Earth Materials Classification

Quality · Consistency · Delivery

Testing Capabilities

EMC are NATA accredited for the following Australian Standard (AS) and Main Roads Western Australia (WA) test methods:

Atterberg Limits

AS1289 3.1.1, 3.1.2, 3.2.1, 3.3.1, 3.2.2, 3.4.1, 3.9.1, 3.9.1

WA 120.1, 120.2, 121.1, 122.1, 123.1

Liquid Limit, Plastic Limit, Plasticity Index, Linear Shrinkage


Casagrande and Cone methods

Particle Size Distribution

Sieve Analysis


75mm to 75µm (Australian Standard)

75mm to 13.5µm (Main Roads WA)



AS1289 3.6.1

WA 115.1, 115.2

Hydrometer Analysis

For Material <75µm


Percent Dispersion

(Double Hydrometer)


AS1289 3.6.3, 3.8.2

California Bearing Ratio

AS1289 6.1.1

WA 141.1

For Remoulded Soils


Soaked and Unsoaked CBR

Constant effort or specified density ratio



Particle Density

Standard Method


Fine Fraction (<2.36mm)

Coarse Fraction (>2.36mm)



AS1289 3.5.1

Emerson Class Number


AS1289 3.8.1



Soil dispersion test for Class 1 to 8




Unified Compressive Strength

For Compacted Materials


Constant effort or specified density ratio




WA 143.1

Calcium Carbonate Content


WA 915.1



Percentage soluble in hydrochloric acid



Point Load Index



Point load strength for diametral, axial or irregular samples





Nuclear Density Test



Dry density ratio, moisture variation and moisture ratio with correction for oversized material




AS1289 5.4.1, 5.8.1

Where required, the above tests can be carried out to evaluate the effectiveness of treatment with lime, cement, bitumen or other polymer additives.


While NATA Accreditation has not yet been sought, EMC can carry out various other testing in accordance with the applicable Standards, including:


  •  Shrink / Swell Index (AS1289.7.1.1)
  •  Lime Saturation Point (RC 131.01)
  •  Durability of Road Materials (T133)
  •  Capillary Rise and Absorption (T172)
  •  Oversize PSD (in-house method)


In addition, EMC have proprietary, in-house equipment for assessing the relative erodibility of soils.

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