| 摘要 |
PROBLEM TO BE SOLVED: To provide a spraying cement composition which can be used mainly in road works or its repairing works by spraying to the inner surfaces of tunnels, slopes or for stabilizing natural ground and slopes, enables the workers to work under good environmental conditions even in small working spaces, stabilizes the natural ground and bed rocks with a thickness of 2-3cm with high strength development after spraying and high working efficiency. SOLUTION: This cement composition contains cement, aggregates with a maximum particle size of 2.5mm, a hydrated lime-containing substance and an alkali metal aluminate. In addition, it may contains phosphate or organic acid and, when needed, fibers. In the spraying operation, the A liquid containing cement and the like and the B liquid containing an alkali metal aluminate are forcedly fed to the sprayer separately and hardened. |
