碳酸或碳酸对硫氨酸的影响 酸水合剂 水合
Pilar Padilla-Encinas1, Ana Fernández-Jiménez1
1Eduardo Torroja Institute for Construction Science, National Research Council (iETcc-CSIC), 28033 Madrid, Spain.
Molecules (Basel, Switzerland)
|July 12, 2025
概括
碳酸增强了硫硫氨酸的结石强度,而碳酸阻碍了水合并降低了机械强度,导致材料降解和花.
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.
- 地质化学 地质化学
背景情况:
- 硫氨酸 (CSA) 是现代水泥材料的关键组成部分.
- 了解添加剂对CSA水分的作用对于优化性能至关重要.
- 碳酸和碳酸是常见的添加剂,具有不同的影响.
研究的目的:
- 调查碳酸 (CaCO3) 和碳酸 (Na2CO3) 对商业CSA (KCSA) 的水化和机械性能的影响.
- 描述水合动力学,并确定在不同添加剂度 (5%和20%) 下产生的水合产品.
主要方法:
- 制备含有不同CaCO3和Na2CO3含量的水化KCSA面料.
- 确定机械压力强度和水合率.
- 使用X射线衍射 (XRD),差异热分析/热重力测量分析 (DTA/TG),里埃变形红外光谱 (FTIR) 和扫描电子显微镜 (SEM) 进行水化产品的表征.
主要成果:
- 加入CaCO3对KCSA的机械强度产生了有益影响,特别是在90天后,对水化动力学和乙石和AH3形成的影响最小.
- Na2CO3表现出一种有害的影响,减缓了水合动力学和减少了早期的机械强度.
- 高Na2CO3含量 (20%) 促进了氧化, gaylusite 和 thenardite 的形成,它们是转移稳定的和分解的,导致花朵,微裂和显著的强度损失.
结论:
- CaCO3可以成为增强CSA结合剂长期机械性能的一种有益的添加剂.
- Na2CO3对CSA水合和强度的发展产生负面影响,导致材料不稳定和降解.
- 该研究强调了添加剂化学在确定基于硫硫氨酸的材料的性能和耐用性方面的关键作用.
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