羧基对两性沥青乳化剂及乳化沥青性能影响研究  

Effects of Carboxyl Group on Performance of Amphoteric AsphaltEmulsifier and Emulsified Asphalt

作　　者：高莉宁[1] 符小红 贾秦龙[1] 何锐[1] 陈华鑫[1] GAO Lining;FU Xiaohong;JIA Qinlong;HE Rui;CHEN Huaxin(School of Materials Science and Engineering,Chang an University,Xi an 710061,Shaanxi,China)

机构地区：[1]长安大学材料科学与工程学院,陕西西安710061

出　　处：《重庆交通大学学报（自然科学版）》2020年第11期81-85,共5页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：山西交投控股集团有限公司科技项目(18-JKKJ-16)。

摘　　要：为研究羧基对两性沥青乳化剂及其制备的乳化沥青的性能影响,笔者利用油酸、不同摩尔比的二乙烯三胺和氯乙酸合成了三种沥青乳化剂,采用红外光谱、表面活性和亲水亲油平衡值表征其性能,对不同乳化剂制备的乳化沥青性能进行了测试。研究结果表明:随着分子结构中羧基的增加,乳化剂在临界胶束浓度下的表面张力由37.42增加到40.24和43.98 mN/m;亲水亲油平衡值由8.1增大到11.1和13.9,水溶性变好;乳化沥青的破乳速度从中裂变为快裂再到慢裂;乳化沥青蒸发残留物的25℃针入度由8.0减小为7.9和7.6 mm,软化点由47.0升高为47.5和48.5℃,沥青的硬度增大。To study the effect of carboxyl group on the performance of amphoteric asphalt emulsifier and emulsified asphalt prepared from amphoteric asphalt emulsifier,three different asphalt emulsifiers were synthesized by using oleic acid,different molar ratio of diethylene triamine and chloroacetic acid,and their performances were characterized by infrared spectroscopy,surface activity and hydrophilic-lipophilic balance(HLB)value.The performances of emulsified asphalt prepared by different emulsifiers were tested.The research results show that:with the increase of carboxyl group in molecular structure of emulsifier,the surface tension of emulsifier at the critical micelle concentration(CMC)is increased from 37.42 mN/m to 40.24 mN/m and 43.98 mN/m;HLB value is increased from 8.1 to 11.1 and 13.9,which means that the water solubility becomes better;the demulsification rate of emulsified asphalt is from middle fission to fast cracking and then to slow cracking;the penetration at 25℃of emulsified asphalt evaporation residue gradually decreases from 8.0 mm to 7.9 mm and 7.6 mm;the softening point successively increases from 47.0℃to 47.5℃and 48.5℃,and the hardness of asphalt increases.

关 键 词：道路工程 乳化沥青 沥青乳化剂 羧基 表面活性剂 氯乙 

分 类 号：U418.6[交通运输工程—道路与铁道工程]