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Abstract <p>The engineering features of problematic soils could be frequently improved by chemical stabilization. Researchers have recently focused on industrial waste/by-product geopolymers as a cement substitute in the concrete making process such as alkali activated. This study explores the potential for enhancing the engineering characteristics of gypseous soil by utilizing calcium carbide residue (CCR), a byproduct of the acetylene production process combined with (LABSA) linear alkyl benzene sulfonic acid to form geopolymer. The geopolymer preparation was accomplished by merging a dilution of LABSA (300 acid/1000 mL distilled water) with a geopolymer (solid to liquid) blending proportion of 80 to 20%) by the whole dry mass of the soil. Mixtures of soil containing 2.5, 5, and 7.5% of the geopolymer mix content were made. The Single oedometer test (SOT) and the double oedometer test (DOT) were carried out in order to ascertain the lowest collapse potential value that correlated with the ideal geopolymer mixing ratio. The adequate geopolymer percentage was found to be 5% since it resulted a reduction in collapse potential by 88.7 and 94.4% for (SOT) and (DOT), respectively in comparison to the natural soil. For stabilizing gypseous soil in engineering projects, a combination of LABSA and CCR can be utilized as a workable, sustainable, and environmentally friendly substitute.</p>

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Effect of Calcium Carbide and Sulfonic Acid Dilution Geopolymer on Collapse Potential of Collapsible Gypseous Soil

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • Rasha F. Abaas,
  • Mohammed Y. Fattah,
  • Maha H. Nsaif

摘要

Abstract

The engineering features of problematic soils could be frequently improved by chemical stabilization. Researchers have recently focused on industrial waste/by-product geopolymers as a cement substitute in the concrete making process such as alkali activated. This study explores the potential for enhancing the engineering characteristics of gypseous soil by utilizing calcium carbide residue (CCR), a byproduct of the acetylene production process combined with (LABSA) linear alkyl benzene sulfonic acid to form geopolymer. The geopolymer preparation was accomplished by merging a dilution of LABSA (300 acid/1000 mL distilled water) with a geopolymer (solid to liquid) blending proportion of 80 to 20%) by the whole dry mass of the soil. Mixtures of soil containing 2.5, 5, and 7.5% of the geopolymer mix content were made. The Single oedometer test (SOT) and the double oedometer test (DOT) were carried out in order to ascertain the lowest collapse potential value that correlated with the ideal geopolymer mixing ratio. The adequate geopolymer percentage was found to be 5% since it resulted a reduction in collapse potential by 88.7 and 94.4% for (SOT) and (DOT), respectively in comparison to the natural soil. For stabilizing gypseous soil in engineering projects, a combination of LABSA and CCR can be utilized as a workable, sustainable, and environmentally friendly substitute.