Abstract
Silica fume (SF) has been used since long as a mineral admixture to improve durability and produce high strength and high performance concrete. Due to the pozzolanic reaction between calcium hydroxide and silica fume, compared with ordinary Portland cement, the carbonation of concrete containing silica fume is much more complex. In this paper, based on a multi-component concept, a numerical model is built which can predict the carbonation of concrete containing silica fume. The proposed model starts with the mix proportions of concrete and considers both Portland cement hydration reaction and pozzolanic reaction. The amount of hydration products which are susceptible to carbonate, such as calcium hydroxide (CH) and calcium silicate hydrate (CSH), as well as porosity can be obtained as associated results of the proposed model during the hydration period. The influence of water-binder ratio and silica fume content on carbonation is considered. The predicted results agree well with experimental results.
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The authors are grateful to the reviewers for their valuable comments.
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Wang, XY., Lee, HS. A model predicting carbonation depth of concrete containing silica fume. Mater Struct 42, 691–704 (2009). https://doi.org/10.1617/s11527-008-9413-7
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DOI: https://doi.org/10.1617/s11527-008-9413-7