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Research on the Shrinkage Performance of Vertical Vibration Compacted Cement-Stabilized Gravel

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Iranian Journal of Science and Technology, Transactions of Civil Engineering Aims and scope Submit manuscript

Abstract

This study investigates the shrinkage performance of cement-stabilized gravel (CSG) compacted using vertical vibrations. The reliability of the vertical vibration compaction method (VVCM) for preparing CSG was confirmed by comparing the mechanical properties of different laboratory compaction specimens with field core samples. The factors influencing shrinkage deformations of CSG were investigated. Based on fracture mechanics, a pair of shrinkage cracking coefficients were proposed to represent the shrinkage cracking of CSG, and the shrinkage cracking performance of CSG was quantified to assess the effect of gradation and cement content on shrinkage cracking. The mechanical strength of VVCM-compacted CSGs was found to exhibit a correlation of 91% with the field core samples. Most of the drying-shrinkage deformation of CSG occurs within the first 15 d (> 85% of the total), during which it increased linearly with the amount of water loss. The resistance of a skeleton dense gradation to drying- and temperature-shrinkage deformations was superior to that of a suspended dense gradation. Moreover, increasing dust and cement contents exacerbated the shrinkage deformation of CSG. The skeleton dense gradation had the best shrinkage cracking resistance, and an excess dust content worsened the shrinkage cracking of CSG. Increasing cement content resulted in higher drying-shrinkage deformation but did not considerably affect shrinkage cracking.

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The datasets generated or analyzed during this study are available from the corresponding author on reasonable request.

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Acknowledgements

The authors gratefully acknowledge their financial support. And special thanks also go to Key Laboratory for Special Area Highway Engineering of Ministry of Education.

Funding

This research is supported by the Scientific Project of Shannxi Provincial Transportation Department (Grant No. 21-48K), and Scientific Project of Hunan Provincial Education Department (Grant No. 22B0752).

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Correspondence to Chenfan Bai.

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Jiang, Y., Bai, C., Fan, J. et al. Research on the Shrinkage Performance of Vertical Vibration Compacted Cement-Stabilized Gravel. Iran J Sci Technol Trans Civ Eng (2024). https://doi.org/10.1007/s40996-024-01424-7

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  • DOI: https://doi.org/10.1007/s40996-024-01424-7

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