Geotechnical investigation in Bendigo must account for the region’s complex Palaeozoic bedrock, deep weathering profiles, and reactive clay soils that can vary sharply across short distances. Our site assessments begin with targeted in-situ testing to evaluate bearing capacity, settlement potential, and groundwater conditions in line with AS 1726. For shallow profiling we often deploy an exploratory test pit to visually log fill and natural strata, while deeper stratigraphy and drained strength parameters are reliably obtained with a cone penetration test (CPT).
Residential slabs, commercial footings, and rural infrastructure in the Greater Bendigo area all demand this level of investigation to mitigate shrink-swell risk and ensure compliance with the National Construction Code. Where cohesive layers or gravels require disturbance sampling for laboratory index testing, we complement CPT data with the standard penetration test (SPT), delivering a complete subsurface model for confident foundation design.
Full determination per AS 1289.3.1.1 and 3.2.1. Includes liquid limit by Casagrande cup, plastic limit by thread rolling, and calculated plasticity index. Suitable for all fine-grained soils in Bendigo.
Measures the shrinkage of a soil bar when dried from its liquid limit condition. Essential for predicting ground movement in reactive clays common in the region.
Atterberg results plus full USCS classification (including grain size distribution and organic content). Delivers a complete soil identity for foundation design.
If initial results show borderline plasticity or field conditions change, we re-run Atterberg limits on fresh samples to confirm consistency before final design decisions.
AS 1289.3.1.1 – Determination of liquid limit (Casagrande method), AS 1289.3.2.1 – Determination of plastic limit, AS 1289.3.1.1 – Standard test methods for liquid limit, plastic limit, and plasticity index of soils
The typical range for a standard Atterberg limits test (LL, PL, PI) is AU$80 – AU$180 per sample. This can vary depending on the number of samples, required turnaround time, and whether additional classification tests are bundled.
Bendigo's soils range from low-plasticity sands near the hills to highly expansive clays in the floodplain. Atterberg limits are the only way to quantify plasticity and predict shrink-swell behaviour. Without this test, foundation design for reactive soils is guesswork.
Yes. The plasticity index directly influences subgrade stiffness and susceptibility to moisture changes. In road design, Atterberg results help select stabilisation additives (lime, cement) and are often combined with CBR testing to set design subgrade values.