摘要
采用动态剪切流变仪AR-2000对不同TLA掺量的改性沥青在线粘弹范围内进行了动态频率扫描,运用DMA时温等效原理,获得了不同TLA掺量的改性沥青在各个温度下的动态剪切模量主曲线族,结果表明:基于时温等效原理获得的材料宽温宽频范围内的主曲线族频率范围跨跃大,为准确描述不同TLA掺量的改性沥青动态剪切模量的变化趋势提供了条件;TLA改性沥青的动态剪切模量在相同温度下随频率的变化趋势与TLA掺量有关,在双对数坐标下,随TLA掺量的增加,动态剪切模量随频率的变化率逐渐减小,对频率的依赖性越来越好。
Dynamic frequency sweep tests are performed using dynamic shear rheometer AR-2000 for different dosage of modified asphalt TLA in viscoelastic range line,the use of DMA time-temperature equivalence principle,to obtain a different TLA modified asphalt in various dosage temperature dynamic shear modulus master curves,the results show that： the time-temperature equivalence principle based on material obtained within the wide temperature range of broadband frequency range of the main curves big leap for the accurate description of the different dosage of modified asphalt TLA dynamic shear modulus trends provided the conditions;TLA modified asphalt dynamic shear modulus at the same temperature trends with frequency and dosage of the TLA,in double logarithmic coordinates,with the increased dosage of TLA,the dynamic shear modulus versus frequency rate decreases,the frequency dependence is getting better.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2012年第2期45-48,共4页
Journal of Wuhan University of Technology
基金
国家自然科学基金(51038004)
