Research Article
Research on Wetting-Drying Cycles’ Effect on the Physical and Mechanical Properties of Expansive Soil Improved by OTAC-KCl
Table 5
Results of unconfined compressive strength during cyclic wetting-drying process.
| Types of soil | Cycles | Unconfined compressive strength (kPa) | Strength loss (%) | Conditions of samples immersed in water |
| Natural soil | 0th cycles | — | — | Cracking after 10-minute immersion in water | — | — | — |
|
Improved soil | 0th cycles | 47.73 | — | Keeping good conditions without peelings | 2nd cycle | 41.24 | 13.6 | In good conditions basically, with a little amount of peelings on the edges | 4th cycle | 37.33 | 21.8 | In good conditions overall, with a little amount of cracks on the surface and peelings on the edges |
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