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AssigneeMitsubishi Heavy Industries, Ltd.
InventorHaruo Morishige
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The object of this invention is to provide a fiber-reinforced concrete cask that ensures easy working, enables reducing working cost, excels in strength, durability and heat resistance and enables minimizing cracking; a process for fabrication of the same; and a supporting frame for molding the concrete cask. In particular, concrete cask (10) formed through injecting and solidification of concrete (11) is characterized in that sheets of reinforcement fibers having a thermal expansion coefficient equal to or lower than that of concrete (11) are provided on at least the outer circumferential surface and the inner circumferential surface of the concrete cask (10) and that the inner circumferential surface of outer sheet (21) and the outer circumferential surface of inner sheet (22) are connected with each other by strings of reinforcement fibers (23). Preferably, carbon fibers are used as the reinforcement fibers.
A fiber reinforced concrete cask formed by injecting into and solidifying concrete within a support frame, wherein reinforcement fiber sheets are disposed at least on an outside circumference surface of said cask, said reinforcement fiber sheets have a coefficient of thermal expansion less than a coefficient of thermal expansion of the concrete, and said support frame is sewn together into a cylindrical bag shape and made from reinforcement fiber sheets.
A support frame for forming a concrete cask, wherein said support frame is made from reinforcement fiber sheets having a coefficient of thermal expansion that is less than a coefficient of thermal expansion of concrete used to form the concrete cask, and said support frame is sewn together into a cylindrical bag shape and made from the reinforcement fiber sheets.
A method of fabricating a concrete cask, comprising:
Dependencies are inferred from the claim text.