| 摘要 |
PROBLEM TO BE SOLVED: To provide a super quick hardening agent capable of securing and adjusting proper working life of calcium aluminate having a very quick hardening property or a quick setting property to keep a stable state for example in an operation time needed during operation practically without reducing such properties.SOLUTION: There is a calcium aluminate-based super hardening agent containing a mixed calcium aluminate as an active ingredient consisting of (A) crystalline calcium aluminate having a content molar ratio of CaO and AlOof 1 to 1.5 and (B) amorphous calcium aluminate having the content molar ratio of CaO and AlOof 1.3 to 1.7 and the content molar ratio of CaO and AlOof (A) is lower by 0.1 or more than the content molar ratio of CaO and AlOof (B). |
