Table 4 Aggregate Quality Requirements for Porous Asphalt Mixture
Aggregate Property | NAPA IS 115 (2002)Â [29] | ASTM D7064/D7064M-08 [7] | Oregon Department of Transportation (ODOT) [42] a | Pennsylvania Department of Transportation (PennDOT) [45] | Minnesota Asphalt Pavement Association (MAPA) [36] c | UNHSC [59] | Maine Mall Project [44] | |
|---|---|---|---|---|---|---|---|---|
Coarse Aggregate | LA Abrasion (AASHTO T96; ASTM C131) | ≤30% | ≤30% | ≤30% | ≤ 35%–45%b | ≤ 35% | ≤ 40% | Mico-Deval ≤18% (AASHTO TP 58–99) |
Soundness Test (AASHTO T 104) | – | – | Sodium Sulfate Test | – | Magnesium Sulfate Test | – | – | |
Fractured Faces (AASHTO T335; ASTM D5821) | One Face: 100% min. | One Face: 95% min. | One Face (No.8): 75 min. | One Faceb: 55–100 min. | One Face: 55 min. | One Face: 90% min. | One Face: 100% min. | |
Two Faces: 90% min. | Two Faces: 90% min. | Two Faces (>No.4): 90 min. | Two Facesb: 80–100 min. | Two Faces: 75% min. | Two Faces: 90% min. | |||
Flat and Elongated Particles (ASTM D4791) | 5:1 ratio:  ≤ 5% | 5:1 Ratio:  ≤ 10% | 5:1 Ratio:  ≤ 10% | 5:1 Ratio:  ≤ 10% | 5:1 Ratio:  ≤ 5% | 3:1 ratio:  ≤ 8% | 5:1 ratio:  ≤ 5% | |
3:1 ratio:  ≤ 20% | 3:1 ratio:  ≤ 20% | |||||||
Absorption (AASHTO T85) | <  2% (Preferred) | – | – | – | ≤ 2% | – | – | |
Voids in Coarse Aggregate (VCA): VCAmix < VCAdrc (AASHTO T19) | Yes | Yes | – | – | Yes | – | Yes | |
Fine Aggregate | Angularity (AASHTO T304) | ≥ 45 | ≥ 40 | – | ≥ 40–45%b | – | – | ≥ 45 |
Sand Equivalent Test (AASHTO T176) | – | ≥ 45% | ≥ 45% | ≥ 40–50%b | – | – | ≥ 50% | |
Plasticity Index (AASHTO T90) | – | – | 0 or Non-Plastic | – | ≤ 4 (Mineral Filler) | ≤ 6 (Passing No.40) | ≤ 4 (Mineral Filler) | |