| 摘要 |
PROBLEM TO BE SOLVED: To provide a sheath tube for a prestressing steel which is capable of improving the filling ratio of a viscous material. SOLUTION: In a sheath tube 10, a straight portions 12 parallel to a prestressing steel 50 in its sectional shape is provided on a projecting part 11, and the width w1 of the straight portion 12 is set to be larger than the projecting dimension h of the projecting portion 11. Thus, inside the projecting portion 11, a viscous material 53 flows along the straight portion 12 to make an eddy difficult to generate. Since the inside of the projecting portion 11 is filled with the viscous material without being largely delayed relative to the viscous material 53 flowing along the surface of the prestressing steel 50, an incompletely filled portion like a conventional one becomes difficult to generate, and the filling ratio of the viscous material 53 can be improved.
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