Abstract
A slipform rig is designed in order to simulate realistic loads that the concrete is exposed for during slipforming. The slipform consist of a slipform panel where the inclination and stiffness can vary in order to simulate all kinds of slipforms. It is primarily the normal pressure, pore water pressure, concrete temperature and the lifting force (friction) that are measured during a test. By using this rig, it is possible to identify the parameters that affect the friction force that occur when the slipform panel is lifted. With more knowledge on parameters affecting the friction, it is possible to select a concrete mix design and slipform technique that will result in a lower friction force. It is assumed that lower friction force will decrease the risk for any surface damages.
Résumé
Un coffrage glissant est équipé de façon à simuler les charges réelles auxquelles le béton est soumis pendant sa mise en place dans le coffrage glissant. Le coffrage glissant consiste en un panneau de coffrage glissant où l'inclinaison et la rigidité peuvent varier pour simuler tous les genres de coffrages glissants. C'est à l'origine la pression normale, la pression interstitielle de l'eau, la température du béton et la force de levage (friction) qui sont mesurées pendant un essai. En utilisant cet équipement, il est possible d'identifier les paramètres qui affectent la force de friction créée quand le panneau du coffrage glissant est soulevé. Avec plus de connaissance sur ces paramètres affectant la friction, il est possible de sélectionner une conception du mélange de béton et une technique de coffrage glissant qui conduiront à une force de friction moindre. Il est supposé qu'une force de friction plus petite diminuera le risque de dégâts de surface.
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References
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Editorial Note Mr. Magne Maage is a RILEM Senior Member. He participates in the work of RILEM TC ECM ‘Environment-conscious construction materials and systems’.
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Foss⇘, K.T., Maage, M. Measurement of friction forces that occur during slipforming in a slipform rig. Mat. Struct. 36, 319–322 (2003). https://doi.org/10.1007/BF02480871
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DOI: https://doi.org/10.1007/BF02480871