Scholarlink

<p>This study investigates the desiccation cracking properties of xanthan gum (XG)-treated clay and its effectiveness in repairing cracked clay by examining their evaporation characteristics, crack propagation, patterns, and the related micro-mechanisms were discussed with the aid of micro examination. Results show that (i) the evaporation rate curve of untreated and XG-treated clay exhibits a Z-shape with three stages, and the latter possesses higher water content, smaller evaporation rate, and longer evaporation durations. (ii) The crack development in both untreated and treated clay follows identical four stages, and the sample treated with higher XG content showed better resistance to wet-dry (W-D) cycles. The <i>R</i><sub>c</sub>, <i>W</i><sub>av</sub> and <i>L</i><sub>to</sub> roughly reduce as XG content increases, and are also impacted by W-D cycles. The optimal XG content was considered as 1.5% and 2%. (iii) The cracked sample repaired by XG exhibited satisfactory crack resistance after the 1st and 2nd W-D cycles, and the <i>R</i><sub>c</sub>, <i>W</i><sub>av</sub> and <i>L</i><sub>to</sub> obviously reduced, and the higher sand content promotes this effect. (iv) XG treatment reduces the clay voids, enhances the elastic connection between inter-particles, and entraps water within XG molecular structures, by its coating, bridging, and filling effects, thus enhancing clay water retention capacity and resistance to desiccation cracking.</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

Desiccation cracking behavior of xanthan gum admixed clay

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年11月18日

查看全文
  • Yuxia Bai,
  • Meihui Cheng,
  • Henglin Xiao,
  • Lihua Li,
  • Qiang Ma,
  • Jun He,
  • Yeping Yang,
  • Yongfeng Deng

摘要

This study investigates the desiccation cracking properties of xanthan gum (XG)-treated clay and its effectiveness in repairing cracked clay by examining their evaporation characteristics, crack propagation, patterns, and the related micro-mechanisms were discussed with the aid of micro examination. Results show that (i) the evaporation rate curve of untreated and XG-treated clay exhibits a Z-shape with three stages, and the latter possesses higher water content, smaller evaporation rate, and longer evaporation durations. (ii) The crack development in both untreated and treated clay follows identical four stages, and the sample treated with higher XG content showed better resistance to wet-dry (W-D) cycles. The Rc, Wav and Lto roughly reduce as XG content increases, and are also impacted by W-D cycles. The optimal XG content was considered as 1.5% and 2%. (iii) The cracked sample repaired by XG exhibited satisfactory crack resistance after the 1st and 2nd W-D cycles, and the Rc, Wav and Lto obviously reduced, and the higher sand content promotes this effect. (iv) XG treatment reduces the clay voids, enhances the elastic connection between inter-particles, and entraps water within XG molecular structures, by its coating, bridging, and filling effects, thus enhancing clay water retention capacity and resistance to desiccation cracking.