MANUFACTURE OF CONCRETE PILE

摘要

PURPOSE: To provide a method for efficiently manufacturing a concrete pipe capable of efficiently defoaming without decreasing the strength without sludge. CONSTITUTION: Antifoaming agent is added to concrete, and the centrifugal force of a high speed at the time of centrifugal force molding is set to 15 to 30 times as large as a gravitational acceleration. It is preferable to add one or more types of sludge preventive material of sludge generated at the time of the centrifugal force molding, high strength intimate mixture and expansive material. The centrifugal force molding conditions except the high speed may be normal. Thus, the GN. of high speed can be reduced, the maintenance of a post manufacturing machine is easy and the power expenses can be reduced.