CENTRIFUGAL FORCE CONCRETE PRODUCT AND ITS MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide the improvements of concrete workability, extensibility in centrifugal molding, plugging at an end part, a rock pocket, a honeycomb and the like in a centrifugally cast concrete product and in its manufacturing method using high strength admixtures such as silica fumes and/or plasters and the like and to provide a high quality product molded with centrifugal force. SOLUTION: The centrifugally cast concrete product comprises a binding material, fine aggregate, coarse aggregate and a high performance water reducer or a high performance AE water reducer. The binding material consists of cement, silica fume of 2-15 pts.mass and/or plasters of 10 pts.mass at a maximum in terms of an anhydride and fly ash classified to 20μm or less of 0.5-8 pts.mass to 100 pts.mass of cement. The centrifugally cast concrete product having a unit binding material amount of 400-650 kg/m3and a water rate to the binding material of 35 mass% or less is manufactured by the centrifugal molding of concrete and by curing under insulating or normal pressure steaming. COPYRIGHT: (C)2007,JPO&INPIT