LimsPulse
Construction materials testing

Proctor Compaction Apparatus

A cylindrical mould and a rammer of fixed mass and drop height used to compact soil at different water contents and find its maximum dry density (MDD) and optimum moisture content (OMC).

  • Geotechnical testing
  • Road and highway construction
  • Railways and airports
  • Dams and embankments
  • Construction materials testing
Photo of a Proctor Compaction Apparatus
Photo: Zaher.Kadour, CC BY-SA 3.0 (cropped), via Wikimedia Commons
CALIBRATION

Proctor apparatus calibration procedures

Rammer mass and drop height check

Weighs the light and heavy rammers, measures their free-fall height and face diameter, and checks mould volume, so that the compactive energy matches the standard.

Open procedure
QUALIFICATION

Instrument qualification (DQ · IQ · OQ · PQ)

  1. 01

    DQ — Design qualification

    Specifies moulds and rammers conforming to IS 2720 Parts 7 and 8 (or ASTM D698 / D1557) and, if needed, an automatic compactor.

  2. 02

    IQ — Installation qualification

    Records mould and rammer IDs and dimension certificates; for automatic compactors, checks installation and electrical safety.

  3. 03

    OQ — Operational qualification

    Checks rammer mass, face diameter and drop height, mould volume, and blow counting / distribution on automatic machines.

  4. 04

    PQ — Performance qualification

    Tests a reference soil periodically and compares MDD and OMC with established values.

In LimsPulse · Calibration Management

Keep every Proctor apparatus in control: usage logs, calibration and maintenance schedules, and automatic blocking of overdue instruments.

See how