| 摘要 |
PROBLEM TO BE SOLVED: To obtain a quick setting agent and a spraying material which has no evil effect due to alkalis, improved adherence at the spraying, reduced rebound and good expression of strength in either short or long term. SOLUTION: This quick setting agent comprises aluminum sulfate, calcium aluminates and a water reducing agent. It may be in powder form. The spraying material comprises the quick setting agent and cement concrete. It may optionally include thickener, inorganic powder or fiber. |
