| 摘要 |
PURPOSE:To lessen repairing operations after excavation as well as eliminate deterioration of mud water by a method in which concrete mixture to be places is controlled to have a given slump flow and a practically zero bleeding amount by the addition of a thickening agent and a fluidizing agent. CONSTITUTION:Concrete mixture is placed through a number of tremie tubes while immersing the discharge ends of the tremie tubes in the concrete mix, where a thickening agent and a fluidizing agent are added to the concrete mix to regulate its bleeding amount to practically zero with a slump flow of 45-60 cm. The occurrence of bleeding can thus be almost prevented, and thereby apertures and water lens by bleeding can be avoided.
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