Carbonation cracking of reinforced AAC panel
1
Sumitomo Metal Mining Siporex Co., Ltd, Research and Development Center, Japan
Publication date: 2011-12-01
Cement Wapno Beton (Special 2011 16) 81-85 (2011)
KEYWORDS
ABSTRACT
Carbonation cracking and its mechanism of AAC have not been reported at all. One of the possible mechanisms of carbonation cracking caused by carbonation shrinkage is investigated. Carbonation shrinkage at the occurrence of cracking was approximately 0.12% both for fi eld study and accelerated carbonation, while carbonation degree was approximately 50% and 35%, respectively. Tensile stress in AAC was calculated to reach tensile strain capacity (0.04–0.05%) at the occurrence of cracking both for fi eld study and accelerated carbonation data. In other words, the proposed mechanism of carbonation cracking was certified.
REFERENCES (5)
1.
Matsushita, F. and Shibata, S., 2000, Carbonation Degree as Durability Criteria for Autoclaved Aerated Concrete, 5th CANMET/ACI International Conference on Durability of Concrete, pp. 1123-1134.
2.
Matsushita, F., Aono, Y. and Shibata, S., 2004, Microstructure Change of Autoclaved Aerated Concrete during Carbonation under Working and Accelerated Conditions, Journal of Advanced Concrete Technology, 2, pp. 121-129.
3.
Matsushita, F., Aono, Y. and Shibata, S., 2005, Carbonation Shrinkage of Autoclaved Aerated Concrete, 4th International Conference on Autoclaved Aerated Concrete, Innovation and Development, London, pp. 195-202.
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Koponen, A. and Nieminen, J., 1992, Initial Steel Stresses in Reinforced AAC Units, in Advances in Autoclaved Aerated Concrete, Edited by F. H. Wittmann, pp. 187-194, Balkema.
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Matsushita, F., Aono, Y. and Shibata, S., 2000, Carbonation Degree of Autoclaved Aerated Concrete, Cement and Concrete Research, 30, pp. 1741 1745.
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