[关键词]
[摘要]
以天然植物基杜仲胶(EUG)为原料,制备了硫化杜仲胶改性沥青(VEUGMA),并对其微观结构和热解过程进行了研究.结果表明:与基质沥青相比,VEUGMA具有更小的针入度、更高的软化点、更大的延度和黏度,以及较好的高温抗变形和低温抗裂能力;与基质沥青相比,VEUGMA蜂型结构数量更多且尺寸更小,均方根粗糙度更小,黏附力更大,热解温度更高,以及CO2和CO释放量更小;在基质沥青中加入6%EUG和3.5%硫磺(以EUG质量计)取得的改性效果最佳.
[Key word]
[Abstract]
Vulcanized eucommia ulmoides gum modified asphalt(VEUGMA) was prepared by natural plant-based eucommia ulmoides gum(EUG), and the microstructure and pyrolysis process of VEUGMA were studied. The results show that VEUGMA is of lower penetration, higher softening point, larger ductility and viscosity, better deformation resistance at high temperature and cracking resistance at low temperature than matrix asphalt. Compared to matrix asphalt, VEUGMA has larger number and smaller size of honeycomb structures, lower root mean square roughness, greater adhesion, higher pyrolysis temperature, and less CO2 and CO release. The modification effect is the best when 6% EUG and 3.5% sulfur (calculated by EUG quality) are added to the matrix asphalt.
[中图分类号]
U414
[基金项目]
国家自然科学基金资助项目(51308084); 中央高校基本科研业务费专项资金资助项目(3132017029); 大连海事大学“双一流”建设专项项目(BSCXXM021); 辽宁省公路科技创新重点科研项目(201701); 大连市科技创新基金项目(2020JJ26SN062); 辽宁省教育厅基金项目(LJKMZ20220922); 大连市重点科技研发计划项目(2023YF22SN043)