| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic blast furnace slag composition and a concrete cured body obtained by curing the same that simultaneously and sufficiently solve the problems that a concrete composition prepared by using blast furnace slag highly containing binding material produces a concrete cured body of low compressive strength, and a hydraulic blast furnace slag composition produces a concrete cured body of lowered compressive strength when undergoes thermal history of temperature rising due to heat evolution during curing by hydration reaction.SOLUTION: A hydraulic blast furnace slag composition containing the following strength enhancer by an amount of 0.01 to 0.50 pts.mass, as a part of an admixture, per 100 pts.mass of the following binding material. Binding material: containing blast furnace slag fine powder having a fineness of 3000 to 8000 cm/g by an amount of 40 to 80 mass%, Portland cement by an amount of 15 to 55 mass%, and sulfate by an amount of 1.0 to 5.0 mass% in terms of SO(the sum of blast furnace slag fine powder, Portland cement and sulfate is 100 mass%). Strength enhancer: water soluble dextrin compound that has a weight average molecular weight of 1000 to 20000 and a solubility into water at 21°C of 90% or more. |
