硫化杜仲胶改性沥青的微观结构及热解过程分析

Analysis of Microstructure and Pyrolysis Process of Vulcanized Eucommia Ulmoides Gum Modified Asphalt

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CO_(2)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.

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 CO_(2) 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.