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首页> 外文期刊>Construction and Building Materials >Quantitative test technology study on the mesoscopic strength parameters of the mineral aggregate contact surface of bituminous-stabilized macadam
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Quantitative test technology study on the mesoscopic strength parameters of the mineral aggregate contact surface of bituminous-stabilized macadam

机译：沥青稳定碎石矿物集合体接触面介观强度参数的定量测试技术研究

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摘要

Quantitative test technology on the mesoscopic strength parameters of the mineral aggregate contact surface of bituminous-stabilized macadam was studied. On the basis of the failure mechanism of the mineral aggregate contact surface, the HC-40 hydraulic force measurement device and the self-designed test die were used to apply tensile load on the contact surface of the mineral aggregate. The total tensile strength R_r of the mineral aggregate contact surface was calculated. The total tensile strength R_r was compared with the splitting strength R_r of the AM-20 Semi-Open-Graded bituminous-stabilized macadam mixture under different conditions. A corresponding calculation method was used to determine the adhesion strength R_a between the aggregates and bitumen, as well as the cohesion strength R_c of the bitumen binder itself. The results show that despite the small difference in numerical value between the total tensile strength R_r of the mineral aggregate contact surface and the splitting strength R_T of the mixture, the variation law is consistent. The method of calculation adopted in the present study can provide the quantitative test for the adhesion strength R_a and the cohesion strength R_c at different states. The mesoscopic parameters of the mineral aggregate contact surface can directly affect the macroscopic strength parameters of the mixture. The test can promote the study on crack resistance and raveling resistance abilities of bituminous-stabilized macadam mixtures.
机译：研究了沥青稳定碎石矿物集合体接触面介观强度参数的定量测试技术。根据矿物骨料接触面的破坏机理，采用HC-40液压力测量装置和自行设计的试模对矿物骨料接触面施加拉伸载荷。计算出矿物骨料接触表面的总抗拉强度R_r。将总抗拉强度R_r与AM-20半开梯度沥青稳定碎石混合物在不同条件下的劈裂强度R_r进行比较。使用相应的计算方法确定骨料与沥青之间的粘合强度R_a以及沥青粘合剂本身的内聚强度R_c。结果表明，尽管矿物骨料接触表面的总抗拉强度R_r与混合物的劈裂强度R_T之间的数值差异很小，但变化规律是一致的。本研究采用的计算方法可以为不同状态下的粘结强度R_a和内聚强度R_c提供定量测试。矿物骨料接触表面的介观参数可以直接影响混合物的宏观强度参数。该试验可促进沥青稳定碎石混合物的抗裂性和抗撕裂性的研究。

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