| 摘要 |
PROBLEM TO BE SOLVED: To provide a rebound reducing agent excellent in a rebound reducing effect of fast hardening spraying concrete. SOLUTION: The rebound reducing agent contains first and second water soluble low molecular compounds selected from (1) a combination of a compound selected from amphoteric surfactants and a compound selected from anionic surfactants, (2) a combination of a compound selected from cationic surfactants and a compound selected from anionic aromatic compounds and (3) a combination of a compound selected from cationic surfactants and a compound selected from brominated compounds. |
