Research Article
Experimental Study on Physical-Mechanical Properties of Expansive Soil Improved by Multiple Admixtures
Table 14
Multi-index analysis of test results.
| Index | A (coal gangue) | B (fly ash) | C (lime) | D (null) |
| The plastic index/% | k1 | 15.927 | 16.453 | 17.327 | 14.930 | k2 | 14.453 | 13.637 | 15.463 | 14.300 | k3 | 13.237 | 13.527 | 10.827 | 14.387 | Range R | 2.690 | 2.926 | 6.500 | 0.630 | Primary and secondary factors | C > B > A | Optimal solution | C3B3A3 |
| Free expansion rate/% | k1 | 25.533 | 25.133 | 24.800 | 23.400 | k2 | 22.067 | 23.333 | 24.200 | 23.700 | k3 | 22.667 | 21.800 | 21.267 | 23.167 | Range R | 3.466 | 3.333 | 3.533 | 0.533 | Primary and secondary factors | C > A > B | Optimal solution | C3A2B3 |
| Shear strength/kPa | k1 | 184.400 | 190.500 | 181.233 | 209.367 | k2 | 212.333 | 204.367 | 197.333 | 199.600 | k3 | 204.267 | 206.133 | 222.433 | 192.033 | Range R | 27.933 | 15.633 | 41.200 | 17.334 | Primary and secondary factors | C > A > B | Optimal solution | C3A2B3 |
| The unconfined compressive strength/kPa | k1 | 1093.913 | 1146.270 | 1116.143 | 1186.313 | k2 | 1255.387 | 1188.337 | 1160.413 | 1195.317 | k3 | 1227.830 | 1242.523 | 1300.573 | 1195.500 | Range R | 161.474 | 96.253 | 184.430 | 9.187 | Primary and secondary factors | C > A > B | Optimal solution | C3A2B3 |
|
|