| 摘要 |
PROBLEM TO BE SOLVED: To provide high strength spray concrete having all of properties capable of inhibiting flash setting such as a hindrance with regard to building, adding excellent adhesiveness during spray, increasing strength extremely quickly after spray and forming a sprayed article having extremely high strength by short time material age.SOLUTION: There is provided high strength spray concrete made by adding a powder additive containing a ground product of clinker of calcium aluminate having a content molar ratio of CaO and AlO(CaO/AlO) of 1.8 to 2.5 with a vitrification percentage of 90% or more containing silicon, magnesium and titanium of SiO; 4 to 6 mass%, MgO; 0.75 to 0.95 mass% and TiO; 0.8 to 1.3 mass% in terms of oxide, sodium aluminate and anhydrous gypsum to a cement composition containing 100 pts.mass of cement and 5 to 12 pts.mass of anhydrous gypsum, by an addition amount of 5 to 15 pts.mass based on 100 pts.mass of the cement content in the cement composition.SELECTED DRAWING: None |
