A model for sorption hysteresis in hardened cement paste
A model for sorption hysteresis in hardened cement paste
复制标题
硬化水泥浆体吸附滞后模型
DOI:
10.1016/j.cemconres.2019.05.005
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发表时间:
2019
影响因子:
11.4
通讯作者:
H.-J. Mögel
中科院分区:
文献类型:
--
作者:
P. Schiller;M. Wahab;T. Bier;H.-J. Mögel
In hardened cement paste (C-S-H gel), water intercalated between the C-S-H layers can be adsorbed and desorbed by varying relative humidity. Sorption in the interlayer space between the C-S-H sheets is supposed to be responsible for low pressure hysteresis of water sorption isotherms. Additionally, large hysteresis loops also appear in diagrams that depict the humidity-dependent volume change of the paste. In contrast to most other porous solids, the volume of the C-S-H gel is larger along the desorption branch (drying) than along the adsorption branch (rewetting). Based on a macroscopic approach, we use a simple model to describe hysteresis in sorption and volume change diagrams. Computed hysteresis loops, which depend on the lateral extension of the interlayer spaces, are similar to loops observed experimentally.
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通讯作者:
H. Mögel