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<p>This research investigated the durability of marginal lateritic soil (MLS) improved with cement (C) and municipal solid waste incineration fly ash (MSWI FA) under sulfate attack, subjected to a number of drying-wetting cycles (NC). The binder (B) consisted of C, MSWI FA, and ground MSWI FA. In this study, B content of 1%, 3%, and 5% by weight of MLS, C:MSWI FA ratios ranging from 100:0 to 70:30, C:ground MSWI FA ratios ranging from 100:0 to 70:30, and water content of 0.8OWC, 1.0OWC, and 1.2OWC (where OWC represented optimum water content) and NC ranging from 1 to 12 cycles were used. The results showed that the maximum 7-day unconfined compressive strength (UCS) of MLS-C-MSWI FA and MLS-C-ground MSWI FA samples occurred at 5% B content, C:MSWI FA ratios of 90:10, and water content of 1.0OWC, which were 1317 and 2528&#xa0;kPa for MSWI FA and ground MSWI FA, respectively. When compared to the Department of Highways standard for subbase material (689&#xa0;kPa), after 12 drying-wetting cycles, the UCS of MLS-C-MSWI FA and MLS-C-ground MSWI FA samples with 3% and 5% B content, water content of 1.0OWC, and C:MSWI FA ratios of 95:5 exceeded the standard value under immersion in water, Na<sub>2</sub>SO solution, and MgSO<sub>4</sub> solution.</p>

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Durability Against Sulfate Attack of Cement and Municipal Solid Waste Incineration Fly Ash Stabilized Marginal Lateritic Soil Under Wet and Dry Cycles

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • Tavorn Kuasakul,
  • Chowarin Chernpimy,
  • Wisitsak Tabyang,
  • Kitsada Krosoongnern,
  • Chokchai Khomobklang,
  • Jaksada Thumrongvut,
  • Nattiya Wonglakorn,
  • Cherdsak Suksiripattanapong

摘要

This research investigated the durability of marginal lateritic soil (MLS) improved with cement (C) and municipal solid waste incineration fly ash (MSWI FA) under sulfate attack, subjected to a number of drying-wetting cycles (NC). The binder (B) consisted of C, MSWI FA, and ground MSWI FA. In this study, B content of 1%, 3%, and 5% by weight of MLS, C:MSWI FA ratios ranging from 100:0 to 70:30, C:ground MSWI FA ratios ranging from 100:0 to 70:30, and water content of 0.8OWC, 1.0OWC, and 1.2OWC (where OWC represented optimum water content) and NC ranging from 1 to 12 cycles were used. The results showed that the maximum 7-day unconfined compressive strength (UCS) of MLS-C-MSWI FA and MLS-C-ground MSWI FA samples occurred at 5% B content, C:MSWI FA ratios of 90:10, and water content of 1.0OWC, which were 1317 and 2528 kPa for MSWI FA and ground MSWI FA, respectively. When compared to the Department of Highways standard for subbase material (689 kPa), after 12 drying-wetting cycles, the UCS of MLS-C-MSWI FA and MLS-C-ground MSWI FA samples with 3% and 5% B content, water content of 1.0OWC, and C:MSWI FA ratios of 95:5 exceeded the standard value under immersion in water, Na2SO solution, and MgSO4 solution.