FINE AGGREGATE FOR CONCRETE OR MORTAR, METHOD FOR CONTROLLING ALKALI-AGGREGATE REACTION IN CONCRETE OR MORTAR, METHOD FOR CONTROLLING ALKALI-AGGREGATE REACTION OF FINE AGGREGATE FOR CONCRETE OR MORTAR AND GRANULAR BLAST FURNACE SLAG FOR MIXING FINE AGGREGATE

摘要

PPROBLEM TO BE SOLVED: To propose a fine aggregate for concrete or mortar, by which an alkali-aggregate reaction can be controlled effectively, in which the fine aggregate, which is hardly used up to now and judged to be not harmless, can be used, by which a destruction problem of the environment due to collection of river sand or sea sand can be avoided and in which blast furnace slag to be produced as a by-product in large quantities when pig iron is manufactured can be used effectively. PSOLUTION: The fine aggregate for concrete or mortar contains the fine aggregate, which is judged to be not harmless when tested in the alkali-aggregate reaction according to the alkali-silica reactivity test methods (JIS A 1145 and JIS A 1146), and 5-40 wt.% granular blast furnace slag having 0.3 mm particle size. PCOPYRIGHT: (C)2009,JPO&INPIT