheometer (DSR). The results show that activation of sodium hypochlorite can increase the contact area between rubber powder and asphalt, increase the active component on the surface of rubber powder, improve the compatibility between rubber powder and base asphalt, and activate rubber powder can significantly reduce the viscosity of rubber asphalt. The greater the amount of rubber powder is, the more obvious the viscosity reduction effect is, thus improving the construction and ease of asphalt pavement, the rutting factor of activated rubber asphalt is slightly higher than the rutting factor of ordinary rubber asphalt, The results show that the activation of sodium hypochlorite can improve the high temperature performance of rubber asphalt, and the FTIR spectrum of rubber asphalt before and after activation has no obvious change of absorption peak, and no new functional group is produced. The results show that the activation of sodium hypochlorite can only increase the compatibilization in rubber asphalt system.
【作者单位】：云南富砚高速公路有限公司;
【分类号】：U414

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