摘要
针对在超热条件下改性沥青混合料稳定性能进行了试验研究.试验以240℃作为混合料的老化温度,对基质沥青和两种改性沥青进行混合料实验,通过对不同时间下老化后的3种沥青混合料性能进行测量.研究表明:在240℃条件下,三者稳定度基本上随时间的延长不断下降,整体上稳定度变化大小为:基质沥青>SBS改性沥青>高粘度改性;经过改性后,SBS改性沥青和高粘度改性沥青的损失率相较于基质沥青分别下降58%、74%,因此沥青经过改性之后对于粘度大大提升,飞散损失质量下降;在施工条件为超热老化条件下时,可选用SBS改性沥青和高粘度改性沥青,其路面使用性能得到有效提升,抗老化性增强.
In this paper,the stability of modified asphalt mixture under super thermal condition is studied.In the experiment,240℃is used as the aging temperature of the mixture,and the performance of the base asphalt and two kinds of modified asphalt is tested.The results show that:at 240℃,the stability of the three kinds of asphalt decreases with time,and the overall stability changes are:base asphalt>SBS modified asphalt>high viscosity modified asphalt;after modification,the loss rate of SBS modified asphalt and high viscosity modified asphalt decreased by 58%and 74%respectively compared with that of matrix asphalt.therefore,after the modification,the viscosity of asphalt increased greatly and the mass loss of fly loss decreased;under the condition of super heat aging,SBS modified asphalt and high viscosity modified asphalt can be selected,and the pavement performance is improved effectively and the aging resistance is improved.
作者
毛锦伟
梁甲
MAO Jinwei;LIANG Jia(College of Civil Engineering&Architecture,China Three Gorges University,Yichang,Hubei 443002,China)
出处
《江苏建筑职业技术学院学报》
2020年第1期28-31,共4页
Journal Of Jiangsu Vocational Institute of Architectural Technology
关键词
基质沥青
改性沥青
超热老化
稳定性
matrix asphalt
modified asphalt
epithermal aging
stability
