A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Influence of micro-cracks on frost resistance of high performance concrete
Effect of drying and wetting cycle on frost resistance of concrete was examined by the CIF test. During drying and wetting curing, micro-cracks developed at matrix-aggregate interface and at matrix, and pore structures of concrete became coarser. Afterwards, water uptake during freeze-thaw cycles increased. High-temperature drying lowered the critical degree of water saturation, and hence frost resistance decreased by the excessive water absorption even in the case of HPC. In the actual outdoor environment, drying and wetting cycles at approx. 50 deg C or higher temperature may occur in the summer, and this may cause degradation of frost resistance. Therefore, an appropriate entrained air is still required for HPC.
Influence of micro-cracks on frost resistance of high performance concrete
Effect of drying and wetting cycle on frost resistance of concrete was examined by the CIF test. During drying and wetting curing, micro-cracks developed at matrix-aggregate interface and at matrix, and pore structures of concrete became coarser. Afterwards, water uptake during freeze-thaw cycles increased. High-temperature drying lowered the critical degree of water saturation, and hence frost resistance decreased by the excessive water absorption even in the case of HPC. In the actual outdoor environment, drying and wetting cycles at approx. 50 deg C or higher temperature may occur in the summer, and this may cause degradation of frost resistance. Therefore, an appropriate entrained air is still required for HPC.
Influence of micro-cracks on frost resistance of high performance concrete
Einfluss von Mikrorissen auf die Frostbeständigkeit von Hochleistungsbeton
Hama, Y. (author) / Aono, Y. (author) / Shibata, S. (author)
2004
10 Seiten, 9 Bilder, 3 Tabellen, 4 Quellen
Conference paper
English
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