摘要
为了研究半刚性基层材料的模量特性,应用UTM材料试验机测试了3种水泥剂量的半刚性基层材料(CBG-25)在抗压和弯拉模式下的动、静态模量和相位角,分析水泥剂量、应力水平、频率、测试方法对半刚性基层材料模量和相位角的影响。结果表明:半刚性基层材料在抗压和弯拉模式下具有不同的应力依赖特性,随着应力水平的增加,抗压模量逐渐增大而弯拉模量逐渐减小;相位角随着加载频率的增加逐渐减小,抗压模式相位角为3.0°~7.2°,弯拉模式相位角为5.0°~7.1°;动态抗压模量为静态抗压模量的1.8~2.8倍,动态弯拉模量为静态弯拉模量的1.2~1.4倍,弯拉模量远大于抗压模量;顶面法动态抗压模量与侧面法动态抗压模量数值相当,顶面法抗压相位角大于侧面法抗压相位角;半刚性材料的强度和模量随着水泥剂量的提升而逐渐增大,而相位角呈逐渐减小趋势。
In order to research the modulus property of semi-rigid base materials, the dynamic moduli, static moduli and phase angles of semi-rigid base material CBG-25 with 5 cement contents in compression and flexural-tension modes are tested using universal testing machine. The influence of cement content, stress level, frequency and testing method on the modulus and the phase angle is analysed. The result shows that （1） the stress-dependence character of the semi-rigid base materials in compression mode is different from the character in flexural-tension mode, with the increase of stress level, the compression modulus increases gradually while the flexural-tensile modulus decreases; （2） the phase angle decreases gradually as the loading frequency increasing, the phase angle＇s value is 3.0° -7.2° in compression mode and 5.0° -7. 1° in flexural-tension mode ; （3） the compression dynamic modulus is 1.8 - 2. 8 times greater than compression static modulus, and the flexural-tensile dynamic modulus is 1.2 - 1.4 times greater than the flexural-tensile static modulus, the flexural-tensile modulus is much greater than the compression modulus; （4） the dynamic compression modulus obtained by side measuring corresponds closely to the dynamic compression modulus material, while the phase angle presents decrement trend.
出处
《公路交通科技》
CAS
CSCD
北大核心
2017年第6期53-60,共8页
Journal of Highway and Transportation Research and Development
关键词
道路工程
半刚性基层材料
模量试验
动态模量
弯拉模量
相位角
road engineering
semi-rigid base material
modulus test
dynamic modulus
flexural tensile modulus
phase angle
