微表处专用两性沥青乳化剂表征及应用效果评价

高莉宁，贾秦龙，晏永，郭涛，夏慧芸，陈华鑫

(长安大学 交通铺面材料教育部工程研究中心，陕西 西安 710064)

摘要：微表处中沥青乳化剂的相关性能对改性乳化沥青及稀浆混合料性能至关重要.笔者利用油酸、多胺、有机氯酸以及氯醇等为原料合成了两性沥青乳化剂，分析了乳化剂的红外光谱、表面张力、亲水亲油平衡值(HLB值)；测试了5% SBS掺量改性乳化沥青的性质和稀浆混合料的技术指标.结果显示：乳化剂的临界胶束浓度为2.63×10`(-5) mol/L，此时表面张力46.11 mN/m；乳化剂HLB值为12.7；当乳化剂用量为1.5%时，改性乳化沥青蒸发残留物的25 ℃针入度为6.2 mm，软化点为78.5 ℃，5 ℃延度为35 cm；微表处混合料60 min凝聚力值达到2.4 N·m，为中度成型，浸水1 h和浸水6 h湿轮磨耗值均满足规范要求.

关键词：沥青乳化剂；微表处；改性乳化沥青；油酸

收稿日期:2015-05-01；

修订日期：2015-06-19

基金项目：国家自然科学基金资助项目(51202016)；国家留学基金资助项目(201206565034)；陕西省博士后项目；长安大学大学生创新创业训练计划项目(201310710151)；中央高校基本科研业务费专项资金(0009-2014G1311086、CHD2013G3312019)；长安大学科技创新重点项目资助

作者简介:高莉宁(1978—)，女，陕西铜川人，长安大学教授，硕导，主要从事材料化学研究,E-mail:lngao@chd.edu.cn．

文章编号:1671-6833(2015)05-0030-05

中图分类号：U418.6

文献标志码：A

doi:10.3969/j.issn.1671-6833.2015.05.007

Abstract:The properties of asphalt emulsifier in micro-surfacing are an issue of great importance for modified emulsified asphalt and mixture performance. In this paper, a kind of zwitterionic surfactant which can be used for asphalt emulsifier was synthesized by using oleic acid, polyamine, acid and alcohol containing chloride as starting materials. The synthesized asphalt emulsifier was characterized by means of FT-IR, surface tension and the calculated hydrophilic- lipophilic balance (HLB) value. The properties of 5% SBS modified emulsion asphalt and the technical parameters of slurry mixtures were also tested. The results showed that the critical micelle concentration (CMC) of emulsifier was 2.63×10`(-5) mol/L, the surface tension at CMC was 46.11 mN/m, and the calculated HLB value was 12.7. Furthermore, the modified emulsion asphalt showed the best performance when the concentration of emulsifier was 1.5%, and the modified asphalt emulsion evaporation residue 25 ℃ penetration was 6.2 mm, softening point was 78.5 ℃, 5 ℃ ductility was 35 cm; micro-surfacing mixture 60 min cohesion value reached 2.4 N·m, moderate molding, 1 h and 6 h soaking wet wheel abrasion values were to meet regulatory requirements.

0引言

微表处是采用专用机械设备将聚合物改性乳化沥青、粗细集料、填料、水和添加剂等按照设计配比拌和成稀浆混合料摊铺在原路面上，并且很快开放交通的具有高抗滑和耐久性能的薄层罩面[1].微表处……