STS – Soil Testing Services


STS is a NATA registered laboratory that undertakes a comprehensive range of earthworks, pavement material, rock and soil testing services. Our in house testing laboratory means that laboratory test results can be provided with a fast turnaround for both STS clients and JK Group geotechnical engineers. STS geotechnicians undertake testing in the STS laboratory in Macquarie Park or onsite.

Soil testing

Typical soil testing includes Moisture Content, Atterberg Limits, Linear Shrinkage, Shrink-Swell Instability Index, Emerson Class Number, California Bearing Ratio (CBR), Particle Size Distribution, Compaction, Consolidation, Permeability, and Shear Box testing.


Rock Testing

Typical rock testing includes, Point Load Strength Index and Unconfined Compressive Strength (UCS) testing.

Earthworks Testing

STS can provide earthworks control testing for commercial, industrial and infrastructure developments. Our earthworks testing capabilities include Level 1 and Level 2 control testing in accordance with AS3798.


Pavement Testing

Typical pavement testing includes bitumen content testing, aggregate grading, stability, density and voids content. Granular pavement testing including wet and dry strength, Modified Texas Triaxial, grading, Plasticity Index (PI) and particle shape.

Get in Touch

For more information about the range of testing services STS provides, contact David Treweek on (02) 9888 5000 or enquire online.