| 摘要 |
A concrete composition is provided to improve flowability, thereby raising workability according to the construction of a building and to show improved compressive strength and durability. A concrete composition comprises water, cement, sand, gravels and an admixture, wherein the concrete composition comprises 5 to 50 parts by weight of calcium carbonate and 0.5 to 1.5 parts by weight of an admixture on the basis of 100 parts by weight of the cement. Alternatively, a concrete composition comprises water, cement, sand, gravels and an admixture, wherein the concrete composition comprises 59 parts by weight of water, 17 to 19 parts by weight of calcium carbonate, 301 parts by weight of sand, 336 parts by weight of gravels and 0.5 to 1.5 parts by weight of the admixture on the basis of 100 parts by weight of the cement.
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