ADMIXTURE FOR CONCRETE, CONCRETE PRODUCT USING THE SAME AND PRODUCTION OF CONCRETE PRODUCT

PURPOSE:To increase the flowability of a concrete mixture, to unnecessitate a tamper process by vibration or the like in the producing process of a concrete product, to increase material separation resistance and exhibit high initial strength at the time of releasing from the mold after curing. CONSTITUTION:An admixture for concrete contains a natural polysaccharide obtained from the albumen section of seed of legume and containing >=70% galactomannan and a concrete mixture is made by using the admixture for concrete. The concrete product is produced by pouring the concrete mixture obtained by kneading a cement based powder, the natural saccharide made of the legume the aggregate, water and a water reducing agent into a molding flask to mold.