Skip to main content

Table 4 Aggregate Quality Requirements for Porous Asphalt Mixture

From: Review of porous asphalt pavements in cold regions: the state of practice and case study repository in design, construction, and maintenance

Aggregate Property NAPA IS 115 (2002) [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)
  1. aAdditional aggregate tests include durability tests for coarse aggregates (ODOT TM 208) and harmful substances (AASHTO T113)
  2. bThe requirements depend on the ESAL
  3. cAddtional aggregate requirements include clay content (AASHTO T 176) less than 30%, total spall in fraction retained on No. 4 Sieve less than 2.5%, spall content in total sample less than 2.5%, and percent slumps in fraction retained on No. 4 Sieve less than 0.5%