Research Article
Investigation of the Effect of Crumb Rubber Powder and Warm Additives on Moisture Resistance of SMA Mixtures
Table 1
The physical characteristics of aggregate.
| | Characteristics | Standards | Results | Regulation limits |
| | Special gravity (coarse grains) | | | | | Apparent | ASTM: C127 | 2.69 | — | | Effective | 2.64 | — | | Bulk | 2.61 | — | | Specific gravity (fine grains) | | | | | Apparent | ASTM: C128 | 2.68 | — | | Effective | 2.63 | — | | Bulk | 2.61 | — | | Specific gravity (filler) | ASTM: D854 | 2.55 | — | | Flat and elongated particles (%) | ASTM: D5821 | 94 | Minimum 10 | | Water absorption (%) | ASTM: C127 | 0.8 | Maximum 2 | | Needle and flake particles | ASTM: D4791 | 9 | Maximum 15 | | Sodium sulfate soundness (%) | ASTM: C88 | 7 | Maximum 15 | | Los Angeles abrasion (%) | ASTM: C131 | 22.3 | Maximum 30 |
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