Characterization for Water Vapor Sorption and Organic Content of Silane-impregnated Cement-Based Materials

被引：0
|
作者：
Jing W. [1 ]
Yang R. [2 ]
Li K. [1 ]
机构：
[1] Civil Engineering Department, Tsinghua University, Beijing
[2] Chemical Engineering Department, Tsinghua University, Beijing
来源：
Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2020年 / 48卷 / 05期
关键词：
Cement-based materials; Pyrolysis-gas chromatography-mass spectrometry; Silane impregnation; Water vaporsorption/ desorption isotherm;
D O I：
10.14062/j.issn.0454-5648.2020.05.20190486
中图分类号：
学科分类号：
摘要：
Silane impregnation is commonly used as a durability protection measure for concrete. Cement-based materials impregnated with triethoxyisobutylsilane were analyzed by pyrolysis-gas chromatography-mass spectrometry (PGC-MS) to identify the characteristic structure and amount of impregnation. The main component of the pyrolysis fragments is isobutyl. The water vapor sorption isotherm (WVSI) was determined to investigate the interaction between moisture and the impregnated materials. There is no notable difference at a humidity of <30%, the pore condensation (adsorption) and "ink-bottle" effect (desorption) substantially decrease, and the adsorption/desorption rate increases due to the impregnation at a humidity of>60%. The Xenon lamp ageing (10 weeks) after laboratory accelerated ageing process does not change the silane content and the WVSI characteristics. © 2020, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.
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页码：675 / 681
页数：6
相关论文
共 22 条
  • [1] Selander A., Hydrophobic Impregnation of Concrete Structures-Effects on Concrete Properties, (2010)
  • [2] Wang X., Sun H., Shen M., Et al., Hydro-Sci Eng, 5, pp. 96-102, (2016)
  • [3] Moradllo M.K., Sudbrink B., Ley M.T., Determining the effective service life of silane treatments in concrete bridge decks, Constr Build Mater, 116, 30, pp. 121-127, (2016)
  • [4] De Clercq H., De Witte E., Reactivity of silicon based water repellent agents at different application conditions-Part I: reactivity of model compounds, Bauinstandsetzen, 7, 1, pp. 63-78, (2001)
  • [5] Clercqh, Function of Silane Type on its Reactivity for Surface and In-Depth Applications to Different Substrates, 5th International Conference on Water Repellent Treatment of Building Materials, pp. 17-30, (2008)
  • [6] Herb H., Gerdes A., Brenner-Weibeta G., Characterization of silane-based hydrophobic admixtures in concrete using TOF-MS, Cem Concr Res, 70, pp. 77-82, (2015)
  • [7] Medeiros M., Helene P., Efficacy of Surface Hydrophobic Agents in Reducing Water and Chloride Ion Penetration in Concrete, Mater Struct, 41, 1, pp. 59-71, (2008)
  • [8] Jiang Z., Sun Z., Wang P., Chin Harbour En, 1, pp. 26-30, (2005)
  • [9] Chen X., Preparation of TEOS isobutyl triethoxysilane compound emulsion and its effect on the properties of cement based material durability (in Chinese, dissertation), (2016)
  • [10] Zhan H., Wittmann F.H., Zhao T., Relation between the Silicon Resin Profiles in Water Repellent Treated Concrete and the Effectiveness as a Chloride Barrier, Restor Build Monum, 11, 1, pp. 35-46, (2005)
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