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This study investigated the performance of an innovative low-carbon concrete (LCC) produced by partially replacing Portland cement with recycled wood fiber (WF), RCBPand AA-GGBFS. The primary aim was to evaluate the effects of various material ratioson on the microstructure and mechanical properties of LCC by experiments. By setting different control groups, they were subjected to curing at ambient temperature for durations of 7 and 28 days, respectively, to enable thorough testing and analysis, encompassing compressive strength and hydration products,, microstructure, thermogravimetric analysis. The findings indicated that the optimal substitution rate for RCBP was determined to be 20%, with a corresponding AA-GGBFS substitution rate of 60%, and a mass ratio of WF to RCBP was 1: 4. At these levels of substitution, the produced LCC paste exhibited commendable compressive strength. From the perspective of environmental and economic analysis, The carbon dioxide emissions per unit of concrete produced across all experimental groups were markedly lower than those associated with conventional Portland cement concrete, and the highest effective carbon reduction efficiency was as high as 70%. Overall, this study has further deepened the utilizationof RCBP to promote the sustainability of raw materials in tunnel engineering.

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Effect of Wood Fiber on Strength and Microstructure of Alkali-Activated-Slag-Based Low Carbon Concrete Containing Recycled Clay Brick Powder

  • 会议论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年

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  • Saijun Cao,
  • Lu He,
  • Dawei Lv,
  • Yue Ma,
  • Tong Wu

摘要

This study investigated the performance of an innovative low-carbon concrete (LCC) produced by partially replacing Portland cement with recycled wood fiber (WF), RCBPand AA-GGBFS. The primary aim was to evaluate the effects of various material ratioson on the microstructure and mechanical properties of LCC by experiments. By setting different control groups, they were subjected to curing at ambient temperature for durations of 7 and 28 days, respectively, to enable thorough testing and analysis, encompassing compressive strength and hydration products,, microstructure, thermogravimetric analysis. The findings indicated that the optimal substitution rate for RCBP was determined to be 20%, with a corresponding AA-GGBFS substitution rate of 60%, and a mass ratio of WF to RCBP was 1: 4. At these levels of substitution, the produced LCC paste exhibited commendable compressive strength. From the perspective of environmental and economic analysis, The carbon dioxide emissions per unit of concrete produced across all experimental groups were markedly lower than those associated with conventional Portland cement concrete, and the highest effective carbon reduction efficiency was as high as 70%. Overall, this study has further deepened the utilizationof RCBP to promote the sustainability of raw materials in tunnel engineering.