| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a centrifugally molded product by which a centrifugally molded product of successful quality can be manufactured through the steps of firmly compacting a non-compact and soft paste layer formed on the inner face of a centrifugally molded object of a concrete at a low water bonding material ratio and a concrete added with a cement wash preventive material regardless of the water bonding material ratio, promoting the dehydration of the paste layer and increasing the strength of the centrifugally molded object. SOLUTION: This method for manufacturing the centrifugally molded product comprises the steps of charging a concrete into a frame and spreading 0.0005 to 0.25 g of a dehydrating agent in terms of solid content per 1 cm<SP>2</SP>of the inner area once or twice or more to the inner face of the cengtrifugally molded object until the end of a centrifugal molding process while rotating the frame. Thus, the method manufactures the centrifugally molded product by adding the cement wash preventive material. COPYRIGHT: (C)2004,JPO
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