关于由海水制备的水泥-酸盐土的性能进化定律和微观机制的研究
Dengfeng Wang1,2, Zhen Li2,3, Yujie Qi1,2
1State Key Laboratory of Precision Blasting, Hohai University, Nanjing 210024, China.
Materials (Basel, Switzerland)
|March 14, 2026
概括
海水可以取代水下道的水泥酸盐 (CSG) 中的淡水. 虽然它最初影响了A组件的特性,但它显著提高了长期的CSG强度,使其成为海洋工程的可行选择.
科学领域:
- 土木工程 土木工程是指土木工程.
- 材料科学 材料科学 材料科学
- 地质技术工程 地质技术工程
背景情况:
- 水下盾牌道的建造依赖于水泥酸盐 (CSG).
- 在CSG制备过程中用海水代替淡水是关键的工程问题.
- CSG包括A组件 (岩,水泥,水) 和B组件 (酸盐溶液).
研究的目的:
- 在CSG制剂中使用海水 (Sw) 而不是淡水 (Fw) 的效果.
- 分析Sw对CSG特性的影响,如出血,设置时间和压力强度.
- 探索Sw对CSG绩效影响的潜在机制.
主要方法:
- 在CSG中,不同比例的Sw替代Fw.
- 测试的属性包括出血率,初始/最终设置时间,凝时间和压力强度.
- 分析了微观特征,以了解冲击机制.
主要成果:
- 使用Sw扩展丁石导致超过50%的出血率,超过10%的工程限制.
- 然而,当本托尼特被Fw (出血<10%) 扩充时,Sw替代并没有显著影响A组件.
- 随着Sw比率的增加,CSG设置时间缩短;一天强度略有下降,但28天强度在45%的Sw替换下增加了高达52%.
- Sw中的离子对C3S和C2S的水解产生了积极的影响,超过了硫酸盐离子的负面影响.
结论:
- 海水可用于准备CSG用于水下盾道,特别是当丁石用淡水扩大时.
- 增加的海水含量显著提高了CSG的后期压力强度.
- 该研究为利用海水在海上道施工泥应用中提供了宝贵的指导.
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