Paving density recognition based on the vibration characteristics of a screed device

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Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (14) : 237-244.

LUO Qingyun1, LIU Honghai1, WU Ping2, SHI Yanni1

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Abstract

To detect the paving mixture density, the contact mode between tamper and mixture was analyzed. According to contact mode between tamper and mixture, screed device vibration was divided into four states. Two-degree-of-freedom vibration model was established. The model was solved by Newmark-β method. Screed device displacement and acceleration during paving operation were obtained. The relations between screed displacement amplitude、acceleration amplitude and screed vibrator frequency、tamper frequency、mixture characteristics were analyzed. Screed device acceleration frequency spectrum was obtained. Experimental research was carried out. The results show that the screed device acceleration spectrum contains the screed vibrator frequency、the tamper frequency and its harmonic components. The amplitude ratio of tamper main frequency to screed vibrator main frequency in acceleration spectrum increases with paving mixture density, which can be used to detect paving mixture density. The research results can provide references for detecting paving density and improving pavement quality.

Key words

Road Engineering / Paver / Screed Device / Impact Contact / Paving Density / Frequency Spectrum Analysis

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LUO Qingyun1, LIU Honghai1, WU Ping2, SHI Yanni1. Paving density recognition based on the vibration characteristics of a screed device[J]. Journal of Vibration and Shock, 2023, 42(14): 237-244

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