| abstract |
Provided is a concrete composition made up of a binder, water, a fine aggregate, a coarse aggregate, and a one-component admixture, in which a water/binder ratio is 30 to 70% by mass, a slump flow value is 35 to 75 cm, and a one-component admixture using four specific components and water is contained in a proportion of 0.5 to 3.0 parts by mass relative to 100 parts by mass of the binder. |