关于含有不同矿物添加剂的硫氨酸水泥砂的离子结合率的研究
Yuhang Wei1,2,3,4, Zhonglu Cao5,6,7, Jinfang Hou5,6,8
1CCCC Tianjin Port Engineering Institute Co., Ltd, Tianjin, 300222, China. wyh_112062122@163.com.
Scientific reports
|October 16, 2024
概括
硫酸水泥 (SAC) 砂与飞灰和磨砂颗粒高炉渣显示出改善的离子结合,提高了在恶劣环境中混凝土的耐用性. 矿物添加剂显著提高了对化物透的抵抗力.
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.
- 建筑材料 建筑材料
背景情况:
- 沿海和海洋环境中的混凝土结构因离子 (Cl-) 攻击而面临重大耐用性挑战.
- 硫酸水泥 (SAC) 是一个有前途的替代粘合剂,但其在高化物环境中的性能需要优化.
- 了解SAC中的化物结合机制对于提高混凝土的长期耐用性至关重要.
研究的目的:
- 为了研究含有各种矿物添加剂的硫化水泥 (SAC) 砂的离子 (Cl-) 结合率.
- 分析化物度,固化年龄和添加剂类型/含量对SAC砂Cl-结合能力的影响.
- 评估矿物添加剂在提高SAC砂抗化物诱导降解方面的潜力.
主要方法:
- 在不同矿物添加剂的SAC砂中对离子结合的实验研究.
- 分析水溶性化物含量和化物结合比率在固化年龄.
- 使用X射线衍射 (XRD) 描述砂微结构和相位组成.
主要成果:
- 在SAC砂中的结率随着固化年龄的增加而增加,从而减少了内部透率.
- 飞灰 (FA) 和磨砂颗粒高炉渣 (GGBS) 显著提高了Cl结合率 (高达20%FA的46.6%和40%GGBS的38.7%).
- 过度的二氧化烟雾 (SF) 减少了Cl-结合,而适度的石灰石粉 (LP) 改善了它,FA和GGBS促进了C-S-H凝的形成.
结论:
- 矿物添加剂,特别是FA和GGBS,大大提高了SAC砂的化物结合能力和透阻力.
- 这些发现为优化SAC混凝土配方提供了有价值的数据,以提高在富含化物环境中的耐用性.
- 这项研究有助于预测和改进基于SAC的混凝土在现实世界海洋和沿海应用中的性能.
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