METHOD OF MANUFACTURING FLY-ASH ADDED READY MIXED CONCRETE HAVING ENHANCED EARLY STRENGTH AND SYSTEM FOR SAME REDUCING COST

摘要

PURPOSE: A method of manufacturing fly-ash added ready mixed concrete having an enhanced early strength is provided to efficiently prevent an early strength of ready mixed concrete being deteriorated as fly-ash is added without additional costs, and to reduce the production cost by putting more mixed materials. CONSTITUTION: The method of manufacturing fly-ash added ready mixed concrete having an enhanced early strength comprises the steps of determining primary inputting amounts of cements, fine aggregates, coarse aggregates and water inputted into ready mixed concrete according to a typical mixing determination method based on a ratio of water and cement, a maximum size of aggregate and a necessary strength, changing and determining secondary inputting amounts of cements, fine aggregates, coarse aggregates, water and fly-ash by reducing one of the amount of the fine aggregates, a sum of the amounts of the fine aggregates and cements and a sum of the amounts of the fine and coarse aggregates determined in the step of determining the primary inputting amounts as much as an added amount of the fly-ash required, and preparing and mixing the cements, fine aggregates, coarse aggregates, water and fly-ash according to each of the inputting amounts determined in the step of determining the secondary inputting amounts, thereby manufacturing the ready mixed concrete.