文档介绍：
沥青混合料动态模量试验对比研究#
李强1,2*
(1. 南京林业大学土木工程学院,南京 210037;
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2. 东南大学交通学院,南京 210096)
摘要:采用不同受力模式对三种沥青混合料进行动态模量试验,分析了围压、应力水平、受
力模式等因素对动态模量主曲线的影响,通过 Fillers-Moonan-Tschoegl 和改进 Sigmoidal 模
型表征了围压对移位因子以及动态模量的影响,并将室内试验结果与基于实测弯沉盆的反算
模量进行了比较。结果表明:二次拟合法可以消除主曲线上动态模量极值对移位因子函数的
依赖性;单轴压缩、间接拉伸和弯曲动态模量有显著区别,在低温高频段更明显,三者之间
存在较好的线性关系;在高温低频段,围压对压缩动态模量的影响较显著;沥青混合料弯曲
动态模量对于应变水平较为敏感;室内外动态模量具有较好的一致性。
关键词:道路工程;沥青混合料,动态模量;主曲线;围压;反算模量
中图分类号:U416. 217
Comparison of dynamic modulus tests for asphalt mixtures
LI Qiang1,2
(1. School of Civil Engineering, Nanjing Forestry University, Nanjing 210037;
2. School of Transportation, Southeast University, Nanjing 210096)
Abstract: Dynamic modulus tests were conducted on three asphalt mixtures under different
loading modes. The effects of confining pressure, loading level and loading mode on the master
curve of dynamic modulus were studied. The effects of confining pressure on shift factor and
dynamic modulus were considered using Fillers-Moonan-Tschoegl and improved Sigmoidal
models, respectively. The laboratory tests results pared with backcalculated data based
on deflection basin. It is found that twice-fitting method can eliminate the dependency of dynamic
modulus extremes on shift factor functions. The pressive, indirect tensile and flexural
dynamic modulus values are significantly different, especially at low tempera