Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Roving reinforced integral formwork for construction rationalization
Thin panels made out of concrete with small aggregates and reinforced with glass fibre rovings are being used as integral formwork. The tests which were necessary for receiving a technical approval are described. They include loading tests on the panels and on the panel-site concrete composite, accelerated tests on the glass rovings and fire tests. The size of panels was chosen such that they follow the standard size of panels which are being used on small and medium size construction sites, such as for family houses, apartment buildings, school buildings etc. This means that there is a large market for formwork panels with a size of 1.00 m x 0.50 m. Bond between the formwork panel and the concrete poured on top of it is crucial for the composite action of the cross-section. Because adhesion between the two materials seemed not reliable enough five dovetail grooves were provided which were in the longitudinal direction. For reinforcing alkali resistant glass is used. The rovings were tested in order to check the alkali resistance in concrete. The idea of an integrated formwork has been realised by panels made of fine grain concrete and reinforced with glass fibre rovings. Extensive testing of prototype panels with respect to bending strength, accelerated ageing, composite action together with cast-inplace concrete, and fire resistance has led to considerable improvements of the design of the panels. The use of these panels will cut construction cost and will speed up the construction process. In the final design the cross-section shows a dovetail groove depth of 5 mm, the ribs between the grooves, the chamfered edge, the glass fibre rovings have a distance of 20 mm. The concrete has a maximum grain size of 8 mm and a water-cement ratio equal to 0.42. The glass roving consists of AR glass, alternatively from NEG, Japan, or CEMFIL, Spain.
Roving reinforced integral formwork for construction rationalization
Thin panels made out of concrete with small aggregates and reinforced with glass fibre rovings are being used as integral formwork. The tests which were necessary for receiving a technical approval are described. They include loading tests on the panels and on the panel-site concrete composite, accelerated tests on the glass rovings and fire tests. The size of panels was chosen such that they follow the standard size of panels which are being used on small and medium size construction sites, such as for family houses, apartment buildings, school buildings etc. This means that there is a large market for formwork panels with a size of 1.00 m x 0.50 m. Bond between the formwork panel and the concrete poured on top of it is crucial for the composite action of the cross-section. Because adhesion between the two materials seemed not reliable enough five dovetail grooves were provided which were in the longitudinal direction. For reinforcing alkali resistant glass is used. The rovings were tested in order to check the alkali resistance in concrete. The idea of an integrated formwork has been realised by panels made of fine grain concrete and reinforced with glass fibre rovings. Extensive testing of prototype panels with respect to bending strength, accelerated ageing, composite action together with cast-inplace concrete, and fire resistance has led to considerable improvements of the design of the panels. The use of these panels will cut construction cost and will speed up the construction process. In the final design the cross-section shows a dovetail groove depth of 5 mm, the ribs between the grooves, the chamfered edge, the glass fibre rovings have a distance of 20 mm. The concrete has a maximum grain size of 8 mm and a water-cement ratio equal to 0.42. The glass roving consists of AR glass, alternatively from NEG, Japan, or CEMFIL, Spain.
Roving reinforced integral formwork for construction rationalization
Integrierte Schaltafeln mit Faserbündel-Bewehrung zur Rationalisierung
Reinhardt, H.W. (Autor:in)
Techtextil, Techtextil Symposium, 8 ; 5 ; 1-7
1999
7 Seiten, 3 Bilder, 4 Tabellen, 7 Quellen
(nicht paginiert)
Aufsatz (Konferenz)
Englisch
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