Scholarlink

<p>Stone cultural heritage suffers from significant degradation due to long-term environmental exposure, necessitating repair materials that exhibit high workability, compatibility, and durability. In this study, a natural hydraulic lime (NHL5)-based composite mortar modified with nano-metakaolin (NMK) was developed. The workability, compatibility, and durability of the composite mortar were systematically evaluated through multiple characterization techniques, with the enhancement mechanism elucidated from a microscale perspective. Results show that the proposed material exhibits shortened setting times, high early strength, adjustable final strength, low shrinkage, and reduced soluble salt content. Moreover, it demonstrates excellent resistance to erosion, maintaining its structural integrity and mechanical performance even after dry-wet or freeze-thaw cycles. Microstructural analysis revealed that the incorporation of NMK enhances pozzolanic reactivity, leading to the formation of additional hydration products and a denser matrix. Notably, a successful application at Yungang Grottoes confirms its potential as an effective strategy for the conservation of stone heritage.</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

Performance evaluation and application of nano-metakaolin modified natural hydraulic lime for stone cultural heritage restoration

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年10月8日

查看全文
  • Yufu Ji,
  • Zirui Zhu,
  • Haitao Yan,
  • Jinhua Wang,
  • Qingping Yang,
  • Qingwen Ma,
  • Hongbin Zhang

摘要

Stone cultural heritage suffers from significant degradation due to long-term environmental exposure, necessitating repair materials that exhibit high workability, compatibility, and durability. In this study, a natural hydraulic lime (NHL5)-based composite mortar modified with nano-metakaolin (NMK) was developed. The workability, compatibility, and durability of the composite mortar were systematically evaluated through multiple characterization techniques, with the enhancement mechanism elucidated from a microscale perspective. Results show that the proposed material exhibits shortened setting times, high early strength, adjustable final strength, low shrinkage, and reduced soluble salt content. Moreover, it demonstrates excellent resistance to erosion, maintaining its structural integrity and mechanical performance even after dry-wet or freeze-thaw cycles. Microstructural analysis revealed that the incorporation of NMK enhances pozzolanic reactivity, leading to the formation of additional hydration products and a denser matrix. Notably, a successful application at Yungang Grottoes confirms its potential as an effective strategy for the conservation of stone heritage.