Table 8 Changes in pH by stirring times with H2SiF6.
From: Evaluation on the Surface Modification of Recycled Fine Aggregates in Aqueous H2SiF6 Solution
H2SiF6 | pH before stirring | pH by stirring time | |||
|---|---|---|---|---|---|
0 min | 1 min | 3 min | 5 min | ||
8 g mixed | 11.53 | 4.39 | 5.85 | 9.84 | 10.32 |
10 g mixed | 11.52 | 3.84 | 4.89 | 8.24 | 9.52 |
12 g mixed | 11.51 | 3.63 | 4.17 | 6.58 | 8.64 |