| 摘要 |
PURPOSE:To make it possible to take out concrete, the fluidity of which is favorable in placing, by a method wherein prefrozen solid fluidizing agent is mixed and kneaded with fresh concrete and the resultant fluidizing agent mixed concrete is carried to the predetermined placing site. CONSTITUTION:The predetermined amounts of cement 1 and of aggregate such as sand 3, gravel 4 and the like and of water 2 are fed in a concrete mixer 6 so as to be kneaded for producing fresh concrete and, after being added with 2-6kg/m<3> of prefrozen and solidified fluidizing agent, further kneaded. The resultant fluidizing agent mixed concrete is charged in an agitator truck 8 so as to be carried to a building site in the required period of time. The frozen and solidified fluidizing agent 5 starts thawing during the course of being carried to the building site. At the arrival of the truck to the building site, the fluidizing agent 5 fully thaws and disperses in the fresh concrete. The size of the fluidizing agent 5 is determined by the time required for being carried to the building site and the high or low atmospheric temperature during transport. |
