Scholarlink

<p>Investigating the effects of lithium slag (LS) as an admixtures on the properties of different cement pastes can expand its potential applications in construction materials. This study examines the influence of LS content (0%, 10%, 20%, and 30%) on the performance of ordinary Portland cement (OPC), ultra-fine ordinary Portland cement (UPC), and calcium sulfoaluminate cement (CSC) pastes. The underlying mechanisms are explored using scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier-transform infrared spectroscopy (FTIR). The results indicate that incorporating LS reduces the fluidity, setting time, and bleeding rate of cement pastes but enhances their compressive strength at 1, 7, and 28 days. Specifically, LS improves the long-term strength of OPC pastes, whereas it primarily enhances the early-age strength of UPC pastes. For CSC pastes, LS significantly promotes both early and later-age strength. SEM, XRD, and FTIR analyses reveal that the effects of LS stem from a filling effect and the activation of hydration reactions, where reactive components and gypsum in LS promote the formation of hydration products such as calcium silicate hydrate (C-S-H) and ettringite. These findings provide a theoretical basis for the application of LS in diverse cementitious systems.</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

Effect of lithium slag dosage on macroscopic properties and hydration of cement pastes: a comparative study of OPC, UPC, and CSC systems

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年11月23日

查看全文
  • Xianliang Zhou,
  • Liwei Ma,
  • Xi Zhu,
  • Yantao Zheng,
  • Wei Dai,
  • Yingda Zhang

摘要

Investigating the effects of lithium slag (LS) as an admixtures on the properties of different cement pastes can expand its potential applications in construction materials. This study examines the influence of LS content (0%, 10%, 20%, and 30%) on the performance of ordinary Portland cement (OPC), ultra-fine ordinary Portland cement (UPC), and calcium sulfoaluminate cement (CSC) pastes. The underlying mechanisms are explored using scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier-transform infrared spectroscopy (FTIR). The results indicate that incorporating LS reduces the fluidity, setting time, and bleeding rate of cement pastes but enhances their compressive strength at 1, 7, and 28 days. Specifically, LS improves the long-term strength of OPC pastes, whereas it primarily enhances the early-age strength of UPC pastes. For CSC pastes, LS significantly promotes both early and later-age strength. SEM, XRD, and FTIR analyses reveal that the effects of LS stem from a filling effect and the activation of hydration reactions, where reactive components and gypsum in LS promote the formation of hydration products such as calcium silicate hydrate (C-S-H) and ettringite. These findings provide a theoretical basis for the application of LS in diverse cementitious systems.