Modified Marshall Apparatus (6 inch)
The Modified Marshall Apparatus works on the same principle as the standard Marshall Apparatus but is scaled up to test larger, 6-inch diameter specimens, which is required when testing bituminous mixes containing larger maximum aggregate sizes that would not be representative in a standard 4-inch specimen. It uses a correspondingly larger breaking head and compaction equipment, following modified procedures and correction factors as specified in the relevant standard.
It consists of
,Marshall load frame 50kN
Breaking Head Stability Mould
Marshall Mould 152.4mm ID x 114.3 on high.
Base Plate for 152.4mm dia sample
Extension collar for 152.4 mm dia sample
Compaction Pedestal for 152.4 mm dia sample
Compaction Hammer 10.21 kg x 45 mm drop
Load Transfer Bar
Sample Ejector for 152.4 mm dia Sample
Dial Gauge 25 mm travel, 0.01mm least count
Proving Ring capacity 50 kN
| Standard Conformity | ASTM D5581 (6-inch Marshall method) |
| Specimen Diameter | 6 inch (152.4 mm) |
| Loading Rate | 50.8 mm/min (standard) |
| Application | Marshall stability & flow testing of larger bituminous mix specimens |
