| 摘要 |
PURPOSE:To form composition which makes the best use of the characteristics of a liquid quick-setting agent and has quick-setting capacity durable to thick spraying by adding a specified additive at the time for compounding a kneaded substance consisting of cement, aggregate and water in case of preparing the quick-setting cement composition for spraying method which consists of cement, aggregate, water and the quick-setting agent. CONSTITUTION:In case of compounding a kneaded concrete substance for spraying method by kneading cement, water and an aggregate, and adding the aq. soln. of alkali aluminate or of both alkali aluminate and alkali carbonate to this kneaded substance and quick-setting this mixture, the following compds. are previously added at the time for compounding the above-mentioned kneaded substance. (1) phosphate, or phosphate and organic carboxylic acid, or its salt (2) calcium hydroxide and (3) alkali metal carbonate and/or alkali metal hydroxide. |
