NON-DISPERSIBLE UNDERWATER CONCRETE COMPOSITION AND HARDENED BODY THEREOF, AND METHOD FOR PRODUCING NON-DISPERSIBLE UNDERWATER CONCRETE

摘要

PROBLEM TO BE SOLVED: To provide a non-dispersible underwater concrete composition that exhibits a high underwater non-dispersibility with less thickener than the conventional non-dispersible underwater concrete composition and has a shortened setting time.SOLUTION: The non-dispersible underwater concrete composition is provided which contains cement, water, thickener, accelerator comprising at least calcium nitrite, and dispersant, and which is characterized in that: the unit cement content of the cement is 300 to 500 kg/m; the unit water content of the water is 170 to 200 kg/m; the blending quantity of the thickener with respect to the unit water content is 0.7 to 1.2 mass%; the blending quantity of the accelerator with respect to the unit cement content is 0.5 to 3.0 mass%; and the blending quantity of the dispersant with respect to the unit cement content is 4.0 mass% or less.SELECTED DRAWING: None