Research Article
Utilization of Electroplating Sludge as Subgrade Backfill Materials: Mechanical and Environmental Risk Evaluation
Table 3
Unconfined compression strength of lime-coal fly ash stabilized materials (MPa).
| Structure layer | Highway grade | Special heavy traffic | Heavy traffic | Light traffic |
| Base | Motorways and first-grade highway | ≥1.1 | ≥1.0 | ≥0.9 | Second-grade and under second-grade highway | ≥0.9 | ≥0.8 | ≥0.7 |
| Sub-base | Motorways and first-grade highway | ≥0.8 | ≥0.7 | ≥0.6 | Second-grade and under second-grade highway | ≥0.7 | ≥0.6 | ≥0.5 |
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