HIGH FLUIDITY CONCRETE AND INSTALLATION METHOD OF COATED CONCRETE USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide high fluidity concrete capable of suitably being used in an installation construction of a coated concrete of a tunnel which is difficult to be proceeded with a good aspect and an installation method of the coated concrete of a tunnel using the same.SOLUTION: There is provided high fluidity concrete by mixing a water-reducing agent and a thickener with base concrete containing a binding material, an aggregate and water, where the water-reducing agent is a naphthalene-based high performance water-reducing agent, the water-reducing agent is contained in the high fluidity concrete at 0.3% to 1.0% by mass ratio in terms of solid content, the thickener is contained at 0.01% to 0.11% by water mass ratio, initial slump flow is 540 nm or more, temporal slump flow after 60 minutes of 500 nm or less and temporal slump flow loss after 60 minutes of 50 mm/h to 200 m/h.SELECTED DRAWING: Figure 1