关于基于甲高的地质聚合物砂的化物 - 硫酸盐电阻的研究
Jiangbo Cheng1, Yongjun Qin1, Ziqi Yao1
1College of Civil Engineering and Architecture, Xinjiang University, Urumqi 830047, China.
Materials (Basel, Switzerland)
|October 26, 2024
概括
这项研究检查了在化硫酸盐环境中的混凝土耐用性,使用具有不同颗粒高炉渣 (GBFS) 含量的甲甲地质聚合物砂. 较高的GBFS含量最初增加了强度,但降低了长期侵蚀性,而半沉浸会造成更多的损伤.
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.
- 腐蚀科学 腐蚀科学
背景情况:
- 硫酸盐腐蚀对混凝土基础设施构成重大威胁.
- 基于甲的地质聚合物砂 (MGP) 为普通波特兰水泥 (OPC) 提供了潜在的替代品.
- 颗粒高炉渣 (GBFS) 经常被纳入水泥材料中以修改性能.
研究的目的:
- 调查不同颗粒高炉渣 (GBFS) 剂量对化硫酸盐攻击下的基于甲的地质聚合物砂 (MGP) 耐用性的影响.
- 为了评估完全与半沉浸模式对混凝土降解的影响.
- 为了比较MGP与普通波特兰水泥 (OPC) 砂的性能.
主要方法:
- 用GBFS剂量 (10-50%) 的MGP标本在完全和半沉浸的化硫酸盐环境中进行了120天的试验.
- 分析包括表面形态,质量变化,机械性能变化,X射线衍射 (XRD) 和扫描电子显微镜 (SEM).
主要成果:
- 增加GBFS剂量增加了MGP的初始强度和密度.
- 然而,更高的GBFS剂量与120天后的侵蚀抵抗有负相关性,导致更严重的损伤.
- 与完全浸泡相比,半浸泡条件在浸泡-蒸发接口区域造成了更大的恶化.
- 与OPC砂相比,使用40%和50%的GBFS (M40,M50) 的MGP表现出优越的强度和耐腐蚀性.
结论:
- 虽然GBFS提高了初始性能,但过量可能会在化硫酸盐环境中损害长期耐用性.
- 由于"效应"和离子度差异,半浸水带来了更大的风险.
- 具有优化的GBFS含量 (例如M40,M50) 的甲烯基基地质聚合物砂在高度腐蚀的环境中显示出使用的希望.
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