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Marshall Stability Test Apparatus
The Marshall Stability Test Apparatus is used in pavement engineering to measure the stability and flow values of bituminous mixtures, helping determine their suitability for road construction.
🔧 Marshall Stability Test Apparatus Specifications| Loading Frame | Motorized or hand-operated with a constant deformation rate |
| Loading Rate | 50.8 mm/min (±5%) as per ASTM D6927 / AASHTO T245 |
| Proving Ring / Load Cell | Capacity: 50 kN or 5,000 kgf (with 0.01 kN or 0.1 kgf resolution) |
| Flow Meter | Dial gauge with 0–25 mm range and 0.01 mm least count |
| Specimen Size | Cylindrical specimens: 101.6 mm (4 inch) diameter × 63.5 mm height |
| Breaking Head | Two-piece steel segment to hold the specimen during loading |
| Specimen Mold | Steel mold with collar and base plate, 101.6 mm internal diameter |
| Compaction Hammer | 4.5–5.5 kg weight; falling height 457 mm (18 inches) |
| Compaction Pedestal | Steel pedestal with rubber pad and guide rod for hammer |
| Heating Bath | Thermostatically controlled, 60°C ± 1°C water bath for specimen conditioning |
| Power Supply | 220V / 50–60 Hz, single phase (for motorized units) |
| Compliance | ASTM D6927, AASHTO T245, and IS: 1201 to 1203 |
Marshall Stability: Maximum load (in kN or kgf) before specimen failure
Flow Value: Deformation (in mm) corresponding to maximum load
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Yelahanka, Bangalore, Karnataka 
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