Investigation of vibration compaction transfer characteristics of asphalt pavement for high-density
JIA Jie1, ZENG Xiaolong1, LIU Honghai1, YANG Haitao2, WAN Yipin1
1.Key Laboratory of Road Construction Technology and Equipment, Ministry of Education, Chang’an University, Xi’an 710064, China;
2.Gansu Luqiao Third Highway Engineering Co., Ltd., Lanzhou 730030, China
Abstract:To improve the initial density of asphalt pavement behind the paver, it is necessary to study the compaction transfer characteristics of the paver vibrating device to the mixture. Aiming at the dynamic compaction system composed of vibrating device and materials, considering the material characteristics of lower layer, the dynamic model of the interaction between vibrating device and asphalt mixture is established, and the theoretical calculation method of compaction transfer force and compaction transfer rate is proposed. Taking the compaction transfer force as the compaction capacity parameter and the compaction transfer rate as the compaction efficiency parameter during tampering compaction, the effect of vibration frequency, asphalt mixture characteristics and the stiffness of the lower layer on the vibration compaction transfer characteristics is studied. At the same time, the range of vibration parameters for high-density paving of asphalt pavement is obtained. Then, based on the compaction transfer characteristic parameters, the relationship between vibration compaction transfer force, compaction transfer coefficient and paving density is discussed, and simulation analysis and test are carried out. The results show that the frequency is 10% (about 4Hz) of the maximum vibration frequency, the first peak density is 87%, and then the density gradually decreases. When the frequency is 45% (about 15Hz), it reaches 84% of the low compactness section and then gradually increases. Furthermore, the vibration frequency percentage is 65% (about 22Hz), reaching 88% of the second peak density, and the density gradually increases. Therefore,there is a relationship between density and theoretical calculation results of the compaction transfer force. In the range less than 22Hz of the vibration frequency, the vibration compaction transfer force can be used as the characteristic parameter of the paving density. Research can provide the basis for the high-density paving and effective compaction of paver to mixture.
贾洁1,曾小龙1,刘洪海1,杨海涛2,万一品1 . 沥青路面高密实振捣压实传递特性研究[J]. 振动与冲击, 2023, 42(16): 306-318.
JIA Jie1, ZENG Xiaolong1, LIU Honghai1, YANG Haitao2, WAN Yipin1. Investigation of vibration compaction transfer characteristics of asphalt pavement for high-density. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(16): 306-318.
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