Abstract
Within an European Union funded research project, a series of standard tests was devised in order to evaluate the technical performance of release agents in general and vegetable oil based ones in particular. In this paper, these tests are described in some detail.
They are divided in two main fields of investigation: interaction of the release agents with the concrete surfaces directly in contact with them; interaction of the release agents with the moulds. Such aspects as the adherence concrete-mould, corrosion effects in steel moulds, the effects of vibration and heating, the number of re-utilisations without cleaning the moulds and the efficiency period, have been addressed in this research program.
Résumé
Un programme de recherche, financé par l’Union Européenne, a été mis en place concernant le comportement des huiles de coffrage, notamment sur les huiles à base végétale. Cet article présent les essais standards qui ont été développés pour obtenir les caractéristiques techniques des huiles en prenant en compte leur interaction avec le béton et avec les coffrages. Ce programme de recherche a également exploré les problèmes éventuels tels que l’adhérence béton-coffrage, la corrosion des coffrages métalliques, les effets de chauffage et de vibration, le nombre de ré-emplois des coffrages ainsi que la période d’utilisation, ces aspects sont présentés dans le présent article.
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References
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‘Recommandations professionnelles relatives à l’utilisation des démoulants’,Annales de l’Institut Technique du Bâtiment et des Travaux Publics 354 (1977) Série: Matériaux no 52.
Solacolu, C., ‘Comparative analysis of the use of “ecological” release agents’ (only available in German), Philipp Holzman B 10-1864, Neu-Isenburg, 1994.
de Brito, J., Branco, F. A. and dos Santos, R., ‘Do new release agents work’,Concrete International 21 (5) (1999) (American Concrete Institute).
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de Brito, J., dos Santos, R. & Branco, F.A. Evaluation of the technical performance of concrete vegetable oil based release agents. Mat. Struct. 33, 262–269 (2000). https://doi.org/10.1007/BF02479336
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DOI: https://doi.org/10.1007/BF02479336