| abstract |
(57) [Problem] To provide an excellent concrete composition which simultaneously satisfies material separation resistance and self-filling property. SOLUTION: This is a concrete composition containing cement, water, aggregate, and a copolymer (X), wherein the copolymer (X) is a hydrocarbon group having 5 to 30 carbon atoms, RA. repeating unit having a (a), the repeating unit having an R B is a hydrocarbon group having 4-29 carbon atoms (B), 1 to 2 carbon atoms A repeating unit (C) having R C , which is a hydrocarbon group of No. 8, and a repeating unit (D), and the carbon of the group represented by R A of the repeating unit (A) the number (x), the repeating unit number of carbon atoms of the group represented by the R B of (B) has (y) and the repeating unit (C) the number of carbon atoms of the group represented by the R C having the (z) Is a concrete composition satisfying the following relationship: x>y> z. |