Scholarlink

<p>Sand-bentonite (SB) and sand-bentonite-cement (SBC) mixtures are widely used in geotechnical applications such as liners, cut-off walls and soil stabilization. This study investigates the strength and moisture retention behavior of SB and SBC mixtures at different curing periods (7, 14, and 28 days). A total of six mix ratios were tested, with three from each group (SB and SBC). The best-performing mix was identified from each group based on compressive strength, cost evaluation, and compaction characteristics. The optimal SBC mix (5% cement) achieved a 28-day strength of 3464.30&#xa0;kPa, which is approximately 7.5 times greater than that of the optimal SB mix (462.93&#xa0;kPa). Future strength development was predicted using best-fit equations generated in MS Excel and implemented in Python to estimate hydration times (t₅₀ and t₉₀). Water Retention Curves (WRCs) were developed using the filter paper method and fitted with the van Genuchten equation. The SBC mix exhibited a higher ‘α’ value (0.0009&#xa0;kPa⁻¹ vs. 0.0007&#xa0;kPa⁻¹), indicating it holds water longer before drying, while the SB mix had a higher ‘n’ value (1.60 vs. 1.425), suggesting it releases water more quickly. The results show that cement not only enhances long-term strength but also changes the moisture retention pattern due to C-S-H gel formation. In sum, engineers utilize SB when moderate strength and impermeability are required and emphasize SBC over SB when additional strength for a longer duration and faster stabilization play a vital role.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Strength Development and Hydration Behavior Analysis of Sand-Bentonite and Sand-Bentonite-Cement Composites

  • 期刊论文

  • 发表日期：

    2026年5月28日

查看全文
  • Md. Akhtar Hossain,
  • Soumyadip Maitra,
  • Zakiul Karim Utsha

摘要

Sand-bentonite (SB) and sand-bentonite-cement (SBC) mixtures are widely used in geotechnical applications such as liners, cut-off walls and soil stabilization. This study investigates the strength and moisture retention behavior of SB and SBC mixtures at different curing periods (7, 14, and 28 days). A total of six mix ratios were tested, with three from each group (SB and SBC). The best-performing mix was identified from each group based on compressive strength, cost evaluation, and compaction characteristics. The optimal SBC mix (5% cement) achieved a 28-day strength of 3464.30 kPa, which is approximately 7.5 times greater than that of the optimal SB mix (462.93 kPa). Future strength development was predicted using best-fit equations generated in MS Excel and implemented in Python to estimate hydration times (t₅₀ and t₉₀). Water Retention Curves (WRCs) were developed using the filter paper method and fitted with the van Genuchten equation. The SBC mix exhibited a higher ‘α’ value (0.0009 kPa⁻¹ vs. 0.0007 kPa⁻¹), indicating it holds water longer before drying, while the SB mix had a higher ‘n’ value (1.60 vs. 1.425), suggesting it releases water more quickly. The results show that cement not only enhances long-term strength but also changes the moisture retention pattern due to C-S-H gel formation. In sum, engineers utilize SB when moderate strength and impermeability are required and emphasize SBC over SB when additional strength for a longer duration and faster stabilization play a vital role.