Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Research on the Shrinkage Performance of Vertical Vibration Compacted Cement-Stabilized Gravel
https://orcid.org/http://orcid.org/0000-0002-8818-5702
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.
Research on the Shrinkage Performance of Vertical Vibration Compacted Cement-Stabilized Gravel
https://orcid.org/http://orcid.org/0000-0002-8818-5702
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.
Research on the Shrinkage Performance of Vertical Vibration Compacted Cement-Stabilized Gravel
https://orcid.org/http://orcid.org/0000-0002-8818-5702
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.
Research on the Shrinkage Performance of Vertical Vibration Compacted Cement-Stabilized Gravel
Iran J Sci Technol Trans Civ Eng
Jiang, Yingjun (Autor:in) / Bai, Chenfan (Autor:in) / Fan, Jiangtao (Autor:in) / Zhang, Yu (Autor:in) / Yuan, Kejia (Autor:in) / Deng, Changqing (Autor:in)
01.10.2024
14 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Research on the Shrinkage Performance of Vertical Vibration Compacted Cement-Stabilized Gravel
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