Application of thermodynamic modelling to hydrated cements
Application of thermodynamic modelling to hydrated cements
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DOI：
10.1016/j.cemconres.2019.105779
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发表时间：
2019-09-01
影响因子：
11.4
通讯作者：
Zajac, Maciej
中科院分区：
文献类型：
--
作者：
Lothenbach, Barbara;Zajac, Maciej
热力学建模对于了解粘合剂成分对现代波特兰复合水泥中水合物组合的影响及其对耐久性的影响至关重要。水合物体积的二元和三元图可以可视化不同 SCM 在不同水合时间的效果。孔隙溶液数据分析和推导的饱和指数可用于进一步了解控制水合物溶解和沉淀的过程。对暴露于不同环境的水化水泥的建模对于理解硫酸盐、氯化物和碳酸盐侵蚀的决定因素做出了重大贡献。热力学模型和建模方法已经达到了成熟的水平。在过去的几年中，更多的热力学数据变得可用，使得热力学计算更加可靠。确定的主要差距包括描述 C-S-H 吸收离子和水的模型的完善，以及 ASR 产品和沸石的数据。
Thermodynamic modelling is essential to understand the effect of binder composition on hydrate assemblage in modern Portland composite cements and its effect on durability. Binary and ternary plots of the hydrates' volumes can visualize the effect of different SCMs at different hydration times. The pore solution data analysis and the derived saturation indices can be used to gain further insights into the processes governing the dissolution and precipitation of hydrates. The modelling of the hydrated cements exposed to different environments has contributed significantly to the understanding of the determining factors governing sulfate, chloride and carbonate attack.Thermodynamics models and modelling approaches have achieved a mature level. In the last years, more thermodynamic data have become available making thermodynamic calculations more reliable. The main gaps identified include the refinement of models describing the uptake of ions and water by C-S-H, as well as data for ASR products and zeolites.