TLA掺量对ATB-25混合料路用性能的影响  

The Affect of TLA Content on Road Performance of ATB-25 Mixes

作　　者：刘冉冉[1] 杨春景[1] 

机构地区：[1]黄河水利职业技术学院水利系,河南开封475004

出　　处：《公路工程》2016年第4期302-306,共5页Highway Engineering

摘　　要：以小型加速加载试验(MMLS3)、小梁弯曲试验为基础试验平台,研究了特立尼达湖沥青掺量对沥青稳定碎石混合料的高低温性能以及疲劳性能的影响。试验结果表明:TLA的添加可显著改善ATB混合料的高温稳定性,10%TLA掺量可使ATB混合料疲劳寿命提高1倍;掺加5%、7.5%、10%TLA,可使ATB混合料的最大弯拉应变分别增加10.4%、21.2%、13.6%,最大弯拉应变和破坏应变能随TLA掺量的增大呈抛物线变化规律;TLA改性ATB混合料疲劳寿命远大于基质沥青,且随着TLA掺量增加,改性沥青混合料的疲劳试验双对数拟合截距K值增大,斜率n值减小。this article use MMLS3, trabecular bending test as test platform to study the effects of Trinidad Lake bitumen content on high and low temperature performance, and fatigue properties, of ATB -25 Mixes. The results showed that：the add of TLA can significantly improve the high temperature sta- bility ATB mix,after add 10% TLA can increase the fatigue life of ATB-25 1 times;adding 5%, 7.5% 10% TLA, ATB can mix the maximum bending material tensile strain increased 10. 4% , 21. 2% , 13.6% , the maximum bending tensile strain and damage strain energy with increasing dosage of TLA parabolie variation;TLA modified ATB mix asphalt is much larger than the fatigue life,and with the TLA content increases,the fatigue test double-modified asphalt mixture fit logarithmic intercept K value increases,the slope of the n value decreases.

关 键 词：路面工程 特立尼达胡沥青 沥青稳定碎石混合料 路用性能 

分 类 号：U414.1[交通运输工程—道路与铁道工程]