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Experimental investigation on dynamic response of asphalt pavement using SmartRock sensor under vibrating compaction loading

机译：振动压实负荷下沥青路面沥青路面动态响应的实验研究

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Although compaction is one of the most critical steps during the construction of asphalt pavements, effective real-time technologies to detect the compactness of the asphalt mixture non-destructively are still rare. Currently, most methodologies in practice are experience-based, and few studies have provided insight into the particle interaction characteristics and quantitative response during the vibration compaction of asphalt pavements. Accordingly, both field and laboratory tests are conducted in this study to investigate the response of an asphalt mixture quantitatively under a vibrating compaction load at the meso-scale. First, a field test program is designed, and sensors (e.g., SmartRock and acceleration sensors) are used to measure the dynamic response of an asphalt pavement and the vibrating drum during vibrating compaction. The quantitative analysis reveals that the first three rolling impacts exert a significant and dominant compact effect on the asphalt mixture. Subsequently, a linear relationship between the acceleration of the vibrating drum and the vertical stress in the asphalt pavement is demonstrated. Furthermore, the SmartRock sensor is also employed in the laboratory test to detect the internal dynamic response under gyratory compaction, and the relationship between the compaction degree and the vertical stress in the asphalt mixture is established. Finally, three assessment methods for asphalt mixture compactness are proposed as characterization of the compactness by the acceleration of a vibrating drum, intermediate variables such as the stress of the mixture under a gyratory compaction, or acceleration and stress of the pavement. Comparison of the results illustrates that the dynamic response inside the mixture during the compaction can directly reflect the compaction degree of the asphalt mixture, and the compaction degree and the peak acceleration of the vibrating drum exhibit a strong linear correlation during the vibration rolling process. (C) 2020 Elsevier Ltd. All rights reserved.
机译：虽然压实是沥青路面建造期间最关键的步骤之一，但有效的实时技术，以检测沥青混合料的紧凑性无损仍然罕见。目前，大多数在实践中的方法是基于经验，很少有研究已经为沥青路面振动压实过程中的颗粒相互作用特性和定量反应提供了洞察力。因此，在该研究中进行了诸域和实验室测试，以研究在中间尺度的振动压实负载下定量地研究沥青混合物的响应。首先，设计现场测试程序，并且使用传感器（例如，Smartrock和加速度传感器）来测量振动压实期间沥青路面和振动滚筒的动态响应。定量分析表明，前三个轧制撞击对沥青混合物产生显着和显着的紧凑效果。随后，证明了振动鼓的加速度与沥青路面中的垂直应力之间的线性关系。此外，Smartrock传感器也用于实验室测试以检测旋转压实下的内部动态响应，并且建立压实程度与沥青混合物中的垂直应力之间的关系。最后，提出了三种沥青混合料紧凑性的评估方法作为通过振动鼓的加速度的紧凑性的表征，例如在陀螺压实下的混合物的应力，或路面的加速度和应力。结果的比较示出了在压实期间混合物内的动态响应可以直接反映沥青混合物的压实程度，并且振动鼓的压实程度和振动鼓的峰值加速度在振动轧制过程中表现出强烈的线性相关性。 （c）2020 elestvier有限公司保留所有权利。

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