Scholarlink

<p>This study evaluates the structural integrity of gypsum rock, taken from the foundation of the Mosul Dam, under dry and wet conditions by examining the uniaxial compressive strength (UCS) after soaking in tap water (WS<sub>W</sub>) and water saturated with gypsum (WS<sub>G</sub>). Furthermore, it investigates the uniaxial behavior of gypsum rock subjected to freeze-thaw (FT) cycles during the thawing phase under both dry and wet conditions. The results reveal that the presence of secondary crystals alongside the main crystal reduces both UCS and elastic modulus (EM). Moreover, UCS and EM values were higher when exposed to WS<sub>G</sub> compared to WS<sub>W</sub>, and they decreased over time during soaking in both water types. After 21 days, the UCS and EM decreased by 37.8% and 55.3% in the WS<sub>G</sub> state, and by 39.9% and 56.2% in the WS<sub>W</sub> state, respectively compared to the baseline values at 0 days. Additionally, the UCS exhibited a higher value in the dry state during the FT cycle compared to the wet state, while the EM was lower in the dry state compared to the wet state. Notably, both UCS and EM decreased as the number of FT cycles increased in both states. After 21 FT cycles, the UCS and EM decreased by 32% and 27.6% in the wet state and by 12.8% and 29.9% in the dry state, respectively, compared to the baseline values at 0 cycles.</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

Mechanical Behavior of Gypsum Rock Under Environmental Stress

  • 期刊论文

  • 发表日期：

    2025年7月3日

查看全文
  • Mehrdad Ghahremani,
  • Abbas Soroush,
  • Seyed Mohammad Fattahi,
  • Seyed Mohammad Reza Imam,
  • Aram Aziz

摘要

This study evaluates the structural integrity of gypsum rock, taken from the foundation of the Mosul Dam, under dry and wet conditions by examining the uniaxial compressive strength (UCS) after soaking in tap water (WSW) and water saturated with gypsum (WSG). Furthermore, it investigates the uniaxial behavior of gypsum rock subjected to freeze-thaw (FT) cycles during the thawing phase under both dry and wet conditions. The results reveal that the presence of secondary crystals alongside the main crystal reduces both UCS and elastic modulus (EM). Moreover, UCS and EM values were higher when exposed to WSG compared to WSW, and they decreased over time during soaking in both water types. After 21 days, the UCS and EM decreased by 37.8% and 55.3% in the WSG state, and by 39.9% and 56.2% in the WSW state, respectively compared to the baseline values at 0 days. Additionally, the UCS exhibited a higher value in the dry state during the FT cycle compared to the wet state, while the EM was lower in the dry state compared to the wet state. Notably, both UCS and EM decreased as the number of FT cycles increased in both states. After 21 FT cycles, the UCS and EM decreased by 32% and 27.6% in the wet state and by 12.8% and 29.9% in the dry state, respectively, compared to the baseline values at 0 cycles.