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A platform for research: civil engineering, architecture and urbanism
Influence of water uptake during freezing and thawing
The frost resistance of concrete is guaranteed when a sufficient air void system is available. Practical experiences show that in Central Europe concretes without air entrainment can also have a high durability and serviceability. This practical experiences are confirmed by testing frost resistance with CF test. The frost resistance essentially depends on the degree of saturation and porosity. During the first freeze thaw cycles the water absorption increases until a critical degree of saturation is reached. If this critical value is surpassed the water uptake decreases and the internal damage increases. The investigations of water absorption during freeze thaw test confirms that reduction of capillary pore and coarse pore volume can increase the frost resistance. In case of no application of air entrainment in concrete the performance concept is necessary to test the frost resistance.
Influence of water uptake during freezing and thawing
The frost resistance of concrete is guaranteed when a sufficient air void system is available. Practical experiences show that in Central Europe concretes without air entrainment can also have a high durability and serviceability. This practical experiences are confirmed by testing frost resistance with CF test. The frost resistance essentially depends on the degree of saturation and porosity. During the first freeze thaw cycles the water absorption increases until a critical degree of saturation is reached. If this critical value is surpassed the water uptake decreases and the internal damage increases. The investigations of water absorption during freeze thaw test confirms that reduction of capillary pore and coarse pore volume can increase the frost resistance. In case of no application of air entrainment in concrete the performance concept is necessary to test the frost resistance.
Influence of water uptake during freezing and thawing
Auberg, R. (author) / Setzer, M.J. (author)
1997
14 Seiten, 10 Bilder, 4 Tabellen, 13 Quellen
Conference paper
English
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