Specimen Design

6-inch Marshall specimen geometry and compaction parameters per ASTM D6926

📦
Marshall Specimen Geometry

Standard 4-inch diameter specimen for Marshall stability and flow testing

Diameter
101.6 mm (4.00 in)
Height
63.5 mm (2.50 in)
Compaction
75 blows per side
Hammer Mass
4536 g (10 lbs)
Drop Height
457 mm (18 in)
Target Air Voids
3% - 5%
VMA (Min)
> 13%
VFB Range
65% - 78%
Key Notes
  • Specimens prepared at 4 bitumen contents (typically 4.5%, 5.0%, 5.5%, 6.0%)
  • 3 specimens per bitumen content for statistical validity
  • Compaction temperature: 135-145°C (275-295°F)
  • Condition in 60°C water bath for 30-40 min before testing
  • Extrude carefully to avoid specimen damage
  • Measure bulk specific gravity (Gmb) per ASTM D2726
← Back to Asphalt & Marshall