| abstract |
(57) [Summary] [Problem] Quick-setting material, shotcrete that has low addition, has quick setting property, enhances initial adhesion and initial strength development of concrete, and enables construction with extremely low rebound and dust amount And a spraying method using the same. SOLUTION: The quick-setting material containing calcium aluminate, alkali metal carbonate, alkali sulfate, alkali metal aluminate, and alkaline earth metal hydroxide, cement and the quick-setting material are contained. And a spraying method for spraying the sprayed concrete. |