Volume 25 Issue 5
Oct.  2025
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FU Jun, YANG Miao, QIU Hong-an, SUN Zhao, DING Qing-jun, ZHANG Gao-zhan. Pushing test and bonding performance of LUHPC outsourcing steel tube with all-solid waste coal gangue aggregate[J]. Journal of Traffic and Transportation Engineering, 2025, 25(5): 250-262. doi: 10.19818/j.cnki.1671-1637.2025.05.017
Citation: FU Jun, YANG Miao, QIU Hong-an, SUN Zhao, DING Qing-jun, ZHANG Gao-zhan. Pushing test and bonding performance of LUHPC outsourcing steel tube with all-solid waste coal gangue aggregate[J]. Journal of Traffic and Transportation Engineering, 2025, 25(5): 250-262. doi: 10.19818/j.cnki.1671-1637.2025.05.017
shu

Pushing test and bonding performance of LUHPC outsourcing steel tube with all-solid waste coal gangue aggregate

doi: 10.19818/j.cnki.1671-1637.2025.05.017
  • 1.

    Faculty of Transportation and Marine Engineering, Wuhan University of Technology, Wuhan 430063, Hubei, China

  • 2.

    State Key Laboratory of Silicate Building Materials, Wuhan University of Technology, Wuhan 430063, Hubei, China

  • 3.

    School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei 230601, Anhui, China

Funds:

National Natural Science Foundation of China U21A20149

  • Received Date: 2024-07-19
  • Accepted Date: 2025-03-15
  • Rev Recd Date: 2024-11-10
  • Publish Date: 2025-10-28
    Abstract
  • Lightweight ultra-high performance concrete (LUHPC) with a density lower than 2 100 kg·m-3 was prepared by using all-solid waste coal gangue aggregates. The mechanical properties of LUHPC were tested. Its damage constitutive model was analyzed, and the quasi-static and dynamic compressive strengths were measured. The interface bonding and pushing resistance performance between the steel tubes and the encased LUHPC were investigated. A scaled-down model of the engineering prototype structure in a 1∶6 ratio was prepared. A pushing test on the all-solid waste coal gangue aggregate LUHPC concrete was conducted using the scaled-down model in the reduced scale. The loading process and failure modes of the scaled-down model were observed. The interface shear adhesion strength was analyzed by compiling and drawing the load-slip curve diagram. The ABAQUS was employed to establish a finite element model of LUHPC-steel pipe concrete. A multi-parameter analysis of the test was carried out using finite element method. Test results show that the quasi-static loading strength of LUHPC containing waste coal gangue aggregate is 92.20 MPa. The dynamic compressive strength increases by 13%~40% compared with the quasi-static strength. Based on the damage constitutive model analysis, the peak stress is 109 MPa, the strain is 3.4×10-3, and the elastic modulus is 37.5 GPa. For the LUHPC-steel tube concrete, the low water-binder ratio in the LUHPC binder material provides a strong bonding effect, and the inclusion of steel fibers effectively enhances the bond performance at the steel tube interface. The bonding strength reaches 1.96 MPa, significantly higher than that of ordinary concrete, which contributes to improved structural safety and integrity. The finite element simulation analysis, considering concrete plastic damage and steel ductile damage, yields a load-slip curve for the entire loading process of the pushing specimen model, which aligns with the experimental curve. The pushing resistance and bonding performance of the specimen can be improved by adjusting the design parameters of the LUHPC-encased steel tube.

     

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