Polymeric Aggregate Treatment System Tables
TABLES AND FIGURES
Table 1. Stockpile percentages and gradations for Lockwood aggregate.
| Sieve Size | Stockpiles and Percentages | |||||
| 19.0 mm (30%) |
12.5 mm (15%) |
9.5 mm (10%) |
Rock Dust (35) |
Bank Sand (10%) |
Blend | |
| 25 | 100 | 100 | 100 | 100 | 100 | 100 |
| 19 | 98.7 | 100 | 100 | 100 | 100 | 99.6 |
| 12.5 | 24.4 | 97.6 | 100 | 100 | 100 | 77.0 |
| 9.5 | 2.0 | 36.1 | 97.0 | 100 | 100 | 60.7 |
| 4.75 | 0.8 | 0.9 | 21.1 | 97.0 | 100 | 46.4 |
| 2.36 | 0.6 | 0.4 | 2.2 | 66.2 | 100 | 33.6 |
| 1.18 | 0.5 | 0.3 | 1.2 | 41.1 | 99.7 | 24.7 |
| 0.6 | 0.5 | 0.3 | 1.0 | 26.6 | 92.8 | 18.9 |
| 0.3 | 0.5 | 0.3 | 0.9 | 18.2 | 55.3 | 12.2 |
| 0.15 | 0.5 | 0.3 | 0.8 | 13.3 | 18.9 | 6.8 |
| 0.075 | 0.5 | 0.3 | 0.7 | 10.3 | 6.8 | 4.6 |
Table 2. Stockpiles percentages and gradations for Elko aggregate.
| Sieve Size (mm) | Stockpiles and Percentages | ||||
| Coarse (28%) |
Medium (8.0%) |
Crushed Fines (54%) |
Natural Fines (10) |
Blend | |
| 25 | 100 | 100 | 100 | 100 | 100 |
| 19 | 100 | 100 | 100 | 100 | 100 |
| 12.5 | 90.0 | 100 | 100 | 100 | 97.1 |
| 9.5 | 36.0 | 97.0 | 100 | 98.0 | 81.6 |
| 4.75 | 7.0 | 7.0 | 83.0 | 77.0 | 55.0 |
| 2.36 | 3.0 | 3.0 | 56.0 | 61.0 | 37.4 |
| 1.18 | 2.0 | 2.0 | 37.0 | 45.0 | 25.2 |
| 0.6 | 2.0 | 1.0 | 25.0 | 28.0 | 16.9 |
| 0.15 | 1.0 | 1.0 | 13.0 | 8.0 | 8.2 |
| 0.075 | 1.0 | 1.0 | 10.0 | 6.0 | 6.4 |
Table 3. Physical properties of the aggregates.
| Fraction | Specific Gravity (bulk) |
Absorption Capacity (%) |
Uncompacted Void Content | Sand Equivalent | Fractured Face | Flat & Elongated (%) |
| Criteria* | 45 min. | 40 min. | 75 min. | 10 max. | ||
| Lockwood Aggregate | ||||||
| Coarse | 2.665 | 2.19 | 100 | 0.2 | ||
| Fine | 2.628 | 1.77 | 56.2 | 75.3 | ||
| Elko Aggregate | ||||||
| Coarse | 2.705 | 2.42 | 97.2 | 0.7 | ||
| Fine | 2.839 | 1.91 | 55.0 | 78.1 | ||
* Superpave criteria based on less than 3 million ESALs and 100 mm of depth from surface.
Table 4. Laboratory testing program.
| Aggregate | Antistrip Additive | ||||
| None | UP-5000 0.75 lb/ton |
UP-5000 1.0 lb/ton |
UP-5000 1.5 lb/ton |
Hydrated Lime 1.5% |
|
| Lockwood | ML | L | ML | L | ML |
| Elko | ML | L | ML | L | ML |
M: Hveem Mix Design
L: Mr at three temperatures plus Mr and TS at the wet and dry stages.
Table 5. Summary of the mixtures volumetric properties at optimum asphalt contents with Hveem compaction.
| Additive | Optimum AC (%DWA) |
Air Voids (%) |
Stability | VMA (%) |
Superpave Criterion |
VFA (%) |
Superpave* Criterion |
|
Lockwood Aggregate Source |
|||||||
| None | 5.75 | 4.0 | 40 | 14.5 | min 13 | 72 | 65-75 |
| Lime ** | 5.75 | 4.0 | 40 | 14.8 | min 13 | 72 | 65-75 |
| UP_500*** | 4.90 | 4.0 | 39 | 13.3 | min 13 | 71 | 65-75 |
| Elko Aggregate Source | |||||||
| None | 6.25 | 4.0 | 37 | 16.8 | min 14 | 75 | 65-75 |
| Lime | 6.50 | 5.0 | 41 | 16.8 | min 14 | 69 | 65-75 |
| UP-5000 | 6.10 | 4.3 | 39 | 16.8 | min 14 | 75 | 65-75 |
* Superpave criterion for traffic level of 3 million ESALs.
