Scholarlink

<p>The widespread silty silt soils across the lower Yellow River alluvial plain constrain engineering construction due to insufficient strength. Yet, efficient solidification techniques for subgrade soils in the G220 Dongsheng Line project within this region remain unexplored. To enhance its mechanical properties, this study developed a composite solidifying agent from industrial solid wastes, including fly ash and blast furnace slag. Drawing on domestic and international research on similar soil solidification, regulatory requirements, and the optimum moisture content of silty silt (14.9%), the influencing factors and boundary conditions were determined. A systematic investigation was conducted on the solidifying agent dosage (4–16%), moisture content (12–18%), compaction degree (90–98%), curing age (3d, 7d, 28d, 56d, and 90d), and sodium sulfate content (0%, 5%, 10%, and 15%) on unconfined compressive strength (UCS). Experimental results indicate that the UCS peaks at 2.18 MPa when the curing agent content is 12%, the moisture content is 14.9%, the compaction degree is 98%, and the gypsum content is 5%. UCS gradually increases with extended curing duration. This study enhances the mechanical properties of subgrade soil for the G220 Dongsheng Line project and achieves the reuse of industrial solid waste.</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

Unconfined Compressive Strength Optimization of Industrial Solid Waste-Based Soil Stabilizers

  • 期刊论文

  • 发表日期：

    2025年11月1日

查看全文
  • Y. Z. Wang,
  • F. Y. Chen,
  • Y. Gao,
  • M. L. Zhuang,
  • F. H. Ge,
  • Z. J. Tang

摘要

The widespread silty silt soils across the lower Yellow River alluvial plain constrain engineering construction due to insufficient strength. Yet, efficient solidification techniques for subgrade soils in the G220 Dongsheng Line project within this region remain unexplored. To enhance its mechanical properties, this study developed a composite solidifying agent from industrial solid wastes, including fly ash and blast furnace slag. Drawing on domestic and international research on similar soil solidification, regulatory requirements, and the optimum moisture content of silty silt (14.9%), the influencing factors and boundary conditions were determined. A systematic investigation was conducted on the solidifying agent dosage (4–16%), moisture content (12–18%), compaction degree (90–98%), curing age (3d, 7d, 28d, 56d, and 90d), and sodium sulfate content (0%, 5%, 10%, and 15%) on unconfined compressive strength (UCS). Experimental results indicate that the UCS peaks at 2.18 MPa when the curing agent content is 12%, the moisture content is 14.9%, the compaction degree is 98%, and the gypsum content is 5%. UCS gradually increases with extended curing duration. This study enhances the mechanical properties of subgrade soil for the G220 Dongsheng Line project and achieves the reuse of industrial solid waste.