Long-term durability of cement-based materials with very low <Emphasis Type="Italic">w/b</Emphasis> |
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Authors: | Youjun Xie Yunhua Liu Guangcheng Long |
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Affiliation: | (1) School of Civil Engineering and Architecture, Central South University, Changsha, 410075, China;(2) Construction Engineering Quality Inspection and Supervise Station, Chenzhou, 42300, China |
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Abstract: | 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).
Funded by the National Natural Science Foundation of China(No.50708114);the Postgraduate Science Foundation of China(No.20060400883) |
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Keywords: | cement-based material durability dilatability potential air permeability carbonation capillary absorption |
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