Long-term Durability of Cement-based Materials with Very Low w/b

To investigate the durability, especially the long-term stability of cement-based materials with very low w/b, the air permeability test, carbonation test, capillary absorption rate test and dilation potential test were adopted under long-term heat treatment condition. Microstructure of these materi...

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Bibliographic Details
Published in:Journal of Wuhan University of Technology. Materials science edition 2008-06, Vol.23 (3), p.303-308
Main Authors: Xie, Youjun, Liu, Yunhua, Long, Guangcheng
Format: Article
Language:English
Subjects:
Cement
Chemistry and Materials Science
Materials Science
Studies
磁导性
耐久性
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Summary:To investigate the durability, especially the long-term stability of cement-based materials with very low w/b, the air permeability test, carbonation test, capillary absorption rate test and dilation potential test were adopted under long-term heat treatment condition. Microstructure of these materials is also analyzed by scanning electronic microscopy （SEM） and mercury intrusion porosimeter （MIP） in order to further unveil its mechanism and interrelation between microstructure and its properties. The results indicate that in the area investigated, cement-based material with w/b 0.17, like RPC, possesses low porosity and excellent durability. Moreover, its porosity will further decrease under long-term heat treatment compared with normal heat treatment. Its long-term durability is much superior to that of other cement-based materials with w/b 0.25 or 0.35 as high strength concrete（HSC）.
ISSN:1000-2413
1993-0437
DOI:10.1007/s11595-007-3303-7