在硫酸盐腐蚀下对-尾矿砂混凝土的性能评估
Shuangyang Cai1, Yu Tu1, Xiaoqing Wei2
1School of Traffic and Transportation Engineering, Hunan Institute of Traffic Engineering, Hengyang, 421001, China.
Environmental geochemistry and health
|January 24, 2026
概括
-尾矿砂 (LZTS) 增强了混凝土的性能.
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.
- 环境科学 环境科学
背景情况:
- 在硫酸盐丰富的环境中,混凝土的耐用性是一个关键问题.
- 天然沙子的枯竭需要替代的微型聚合物来源.
- -尾矿砂 (LZTS) 呈现出一个潜在的pozzolanic材料.
研究的目的:
- 为了评估混凝土的硫酸盐耐久性性能,使用-尾矿砂 (LZTS) 作为细聚合物的部分替代品.
- 评估长期对硫酸盐攻击和微观结构变化的耐受性.
- 研究LZTS混凝土的可持续性益处和重金属固定性.
主要方法:
- 混凝土样本中含有不同百分比的LZTS被暴露在5%的硫酸溶液中180天.
- 评估的参数包括质量变化,线性膨胀,表面退化和剩余机械强度.
- 微结构分析采用扫描电子显微镜 (SEM),X射线衍射 (XRD) 和里埃变换红外光谱 (FTIR).
主要成果:
- 优化了LZTS替代水平,使用混合纳米材料,显著改善了硫酸盐耐受性.
- 混凝土保持了令人满意的机械性能,多达50%的天然河沙替代.
- 微结构分析表明矩阵密度和抑制的硫酸盐反应产物.
- 重金属的固定效率超过了90%.
结论:
- 可以有效地使用LZTS作为混凝土中细聚合物的部分替代品,提高硫酸盐的耐用性.
- 这种方法提供了一个可持续的解决方案,通过减少自然资源的枯竭和固定重金属.
- 基于LZTS的混凝土显示出作为一种环保材料的承诺,用于硫酸盐丰富环境中的建筑.
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