| 摘要 |
<p>1533672 Silica cement composition SOUTHWEST RESEARCH INSTITUTE 4 June 1976 [30 July 1975] 23130/76 Headings C1A and C1J Cement compositions consist of (I) (a) spray dried microspheres of hydrated sodium silicate powder with weight ratio of SiO 2 : Na 2 O of 2À4:1 to 3À22:1, and (b) K 2 SiF 6 and/or Na 2 SiF 6 ; (II) (a) spray-dried microspheres of hydrated potassium silicate powder having a wt. ratio of SiO 2 K 2 O in the range 2.4:1 to 3À22: 1, and (b) Na 2 SiF 6 . Siliceous fillers may be added to the formulation e.g. sand, silica flour, flyash, siliceous clays and other argillaceous minerals of high silica content.</p> |
