Description
The standard Proctor compaction apparatus is a fundamental tool in geotechnical laboratories for performing the Standard Proctor Test (also called Light Compaction Test). This apparatus accurately determines the Maximum Dry Density (MDD) and Optimum Moisture Content (OMC) of soils, essential for ensuring stable foundations
In contrast, the Modified Proctor apparatus uses a heavier 4.89 kg hammer and 450 mm drop for higher-energy applications like airports or heavy highways (ASTM D1557). For more on the differences, see this detailed guide on Proctor Compaction Tests MDD moulds/Proctor Compaction Test Apparatus 4” Mould & Hammer 2.5 Kg
this test simulates lighter field compaction (e.g., smaller rollers). It helps create a moisture-density curve to identify the OMC where MDD is achieved, ensuring soil stability and load-bearing capacity
Technical Parameter
| Standard | Hammer Type | Internal Dia(mm) | Body Height (mm) | Hammer Weight(kgs) | Drop (mm) |
| ASTM | Light | ∅101.6 | 116.4 | 2.5 | 305 |
| Heavy | ∅152.4 | 177.8 | 4.54 | 457 | |
| Hammer Type | Internal Dia(mm) | Body Height (mm) | Hammer Weight(kgs) | Drop (mm) | |
| BS | Light | ∅101.6 | 127 | 2.5 | 305 |
| Heavy | ∅152.4 | 127 | 4.54 | 457 | |
| Hammer Type | Internal Dia(mm) | Body Height (mm) | Hammer Weight(kgs) | Drop (mm) | |
| EN | Light | ∅100 | 127 | 2.5 | 300 |
| Heavy | ∅152 | 127 | 4.5 | 450 | |
| Hammer Type | Internal Dia(mm) | Body Height (mm) | Hammer Weight(kgs) | Drop (mm) | |
| GB | Light | ∅102 | 116 | 2.5 | 305 |
| Heavy | ∅152 | 116 | 4.5 | 457 |
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