| 摘要: |
| 以70#石油沥青、SBS改性沥青和高模量改性沥青为研究对象,通过流变试验，定量研究了高模量改性剂掺量对沥青黏弹特性的影响,并与SBS改性沥青进行了对比分析,结合荧光显微试验，研究了高模量改性剂的改性机理；基于车辙试验和动态模量试验，分析比较了高模量改性沥青混合料和SBS改性沥青混合料在路用性能方面的差异.结果表明：高模量改性剂在改善基质沥青的高温性能和黏弹性能方面具有良好的效果,其掺量为667%时改性效果优于SBS改性沥青;高模量改性剂颗粒可以在沥青中溶胀发育,形成聚合物链接,改善了沥青的黏弹特性;与SBS改性沥青混合料相比,高模量改性沥青混合料的抵御变形能力更好,在高温地区的使用性能优越. |
| 关键词: 道路工程 高模量改性剂 作用机理 抗车辙能力 |
| DOI：103969/j.issn.1007 9629202102018 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（51778140）；江苏省研究生科研与实践创新计划项目（SJCX18_0044） |
|
| Mechanism and Application of High Modulus Agent |
|
LU Guilin, XU Xinquan, TANG Zhiyun, YANG Jun
|
|
School of Transportation, Southeast University, Nanjing 211189, China
|
| Abstract: |
| The performance of 70# petroleum asphalt, SBS modified asphalt and high modulus modified asphalt were studied. The effects of high modulus agents on the viscoelastic properties of asphalt of different dosages were quantitatively studied through rheological test. The influence of high modulus agent on viscoelastic properties of asphalt was also compared with SBS modified asphalt, and the modification mechanism of high modulus agent was studied by fluorescence microscopy. Based on rutting test and dynamic modulus test, the differences in road performance between high modulus modified asphalt mixture and SBS modified asphalt mixture were compared. The results show that the high modulus agent has good effect in improving the high temperature performance and viscoelastic properties of the virgin asphalt. When the dosage reaches 667%, the modification effect is better than that of SBS modified asphalt. The high modulus agent particles can swell in the asphalt to form polymer links that improve the viscoelastic properties of the asphalt. The high modulus modified asphalt mixture has better resistance to deformation than the SBS modified asphalt mixture, and has superior performance in high temperature areas. |
| Key words: road engineering high modulus agent modification mechanism rutting resistance |
