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Freeze-thaw durability of concrete: Ice formation process in pores

Cai, H. / Liu, X.

Freeze-thaw durability of concrete is of great importance to hydraulic structures in cold areas. Study of ice formation process in concrete pores is necessary to evaluate the damages in concrete caused by freezing. In this paper, freezing of pore solution in concrete exposed to a freeze-thaw cycle is studied by following the change of concrete electrical conductivity with freezing temperatures. Concretes were subjected to freeze-thaw cycles with temperature varying between -0 degree C and -20 degree C. In the freezing process, the changing rate of concrete electrical conductivity obviously decreases at about -10 degree C, indicating that more pore solution in concrete freezes above -10 degree C than below -10 degree C. According to Powers' static hydraulic pressure hypothesis, it is thought that frost damage mainly occurs between 0 degree C and -100 degree C. To ordinary concrete, frost damages below -10 degree C are negligible.

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Freeze-thaw durability of concrete: Ice formation process in pores

Cai, H. / Liu, X.

Freeze-thaw durability of concrete is of great importance to hydraulic structures in cold areas. Study of ice formation process in concrete pores is necessary to evaluate the damages in concrete caused by freezing. In this paper, freezing of pore solution in concrete exposed to a freeze-thaw cycle is studied by following the change of concrete electrical conductivity with freezing temperatures. Concretes were subjected to freeze-thaw cycles with temperature varying between -0 degree C and -20 degree C. In the freezing process, the changing rate of concrete electrical conductivity obviously decreases at about -10 degree C, indicating that more pore solution in concrete freezes above -10 degree C than below -10 degree C. According to Powers' static hydraulic pressure hypothesis, it is thought that frost damage mainly occurs between 0 degree C and -100 degree C. To ordinary concrete, frost damages below -10 degree C are negligible.

Freeze-thaw durability of concrete: Ice formation process in pores

Cai, H. / Liu, X.

Freeze-thaw durability of concrete is of great importance to hydraulic structures in cold areas. Study of ice formation process in concrete pores is necessary to evaluate the damages in concrete caused by freezing. In this paper, freezing of pore solution in concrete exposed to a freeze-thaw cycle is studied by following the change of concrete electrical conductivity with freezing temperatures. Concretes were subjected to freeze-thaw cycles with temperature varying between -0 degree C and -20 degree C. In the freezing process, the changing rate of concrete electrical conductivity obviously decreases at about -10 degree C, indicating that more pore solution in concrete freezes above -10 degree C than below -10 degree C. According to Powers' static hydraulic pressure hypothesis, it is thought that frost damage mainly occurs between 0 degree C and -100 degree C. To ordinary concrete, frost damages below -10 degree C are negligible.

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Title:

Freeze-thaw durability of concrete: Ice formation process in pores

Contributors:

Cai, H. (author) / Liu, X. (author)

Published in:

Cement and Concrete Research ; 28 ; 1281-1287

Publication date:

1998

Size:

7 Seiten, 7 Quellen

ISSN:

DOI:

https://doi.org/10.1016/S0008-8846(98)00103-3

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

Entfrosten , Gefrieren , Dauerhaftigkeit , Temperatureinfluss , poröser Werkstoff , elektrische Leitfähigkeit , Strukturanalyse , Frosteinwirkung , Frostschaden , Frost-Tauwechsel-Prüfung , Porenlösung , Wasserbauwerk

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