HYDRAULIC BLAST FURNACE SLAG COMPOSITION AND CONCRETE CURED BODY

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 plurality of 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, and also a hydraulic blast furnace slag composition has high S-value.SOLUTION: A hydraulic blast furnace slag composition containing the following admixture by an amount of 0.01 to 0.50 pts.mass 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%). Admixture: composed of two components of the following A component and the following B component, and containing A component by an amount of 50 to 99 mass% and B component by an amount of 1 to 50 mass% (total 100 mass%). A component: a water soluble dextrin compound having a weight average molecular weight of 1000 to 20000 and a solubility into water at 21°C of 90% or more. B component: a water soluble dextrin compound having a weight average molecular weight of 20001 to 50000 and a solubility into water at 21°C of 90% or more.