Title:
METHOD FOR MANUFACTURING CENTRIFUGALLY MOLDED PRODUCT
Document Type and Number:
Japanese Patent JP3874711
Kind Code:
B2
Abstract:
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 cm2 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.
Inventors:
Yoshiharu Watanabe
Hideo Nakatani
Hideo Nakatani
Application Number:
JP2002277080A
Publication Date:
January 31, 2007
Filing Date:
September 24, 2002
Export Citation:
Assignee:
DENKI KAGAKU KOGYO KABUSHIKI KAISHA
International Classes:
B28B21/32; B28B1/20; (IPC1-7): B28B21/32
Domestic Patent References:
| JP39025059B1 | ||||
| JP56161108A | ||||
| JP63060141A |