用metakaolin增强液压石灰砂:关于改善历史建筑的修复材料的研究
Xiaolong Wang1, Huaishuai Shang1, Junhao Zhou1
1School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China.
Materials (Basel, Switzerland)
|July 27, 2024
概括
将金属 (MK) 添加到液压石灰砂 (HLM) 中,可以显著改善其机械性能,使其成为历史建筑恢复的理想选择. 最佳的混合物增强强度和耐用性,同时保持有效康复的可操作性.
科学领域:
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
- 保护科学 保护科学
背景情况:
- 液压石灰砂 (HLM) 对于历史建筑的修复至关重要.
- 提高HLM属性对于长期的结构完整性和保存至关重要.
- 甲基 (MK) 被探索为一个pozzolanic添加剂,以提高HLM的性能.
研究的目的:
- 调查不同甲 (MK) 含量对液压石灰砂 (HLM) 性能的影响.
- 为了确定历史建筑恢复应用的最佳MK混合物.
- 评估MK添加引起的微观结构变化和反应机制.
主要方法:
- 对历史建筑砂样本的分析.
- 用不同的MK百分比制备HLM.
- 测试物理和机械性能 (流动性,定位时间,强度,密度,吸水能力,蒸汽传导,弹性模量).
- 使用X射线衍射 (XRD) 和扫描电子显微镜 (SEM) 的微结构分析.
主要成果:
- 增加的MK含量减少了流动性,但改善了水消耗和缩短了设置时间.
- 压力强度 (高达98.1%),屈曲强度 (高达55.1%) 和粘合强度 (26.9%) 的显著提高.
- 提高了密度,降低了水分含量和吸水能力,降低了水蒸气传递率,增加了弹性模量 (2.19 GPa 到 7.88 GPa).
结论:
- 甲可林有效地增强了液压石灰砂的物理和机械性能.
- 最佳的9.0%MK和25.0%重碳酸混合物提供了强度,耐久性,透性和可加工性的平衡.
- 这种优化的HLM非常适合用于历史建筑的修复和恢复,改善裂耐用性和寿命.
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