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<p>The increasing consumption of coal has significantly raised the production of fly ash (FA), leading to environmental disposal challenges. This study investigates the potential of stabilizing FA mixed with the biopolymer (BP) xanthan gum (XG), enhance its performance as a construction or geo-material. FA, derived from thermal power plants, poses environmental risks when disposed of improperly, but its advantageous properties make it a valuable resource. The study examines the effectiveness of XG in enhancing the strength and stability of FA. Various concentrations of XG (0.5% to 2.0%) were mixed with FA, and the samples were tested for unconfined compressive strength (UCS) test and small strain shear modulus (<i>G</i><sub><i>max</i></sub>) using bender element (BE) apparatus. The findings show that XG improves both the strength and maximum shear modulus (stiffness) of untreated FA, with optimal performance observed at 1.5% XG. Despite higher costs and concerns about biodegradability and mixing methods, the research emphasizes the potential of BP stabilized FA can be sustainable alternative in construction. The findings indicate a strong correlation between UCS values and <i>G</i><sub><i>max</i></sub>, enabling the prediction of the composite’s strength behaviour.</p>

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Effect of biopolymer stabilization on fly ash: correlating unconfined compressive strength with small strain shear modulus

  • 期刊论文

  • 发表日期：

    2026年5月13日

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  • Parul Rawat,
  • Amit Kumar Ram,
  • Supriya Mohanty

摘要

The increasing consumption of coal has significantly raised the production of fly ash (FA), leading to environmental disposal challenges. This study investigates the potential of stabilizing FA mixed with the biopolymer (BP) xanthan gum (XG), enhance its performance as a construction or geo-material. FA, derived from thermal power plants, poses environmental risks when disposed of improperly, but its advantageous properties make it a valuable resource. The study examines the effectiveness of XG in enhancing the strength and stability of FA. Various concentrations of XG (0.5% to 2.0%) were mixed with FA, and the samples were tested for unconfined compressive strength (UCS) test and small strain shear modulus (Gmax) using bender element (BE) apparatus. The findings show that XG improves both the strength and maximum shear modulus (stiffness) of untreated FA, with optimal performance observed at 1.5% XG. Despite higher costs and concerns about biodegradability and mixing methods, the research emphasizes the potential of BP stabilized FA can be sustainable alternative in construction. The findings indicate a strong correlation between UCS values and Gmax, enabling the prediction of the composite’s strength behaviour.