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<p>This research describes the formulation and experimental assessment of an environmentally sustainable ultra-high-performance concrete (UHPC) embedding both agricultural and industrial by-products. Although individual use of agricultural or ceramic waste in concrete has been explored, the combined effect of palm-based ashes and ceramic waste as fine aggregates (CWFA) on UHPC’s properties remains insufficiently investigated. Palm oil ash (POA) and palm leaf ash (PLA) were incorporated as partial substitutes for Portland cement (PC) in proportions of 10%, 20%, 30%, 40%, and 50%; concurrently, CWFA substituted quartz sand at replacement levels of 25%, 50%, 75%, and 100%. Nineteen distinct concrete mixtures were thus prepared and evaluated. Performance metrics comprised slump flow, compressive strength, permeability, scanning electron microscopy (SEM) analysis, and compressive strength retention under elevated-temperature conditions. Data revealed that the introduction of POA and PLA to an extent of 30% generally elevated the compressive strength in comparison to the reference matrix. The most effective mixture, POA30-C100, attained a peak compressive strength of 205.5 MPa at 90 days, exceeding the reference strength of 172.4 MPa. These results underscore the viability of repurposing agricultural and industrial residues for the sustainable fabrication of high-performance UHPC, thereby enhancing both material performance and ecological stewardship.</p>

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Influence of palm oil ash and palm leaf ash on the properties of ultra-high-performance concrete incorporating ceramic waste as fine aggregate

  • 期刊论文

  • 发表日期：

    2025年9月21日

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  • Abdullah M. Zeyad,
  • Ashraf M. Heniegal,
  • Mohamed Amin,
  • Ibrahim Saad Agwa,
  • Mahmoud H. Abd-Elrahman

摘要

This research describes the formulation and experimental assessment of an environmentally sustainable ultra-high-performance concrete (UHPC) embedding both agricultural and industrial by-products. Although individual use of agricultural or ceramic waste in concrete has been explored, the combined effect of palm-based ashes and ceramic waste as fine aggregates (CWFA) on UHPC’s properties remains insufficiently investigated. Palm oil ash (POA) and palm leaf ash (PLA) were incorporated as partial substitutes for Portland cement (PC) in proportions of 10%, 20%, 30%, 40%, and 50%; concurrently, CWFA substituted quartz sand at replacement levels of 25%, 50%, 75%, and 100%. Nineteen distinct concrete mixtures were thus prepared and evaluated. Performance metrics comprised slump flow, compressive strength, permeability, scanning electron microscopy (SEM) analysis, and compressive strength retention under elevated-temperature conditions. Data revealed that the introduction of POA and PLA to an extent of 30% generally elevated the compressive strength in comparison to the reference matrix. The most effective mixture, POA30-C100, attained a peak compressive strength of 205.5 MPa at 90 days, exceeding the reference strength of 172.4 MPa. These results underscore the viability of repurposing agricultural and industrial residues for the sustainable fabrication of high-performance UHPC, thereby enhancing both material performance and ecological stewardship.