| abstract |
[Problem] To provide a chemical agent that is capable of reducing the undesirable effects of impurities, etc., particularly carbon content such as unburned carbon, included in a hydraulic composition and is particularly capable of suppressing adverse effects. [Solution] A carbon blocker (CB) for hydraulic compositions, including a mixture having a structure indicated by general formula (1) and comprising at least one compound selected from a group comprising ester compounds and ether compounds such as phosphate esters, sulfate esters, sulfamate esters, and alkyl ethers, etc. (In the formula, R 1 indicates a hydrogen atom, an alkyl group, an alkenyl group, or a (meth) acryloyl group, X 1 indicates a divalent group having at least one aromatic ring, a indicates 0 or 1, A 1 O indicates a C2-3 oxyalkylene group, n indicates 2-150, and * indicates a bond end with a phosphorous atom in a phosphate ester, a sulfur atom in a sulfate ester or sulfamate ester, or a carbon atom in an alkyl group, etc., in an alkyl ester.) |