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<p>Experimental and theoretical results on the performance of coal gasification slag bidirectional concrete slabs were used to evaluate the utilization of coal gasification slag (CGS) as a solid waste in the construction industry. Four bidirectional concrete slabs were examined using the concentrated load method. Among them, C40 was a regular concrete slab without CGS, whereas C30Z20, C40Z20, and C50Z20 were three types of concrete slabs with three kinds of strength prepared by replacing 20% of the cement with CGS. By observing the failure behavior of the slabs, the bending bearing capacity, ductility, deflection, and other properties were obtained. The results showed that the CGS concrete slabs had better bearing capacity and ductility than the regular concrete slabs. The bearing capacity of C40Z20 was 18.2% higher than that of C30Z20 and 23.1% higher than that of C50Z20. At the same time, the ductility of the slabs increased with increasing concrete strength. In addition, the limit bearing capacity expansion coefficient µ was obtained using linear regression analysis. The calculated results using the corrected formula were generally consistent with the test values, and a high correlation between the calculated and test results was attained. Moreover, the mechanical properties of the CGS concrete slabs were compared with those of concrete slabs containing different fibers, and the superior performance of the CGS concrete slabs was confirmed.</p>

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Bidirectional Slab Bending and Damage Performance of Coal Gasification Ash Concrete

  • 期刊论文

  • 发表日期：

    2025年3月17日

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  • Chunyun Wang,
  • Ziyi Mao,
  • Yan Gao,
  • Kang Ma,
  • Ruoyang Wu,
  • Zhihui Liu,
  • Lingling Gao

摘要

Experimental and theoretical results on the performance of coal gasification slag bidirectional concrete slabs were used to evaluate the utilization of coal gasification slag (CGS) as a solid waste in the construction industry. Four bidirectional concrete slabs were examined using the concentrated load method. Among them, C40 was a regular concrete slab without CGS, whereas C30Z20, C40Z20, and C50Z20 were three types of concrete slabs with three kinds of strength prepared by replacing 20% of the cement with CGS. By observing the failure behavior of the slabs, the bending bearing capacity, ductility, deflection, and other properties were obtained. The results showed that the CGS concrete slabs had better bearing capacity and ductility than the regular concrete slabs. The bearing capacity of C40Z20 was 18.2% higher than that of C30Z20 and 23.1% higher than that of C50Z20. At the same time, the ductility of the slabs increased with increasing concrete strength. In addition, the limit bearing capacity expansion coefficient µ was obtained using linear regression analysis. The calculated results using the corrected formula were generally consistent with the test values, and a high correlation between the calculated and test results was attained. Moreover, the mechanical properties of the CGS concrete slabs were compared with those of concrete slabs containing different fibers, and the superior performance of the CGS concrete slabs was confirmed.