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Cenospheres are lightweight, hollow spherical artefacts that are extracted from fly ash for specialised industrial applications. However, there is a growing concern that this extraction process could potentially alter the physicochemical and mechanical properties of the residue pulverised fly ash (RPFA), leading to a trade-off between continued extraction and discontinuation or even exploring ways of improving the RPFA. To explore the extent of this impact, this study experimentally investigated the physicochemical and mechanical properties of cement paste and concrete partially replaced with 10% to 40% pulverised fly ash (PFA) and RPFA. Samples from four Malaysian coal-powered plants were analysed. The results revealed an increase in PRFA amorphousness with a surface area between 8% - 37%, a decrease in residual density by 1.5% - 12%, workability by 10% - 35%, compressive strength by 3% - 10% and flexural strength by 13% - 10%.

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Evaluating the Influence of Cenosphere Extraction on Physicochemical and Mechanical Performance of Residual Pulverised Fly Ash (RPFA) Incorporated Concrete

  • 会议论文

  • 发表日期：

    2025年

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  • Idris Ahmed Jae,
  • Amirul Ashraf Norsalam,
  • S. M. M. Shaik Ahmad Fadzil,
  • Zarina Itam,
  • Agusril Syamsir,
  • Nazirul Mubin Zahari,
  • Mohd Hafiz Zawawi,
  • Zakaria Che Muda,
  • Faizatul Shimal Mehamod

摘要

Cenospheres are lightweight, hollow spherical artefacts that are extracted from fly ash for specialised industrial applications. However, there is a growing concern that this extraction process could potentially alter the physicochemical and mechanical properties of the residue pulverised fly ash (RPFA), leading to a trade-off between continued extraction and discontinuation or even exploring ways of improving the RPFA. To explore the extent of this impact, this study experimentally investigated the physicochemical and mechanical properties of cement paste and concrete partially replaced with 10% to 40% pulverised fly ash (PFA) and RPFA. Samples from four Malaysian coal-powered plants were analysed. The results revealed an increase in PRFA amorphousness with a surface area between 8% - 37%, a decrease in residual density by 1.5% - 12%, workability by 10% - 35%, compressive strength by 3% - 10% and flexural strength by 13% - 10%.