- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | JIA Jie, YANG Xiaoyu, LIU Honghai, WAN Yipin. Compaction Characteristics of Paver Tamper to Mixture Considering Shock Load[J]. Journal of Southwest Jiaotong University, 2022, 57(6): 1277-1283. doi: 10.3969/j.issn.0258-2724.20210795
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To improve the initial density of a paving mixture behind the paver, the research of the dynamic characteristics of tamper is needed. In the impact compaction, the vibration shock force will impact mixture. A simulation model reflecting the relationship between paving material compactness and vibration parameters, system parameters was established to analyze the relationship between the compactness and dynamic response of the tamper, and reveal compaction mechanism of tamper. By testing the paving compaction effect of the tamper on the mixture, the paving compactness-frequency curve was obtained. Through analysis of the model with different damping coefficients, the best vibration frequency corresponding to maximum density peak could be determined. Meanwhile the influence of vibration frequency on paving density was analyzed through simulation and experiment. The results show that, when the frequency ratio is less than the best vibration frequency ratio, mixture compactness is sensitive to vibration frequency, and the compactness changes gently with increasing frequency when vibration frequency is larger than the best vibration frequency ratio, so the simulation results are basically consistent with the experimental results. When the vibrating frequency is close to the best vibrating frequency, besides the steady-state response with the same excitation frequency, there is a harmonic vibration component whose frequency is equal to 2 times the excitation frequency. When the frequency ratio is greater than 0.45, the high compacting effect would be obtained for the paving mixture. The research results provide the basis for pavement effective compaction.
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