静、动抗压回弹模量的试验研究

发布时间：2018-06-06 06:33

本文选题：道路工程 + 静动模量关系　；参考：《公路交通科技》2017年06期

【摘要】：为研究沥青混合料组成设计及静、动态试验方法等对回弹模量的影响规律,进一步完善沥青混合料设计参数,利用MTS-810进行单轴无侧限、顶面法的静、动抗压回弹模量及强度的室内试验。结果表明:沥青混合料强度与模量并无直接关系;混合料级配和沥青品质都会影响回弹模量取值,且相对而言沥青品质的影响较显著。通过研究试验过程中静、动载下材料的变形演化规律,结合开尔文力学模型及沥青混合料黏弹理论分析论证了静、动模量的局限性,表明混合料的黏滞性是影响静、动模量取值的重要因素,并导致所得模量偏小。最后,对静、动模量的线性关系进行研究并得到不同公称最大粒径混合料的静动模量转换方程,较现有方程更为准确。
[Abstract]:In order to study the influence of asphalt mixture composition design and static and dynamic test methods on the modulus of resilience, the design parameters of asphalt mixture are further improved, and the uniaxial static method with no side limit and top surface method is carried out by using MTS-810. Laboratory test of modulus and strength of dynamic compressive resilience. The results show that there is no direct relationship between the strength and modulus of asphalt mixture, and both the gradation and the quality of asphalt will affect the modulus of resilience, and the effect of asphalt quality is relatively significant. Through studying the deformation and evolution law of materials under static and dynamic loading, combining with Kelvin mechanics model and viscoelastic theory of asphalt mixture, the limitation of static and dynamic modulus is proved. The dynamic modulus is an important factor to determine the dynamic modulus, and the resulting modulus is small. Finally, the linear relationship between static and dynamic modulus is studied and the conversion equations of static and dynamic modulus of mixture with different nominal maximum particle sizes are obtained, which is more accurate than the existing equations.
【作者单位】：长沙理工大学交通运输工程学院;交通运输部公路科学研究院;东南大学交通学院;
【基金】：国家自然科学基金项目(51678078) 湖南省研究生科研创新项目(CX2015B351)
【分类号】：U414

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