| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic composition having excellent flowability and short-time settability and capable of providing hardened grout mortar excellent in strength developability, in a low-temperature environment.SOLUTION: The hydraulic composition comprises portland cement, a superplasticizer, a setting modifier containing a formate salt, an inorganic expanding agent, a metallic expanding agent, and a fine aggregate. The superplasticizer contains ≥0.1 pt.mass of a polycarboxylic acid-based one whose side chain length is >50 nm, and 0.1 to 0.2 pt.mass of a carboxylic acid-based one whose side chain length is ≤50 nm, to 100 pts.mass of the hydraulic components. |
