摘要
选用东明70#沥青作为基质沥青(MA),分别掺入沥青质量22%的普通胶粉或深度脱硫胶粉,制备了脱硫橡胶沥青(DRA)和普通橡胶沥青(RA),并拌制了这3种沥青的沥青胶浆;对比分析了橡胶沥青RA和DRA的红外光谱、黏温曲线、有害气体排放量,以及黏附性、存储稳定性、耐老化性及高温性能等。结果表明:DRA相较于RA无新化学键产生,说明DRA与RA所含化学官能团相似;沥青的拌和温度及压实温度,DRA分别为166.20~175.40℃、151.30~157.98℃,RA分别为195.62~205.26℃、179.53~187.19℃,说明RA的高温性能更好;DRA的有害气体排放量约为RA的1/2,说明DRA相对较环保;DRA的低温黏结性、机械搅拌存储稳定性及短期老化后的高温抗车辙性能均优于RA,但抗老化性能及高温抗车辙性能不及RA。建议:DRA可用于对高温性能要求相对较低的地区,而RA由于其环保性较差则应限制使用。
Dongming 70#asphalt was selected as matrix asphalt(MA),and the desulfurized rubber asphalt(DRA)and rubber asphalt(RA)were prepared by mixing 22%ordinary rubber powder or deep desulfurized rubber powder respectively.And three asphalt mortars corresponding to MA,DRA and RA were prepared.Properties of DRA,RA were tested and compared,such as the infrared spectrum,viscosity-temperature curve,harmful gas emission,adhesion,storage stability,aging performance,high temperature performance etc..The test results show that:compared with RA,there is no new chemical bonds in DRA,which shows that DRA and RA contain similar chemical functional groups.The mixing and compaction temperature of DRA are 166.20~175.40℃,151.30~157.98℃respectively,and those of RA are 195.62~205.26℃,179.53~187.19℃respectively,which indicates that RA has better high temperature performance.The harmful gas emission of DRA is about 1/2 of that of RA,indicating that DRA is relatively environmentally friendly.DRA is superior to RA in low-temperature cohesion,mechanical stirring storage stability and high-temperature rutting resistance after short-term aging.However,the aging resistance,high-temperature rutting resistance of DRA are lower than those of RA.It is recommended that DRA can be used in areas where high-temperature performance requirements are relatively low,while RA should be restricted due to its poor environmental protection.
作者
张争奇
方滢
李卓琳
ZHANG Zhengqi;FANG Ying;LI Zhuolin(Key Laboratory for Special Area Highway Engineering of Ministry of Education,Chang an University,Xi’an 710064,Shaanxi,China)
出处
《重庆交通大学学报（自然科学版）》
CAS
CSCD
北大核心
2020年第4期74-79,91,共7页
Journal of Chongqing Jiaotong University(Natural Science)
基金
国家自然科学基金项目(51008031)。
关键词
道路工程
脱硫橡胶沥青
普通橡胶沥青
黏温曲线
低温黏结性
老化性能
highway engineering
desulfurized rubber asphalt(DRA)
rubber asphalt(RA)
viscosity-temperature curve
low-temperature adhesion
aging performance
