NDLI: Influence of the application method of release agents on thickness of mould oils

Content Provider	Springer Nature Link
Author	Djelal, C. Vanhove, Y. Chambellan, D. Brisset, P.
Copyright Year	2009
Abstract	The parameters likely to influence the appearance of the concrete facings are in particular the casting process of the concrete in the formwork, characteristics of the wall and the nature of the release agent. This study looks at the influence of the thickness of vegetable or mineral-based oils on the aesthetic quality of facings. The thickness of the oil films has been measured with a variant of the PIXE method specially developed for this study. Moreover, to create the conditions of a concrete poured into a formwork, a tribometer for fluid material developed in our laboratory was used. With the help of these devices, the thickness of the oil film before and after the pouring of a concrete in a metallic mould was studied. The vegetable oil film has a good resistance with the concrete friction and a film from 1 to 2 μm is enough to obtain a high quality facing.Les paramètres pouvant influencer l’apparence des parements en béton sont en particulier le mode de mise en œuvre du béton dans le coffrage, les caractéristiques des parois et la nature de huile de démoulage. Cette étude s’intéresse à l’influence de l’épaisseur des huiles à base végétale ou minérale sur l’esthétique des parements. L’épaisseur des films d’huile a été mesurée avec une variante de la méthode PIXE spécialement développée pour cette étude. De plus, afin de créer les conditions d’un béton déversé dans un coffrage, un tribomètre pour les matériaux fluides développé dans notre laboratoire a été utilisé. A l’aide de ces appareils, l’épaisseur de l’huile de démoulage avant et après le déversement du béton dans un moule métallique a été étudiée. Le film d’huile végétale a une bonne résistance au frottement du béton et un film de 1 à 2 μm est suffisant pour obtenir un parement de grande qualité.
Starting Page	687
Ending Page	698
Page Count	12
File Format	PDF
ISSN	13595997
Journal	Materials and Structures
Volume Number	43
Issue Number	5
e-ISSN	18716873
Language	English
Publisher	Springer Netherlands
Publisher Date	2009-07-31
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Release agent Concrete Aesthetic quality PIXE method Dusting Dirtying Micro-bubbling Attachment point Building Materials Civil Engineering Operating Procedures, Materials Treatment Theoretical and Applied Mechanics Materials Science Structural Mechanics
Content Type	Text
Resource Type	Article
Subject	Building and Construction Mechanics of Materials Materials Science Civil and Structural Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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