| 摘要 |
PROBLEM TO BE SOLVED: To provide a centrifugal casting method of concrete, which is easy to knead concrete to be used, and enables the manufacture of ultrahigh strength concrete products, and also can be operated industrially stably. SOLUTION: The centrifugal casting method of concrete comprises a process of kneading and mixing a cement composition in which water/bonding agent ratio is 20 mass% or less, and a high-performance AE water reducing agent to prepare concrete in which a slump flow is 50 cm or more, a process of throwing the prepared concrete in a formwork of a centrifugal molding machine while rotating slowly the formwork, a process of adding to the concrete an additive having a bad compatibility with the high-performance AE water reducing agent to decrease the fluidity of the concrete, and a process of rotating the formwork at high speed after the decrease in fluidity of the concrete. COPYRIGHT: (C)2009,JPO&INPIT
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