Pillar formwork

Abstract

A column formwork for use in concrete construction is described, comprising a planar member 1 constituting the formwork, and at least one connecting section provided for form-fit connecting two opposing edges 3, 3 ′ of the planar member ( 1 ) and thus for constituting a tube segment, wherein at least the connecting-section surface facing the planar member 1 exhibits a substantially constant curvature that substantially corresponds to the curvature of the tube segment.

1 - 17 . (canceled)  
   
   
       18 . A column formwork for use in concrete construction, comprising a planar formation ( 1 ) constituting the formwork, and at least one connecting section provided for positively connecting two opposing edges ( 3 ,  3 ′) of the planar formation ( 1 ) and thus for constituting a tube segment, wherein at least the connecting-section surface ( 4 ,  4 ′) facing the planar formation ( 1 ) exhibits a substantially constant curvature and the curvature substantially corresponds to the curvature of the tube segment, and wherein the planar formation ( 1 ) exhibits a thickness of 1 to 4 mm and comprises an elastic synthetic material, namely a fiber reinforced synthetic material or a carbon reinforced synthetic material.  
   
   
       19 . The column formwork according to  claim 18 , characterized in that a glass fiber reinforced synthetic material or glass fiber reinforced or carbon reinforced polyester is used as the elastic synthetic material.  
   
   
       20 . The column formwork according to  claim 18 , characterized in that the planar formation ( 1 ) exhibits a thickness of 1.2 to 3 mm.  
   
   
       21 . The column formwork according to  claim 18 , characterized in that the planar formation ( 1 ) exhibits a thickness of 1.4 to 2.5 mm, especially a thickness of 1.5 to 2 mm.  
   
   
       22 . The column formwork according to  claim 18 , characterized in that, additionally, the connecting-section ( 2 ,  2 ′) surface ( 5 ,  5 ′) facing away from planar formation ( 1 ) exhibits a constant curvature, this curvature differing from the curvature of the tube segment.  
   
   
       23 . The column formwork according to  claim 18 , characterized in that the connecting section ( 2 ,  2 ′) is constructed of synthetic material.  
   
   
       24 . The column formwork according to  claim 18 , characterized in that the connecting section ( 2 ,  2 ′) is constructed of polyester, of a fiber reinforced synthetic material, especially of glass fiber reinforced or carbon reinforced synthetic material, particularly preferably of glass fiber reinforced or carbon reinforced polyester.  
   
   
       25 . The column formwork according to  claim 18 , characterized in that the planar formation ( 1 ) and the connecting section ( 2 ,  2 ′) consist of the same material.  
   
   
       26 . The column formwork according to  claim 18 , characterized in that the connecting section ( 2 ,  2 ′) extends in the direction of the tube-segment axis over the entire length of the tube segment.  
   
   
       27 . A column formwork for use in concrete construction, comprising a planar formation ( 1 ) constituting the formwork, and two connecting sections ( 2 ,  2 ′) provided for positively connecting two opposing edges ( 3 ,  3 ′) of the planar formation ( 1 ) and thus for constituting a tube segment, wherein at least the connecting-section surface ( 4 ,  4 ′) facing the planar formation ( 1 ) exhibits a substantially constant curvature and the curvature substantially corresponds to the curvature of the tube segment, and wherein the planar formation ( 1 ) exhibits a thickness of 1 to 4 mm and comprises an elastic synthetic material, namely a fiber reinforced synthetic material or a carbon reinforced synthetic material.  
   
   
       28 . The column formwork according to  claim 27 , characterized in that a glass fiber reinforced synthetic material or glass fiber reinforced or carbon reinforced polyester is used as the elastic synthetic material.  
   
   
       29 . The column formwork according to  claim 27 , characterized in that the planar formation ( 1 ) exhibits a thickness of 1.2 to 3 mm.  
   
   
       30 . The column formwork according to  claim 27 , characterized in that the planar formation ( 1 ) exhibits a thickness of 1.4 to 2.5 mm, especially a thickness of 1.5 to 2 mm.  
   
   
       31 . The column formwork according to  claim 27 , characterized in that, additionally, the connecting-sections ( 2 ,  2 ′) surface ( 5 ,  5 ′) facing away from planar formation ( 1 ) exhibits a constant curvature, this curvature differing from the curvature of the tube segment.  
   
   
       32 . The column formwork according to  claim 27 , characterized in that the connecting sections ( 2 ,  2 ′) exhibit, in the direction of the tube-segment tangent perpendicular to the tube-segment axis, an extension (t) of 1 to 50%, especially 3 to 25% of the tube-segment diameter.  
   
   
       33 . The column formwork according to  claim 27 , characterized in that the connecting sections ( 2 ,  2 ′) exhibit, in the direction of the tube-segment tangent perpendicular to the tube-segment axis, an extension (t) of 5 to 15%, especially about 10% of the tube-segment diameter.  
   
   
       34 . The column formwork according to  claim 27 , characterized in that the connecting sections ( 2 ,  2 ′) exhibit, in the direction of the tube-segment tangent perpendicular to the tube-segment axis, an extension (t) of 10 to 100 mm, especially 20 to 75 mm.  
   
   
       35 . The column formwork according to  claim 27 , characterized in that the connecting sections ( 2 ,  2 ′) exhibit, in the direction of the tube-segment tangent perpendicular to the longitudinal axis of the tube segment, an extension (t) of 30 to 50 mm, especially 35 to 45 mm.  
   
   
       36 . The column formwork according to  claim 27 , characterized in that the connecting sections ( 2 ,  2 ′) are constructed of synthetic material.  
   
   
       37 . The column formwork according to  claim 27 , characterized in that the connecting sections ( 2 ,  2 ′) are constructed of polyester, of a fiber reinforced synthetic material, especially of glass fiber reinforced or carbon reinforced synthetic material, particularly preferably of glass fiber reinforced or carbon reinforced polyester.  
   
   
       38 . The column formwork according to  claim 27 , characterized in that the planar formation ( 1 ) and the connecting sections ( 2 ,  2 ′) consist of the same material.  
   
   
       39 . The column formwork according to  claim 27 , characterized in that the connecting sections ( 2 ,  2 ′) extend in the direction of the tube-segment axis over the entire length of the tube segment.  
   
   
       40 . The column formwork according to  claim 27 , characterized in that the connecting sections ( 2 ,  2 ′) exhibit grooves and tongues ( 6 ) that engage precisely to connect the edges ( 3 ,  3 ′) of the planar formation ( 1 ).  
   
   
       41 . The column formwork according to  claim 27 , characterized in that the grooves ( 6 ) exhibit longitudinally running seals ( 7 ).