Research Article
Study on Compaction Characteristics and Construction Control of Mixtures of Red Clay and Gravel
Table 3
Minimum strength and compaction degree of highway subgrade construction.
| | Project classification | Subgrade part | Depth (m) | CBR (%) | Maximum particle size of packing (mm) | Compactness (%) |
| | Fill subgrade | Upper roadbed | 0–0.3 | 8 | <100 | >97 | | Lower roadbed | 0.3–0.8 | 5 | <100 | >97 | | Upper embankment | 0.8–1.5 | 4 | <150 | >95 | | Lower embankment | >1.5 | 3 | <150 | >93 |
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