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A platform for research: civil engineering, architecture and urbanism
Delayed ettringite formation in Swedish concrete railroad ties
A petrographic examination of cracked Swedish concrete railroad ties identified delayed ettringite formation (DEF) as the damaging mechanism. This was unexpected because the concrete railroad ties were steam-cured with a maximum concrete temperature below 60 degree C. The consensus in the published literature is that DEF only occurs in concrete subjected to heat curing above 70 degree C. However, DEF is not only influenced by the curing temperature, but also by various other factors, such as cement composition (alkalis, C3S, C3A, SO3, and MgO), fineness, etc. If an unfavorable combination of these parameters exists, delayed ettringite may occur at lower temperatures than 70 degree C. In this paper, the influence of various parameters on DEF is discussed with reference to the investigated concrete.
Delayed ettringite formation in Swedish concrete railroad ties
A petrographic examination of cracked Swedish concrete railroad ties identified delayed ettringite formation (DEF) as the damaging mechanism. This was unexpected because the concrete railroad ties were steam-cured with a maximum concrete temperature below 60 degree C. The consensus in the published literature is that DEF only occurs in concrete subjected to heat curing above 70 degree C. However, DEF is not only influenced by the curing temperature, but also by various other factors, such as cement composition (alkalis, C3S, C3A, SO3, and MgO), fineness, etc. If an unfavorable combination of these parameters exists, delayed ettringite may occur at lower temperatures than 70 degree C. In this paper, the influence of various parameters on DEF is discussed with reference to the investigated concrete.
Delayed ettringite formation in Swedish concrete railroad ties
Sahu, Sadananda (author) / Thaulow, Niels (author)
Cement and Concrete Research ; 34 ; 1675-1681
2004
7 Seiten, 30 Quellen
Article (Journal)
English
Delayed ettringite formation in Swedish concrete railroad ties
| Elsevier | 2004
Delayed ettringite formation in Swedish concrete railroad ties
| British Library Online Contents | 2004
Delayed ettringite formation in Swedish concrete railroad ties
| Online Contents | 2004
Delayed Ettringite Formation in Concrete
| British Library Conference Proceedings | 1999
| Online Contents | 2001