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<p>Alternative alkaline activators have become necessary to advance geopolymer concrete due to the high carbon emissions and cost associated with traditional activators. Therefore, waste-derived alkaline activators are a way forward from the environmental and economic viewpoint. However, knowledge of the strength and durability of geopolymer concrete using waste-derived activators remains highly limited. This study investigates the compressive strength and durability analysis of geopolymer concrete manufactured with rice husk ash (RHA) derived alkaline activator, an alternative that solves both carbon emissions and cost concerns. Fly ash (FA) and ground granulated blast furnace slag (GGBS) are employed as source materials with varying proportions. The results reveal that the mix containing 60% FA and 40% GGBS reached the highest 28-day compressive strength of 39.1&#xa0;MPa. Durability test results indicate a reduction in strength under acid exposure, while an increment in strength is noted under sulfate attack. In addition, all specimens exhibit very low sorptivity values that suggest better resistance to water penetration. The findings offer vital insights into the alternative alkaline activators in manufacturing geopolymer concrete thereby underscoring their potential.</p>

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Compressive strength and durability analysis of geopolymer concrete manufactured with rice husk ash-derived alkaline activator

  • 期刊论文

  • 发表日期：

    2025年9月19日

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  • Jyotirmoy Mishra,
  • Snehal Soren,
  • Bharadwaj Nanda,
  • Sanjaya Kumar Patro

摘要

Alternative alkaline activators have become necessary to advance geopolymer concrete due to the high carbon emissions and cost associated with traditional activators. Therefore, waste-derived alkaline activators are a way forward from the environmental and economic viewpoint. However, knowledge of the strength and durability of geopolymer concrete using waste-derived activators remains highly limited. This study investigates the compressive strength and durability analysis of geopolymer concrete manufactured with rice husk ash (RHA) derived alkaline activator, an alternative that solves both carbon emissions and cost concerns. Fly ash (FA) and ground granulated blast furnace slag (GGBS) are employed as source materials with varying proportions. The results reveal that the mix containing 60% FA and 40% GGBS reached the highest 28-day compressive strength of 39.1 MPa. Durability test results indicate a reduction in strength under acid exposure, while an increment in strength is noted under sulfate attack. In addition, all specimens exhibit very low sorptivity values that suggest better resistance to water penetration. The findings offer vital insights into the alternative alkaline activators in manufacturing geopolymer concrete thereby underscoring their potential.