** Lime at 1.5% by dry weight of aggregate
*** UP-5000 at 1.0 lb/ton of dry aggregate
Table 6. Tensile strength properties of the Lockwood mixtures.
| Aggregate/ Addititve |
Unconditioned Mixtures | Conditioned Mixtures | ||
| Air Voids (%) | Tensile Strength at 77°F (psi) |
Air Voids (%) | Tensile Strength at 77°F (psi) |
|
| Lockwood / None | 6.8 | 68.0 | 6.6 | 48.3 |
| Lockwood / Lime at 1.5 percent |
6.4 | 67.5 | 6.4 | 68.6 |
| Lockwood / UP-5000 at 0.75 lb/ton |
7.3 | 86 | 7.3 | 68.6 |
| Lockwood / UP-5000 at 1.0 lb/ton |
6.4 | 93.5 | 6.9 | 75.1 |
| Lockwood / UP-5000 at 1.5 lb/ton |
7.1 | 81.1 | 6.6 | 81.5 |
Table 7. Resilient modulus properties of the Lockwood mixtures.
| Aggregate / Additive |
Unconditioned Mixtures | Conditioned Mixtures | ||
| Air Voids (%) | Resilient Modulus at 77°F (ksi) |
Air Voids (%) | Resilient Modulus at 77°F (ksi) |
|
| Lockwood / None | 6.8 | 169 | 6.6 | 127 |
| Lockwood / Lime at 1.5 percent |
6.4 | 156 | 6.4 | 156 |
| Lockwood / UP-5000 at 0.75 lb/ton |
6.3 | 190 | 6.3 | 147 |
| Lockwood / UP-5000 at 1.0 lb/ton |
6.1 | 178 | 6.1 | 149 |
| Lockwood / UP-5000 at 1.5 lb/ton |
6.0 | 231 | 6.0 | 205 |
Table 8. Tensile strength properties of the Elko mixtures.
| Aggregate/ Addititve |
Unconditioned Mixtures | Conditioned Mixtures | ||
| Air Voids (%) | Tensile Strength at 77°F (psi) |
Air Voids (%) | Tensile Strength at 77°F (psi) |
|
| Elko / None | 7.1 | 62.2 | 7.1 | 36.3 |
| Elko / Lime at 1.5 percent |
6.8 | 68.9 | 7.0 | 52.7 |
| Elko / UP-5000 at 0.75 lb/ton |
7.1 | 76.1 | 7.2 | 54.6 |
| Elko / UP-5000 at 1.0 lb/ton |
6.8 | 78.8 | 7.0 | 57.4 |
| Elko / UP-5000 at 1.5 lb/ton |
6.9 | 76.4 | 6.9 | 63.6 |
Table 9. Resilient modulus properties of the Elko mixtures.
| Aggregate / Additive |
Unconditioned Mixtures | Conditioned Mixtures | ||
| Air Voids (%) | Resilient Modulus at 77°F (ksi) |
Air Voids (%) | Resilient Modulus at 77°F (ksi) |
|
| Elko / None | 7.1 | 242 | 7.1 | 89 |
| Elko / Lime at 1.5 percent |
6.9 | 176 | 6.9 | 151 |
| Elko / UP-5000 at 0.75 lb/ton |
7.2 | 194 | 7.2 | 118 |
| Elko / UP-5000 at 1.0 lb/ton |
7.0 | 175 | 7.0 | 117 |
| Elko / UP-5000 at 1.5 lb/ton |
6.9 | 179 | 6.9 | 124 |
Table 10. Retained strength ratios for all mixtures.
| Additive | Lockwood Aggregate Source | Elko Aggregate Source | ||
| TS Ratio (%) | Mr Ratio (%) | TS Ration (%) | Mr Ratio (%) | |
| None | 71 | 75 | 58 | 37 |
| Lime at 1.5 Pecent |
100 | 100 | 76 | 86 |
| UP-5000 at 0.75 lb/ton |
80 | 77 | 72 | 61 |
| UP-5000 at 1.0 lb/ton |
80 | 84 | 73 | 67 |
| UP-5000 at 1.5 lb/ton |
100 | 89 | 83 | 70 |