自修复微胶囊对沥青结合料流变特性的影响研究  

Effect of self-healing microcapsules on rheological properties of asphalt binder

作　　者：张蓓[1] 姚亚锋[1,2] 张辉 ZHANG Bei;YAO Yafeng;ZHANG Hui(School of Architecture Engineering,Nantong Vocational University,Nantong 226007,China;School of College of Civil Engineering,Anhui Jianzhu University,Hefei 232002,China)

机构地区：[1]南通职业大学建筑工程学院,江苏南通226007 [2]安徽建筑大学土木工程学院,安徽合肥230022

出　　处：《人民长江》2021年第11期183-189,共7页Yangtze River

基　　金：江苏省建设系统科技计划项目(2017ZD062);南通市科技计划项目(MSZ21040);江苏省高校青蓝工程项目。

摘　　要：微胶囊被认为是增强沥青材料自愈能力的一种潜在添加剂。将自修复微胶囊添加到沥青中有利于减少裂纹,延长沥青路面服役寿命。目前对于微胶囊的研究主要集中于新材料新工艺的研发、微观及宏观性能表征,而对于微胶囊掺入后对沥青结合料性质的影响研究较少。因此,基于动态剪切流变试验,研究了不同掺量的微胶囊对沥青结合料流变特性的影响,包括高温流变特性、低温流变特性、疲劳特性及存储稳定性。结果表明:微胶囊的添加对沥青结合料的存储稳定性有一定不利影响,但有利于提高沥青结合料的高温性能、低温性能及疲劳性能。因此,微胶囊的添加能够有效延长沥青路面的服役寿命,研究结果有利于微胶囊在沥青路面中的推广及应用。Micro capsule technology exhibits great potential in improving the self-healing capability,enhancing the resistance to the crack and prolonging the service life of the asphalt pavement.Previous researches mainly focused on material selection,preparation methods,and microscopic and macroscopic characterization,while few studies focused on the influence of micro capsule on the properties of asphalt binder.This study aims to investigate the effect of micro capsule content on the rheological properties of asphalt binder.The high-temperature rheological properties,low-temperature rheological properties,fatigue properties and storage stability of asphalt binder with the addition of the micro capsule were characterized by means of the dynamic shear rheological test.The results indicated that the micro capsule improved the high temperature performance,low temperature performance and fatigue performance of the asphalt binder,whereas it had a negative effect on the storage stability of the asphalt binder.Therefore,the micro capsule technology may effectively prolong the service life of asphalt pavement,and the research was beneficial to the promotion and application of micro capsule in asphalt pavement.

关 键 词：沥青 流变特性 疲劳特性 动态剪切流变试验 存储稳定性 微胶囊 自修复 

分 类 号：U412.38[交通运输工程—道路与铁道工程]