| 摘要 |
<p>PURPOSE: To simplify the production method by solidifying a sodium silicate aqueous solution and kaolin powder as raw materials at the ordinary temperature or in a steam-ageing state without calcining the kaolin powder. CONSTITUTION: For example, a sodium silicate aqueous solution in an amount of 42.9 pts.wt. kaolin powder in an amount of 51.4 pts.wt., potassium silicofluoride or blast-furnace water-granulated slag as a reaction accelerator in an amount of 5.7 pts.wt. based on the whole weight of the mixture are mixed, aged and solidified in air at room temperature for 28 days, and subsequently immersed in water for three days to obtain a specimen (A) from which unstable components are removed. Further, the specimen A is dried at room temperature for seven days to obtain a specimen (B). The specimen A has a flexural strength of 2.1-4.1MPa and a compression strength of 3.4-7.2MPa, and the specimen B has a flexural strength of 2.6-22.4MPa and a compression strength of 5.2-34.3MPa.</p> |
