BRANDON MANITOBA CA
BRANDON MANITOBA
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Laboratory in Brandon Manitoba

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The clay soils of the Assiniboine River delta in Brandon Manitoba are highly plastic. Liquid limits here often exceed 60%, and plasticity indices can reach 40. These values directly control how the soil behaves under load and moisture change. We run Atterberg limits tests per CSA A23.2-2A on every sample we take. The results feed directly into the USCS classification, which then guides foundation design. For projects on these expansive clays, we combine Atterberg data with a ensayo de consolidación to forecast long-term settlement, and we use ensayos de permeabilidad en laboratorio to assess drainage rates in the clay layers. This integrated approach gives contractors in Brandon Manitoba a complete picture before they pour a single cubic metre of concrete.

Illustrative image of Limites atterberg in Brandon Manitoba
Liquid limits above 60% in Brandon Manitoba clays mean high shrink-swell potential. Ignore the Atterberg numbers and your foundation will move. Period.

Our service areas

Methodology and scope

Brandon Manitoba grew rapidly in the 1950s and 1960s, with subdivisions spreading onto the lacustrine clays left by glacial Lake Agassiz. Those clays have a complex stress history. Many homes built in that era now show differential movement because Atterberg limits were not measured. We see it every year. Our team extracts undisturbed tube samples and runs the full Atterberg suite: liquid limit (Casagrande cup), plastic limit, and shrinkage limit. We report the plasticity index and the liquidity index. These numbers tell us whether a soil will swell, shrink, or remain stable under the seasonal moisture cycles typical of southwestern Manitoba. The testing follows CSA A23.2-2A strictly, and we document every step for the geotechnical report that Brandon Manitoba engineers rely on.
Technical reference — Brandon Manitoba

Local considerations

We saw a commercial strip mall in Brandon Manitoba crack three years after construction. The Atterberg limits had not been tested. The clay had a plasticity index of 38 and a liquid limit of 68. Seasonal moisture changes caused the slab to heave 50 mm. The owner paid CA$120,000 for underpinning. That is the real cost of skipping Atterberg limits. In Brandon Manitoba, the clay profile is thick and variable. One borehole may show low plasticity; another 20 metres away shows high plasticity. You need enough tests to map the variability. Without the plasticity index, you cannot estimate the swelling pressure. Without the swelling pressure, you cannot design an adequate foundation.

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Applicable standards

CSA A23.2-2A-17e1, CSA A23.3-19 (clay-related provisions), NBCC 2020 Division B, Part 4

Technical parameters

ParameterTypical value
Liquid Limit (LL)45% – 75%
Plastic Limit (PL)18% – 28%
Plasticity Index (PI)25 – 45
Shrinkage Limit (SL)10% – 15%
Liquidity Index (LI)0.1 – 0.4
Sample PreparationWet sieving #40, air-dried

Frequently asked questions

Why are Atterberg limits important for clay soils in Brandon Manitoba?

The clays in Brandon Manitoba are lacustrine deposits from glacial Lake Agassiz. They have high plasticity and are prone to volume change with moisture. Atterberg limits quantify that behaviour. Without them, you cannot predict heave or settlement, and foundation designs become guesswork.

What is the difference between liquid limit and plastic limit?

The liquid limit is the moisture content at which soil changes from plastic to liquid. The plastic limit is the moisture content at which soil changes from semi-solid to plastic. The difference between them is the plasticity index. A high PI means the soil is very sensitive to moisture changes.

How much does Atterberg limits testing cost in Brandon Manitoba?

The typical range for a full Atterberg suite (LL, PL, SL, PI) is CA$90 to CA$140 per sample. This includes sample preparation and reporting. Volume discounts apply for projects with 10 or more samples. The exact cost depends on the number of points needed for the liquid limit curve.

Can Atterberg limits be used to identify expansive soils?

Yes. Soils with a plasticity index above 30 and a liquid limit above 50 are generally considered expansive. In Brandon Manitoba, that covers most of the clay deposits. The plasticity index is a direct input to the swelling pressure estimation methods used in foundation design.

What standard governs Atterberg limits testing in Canada?

CSA A23.2-2A is the standard method used across Canada. It covers the Casagrande cup procedure for liquid limit and the thread-rolling method for plastic limit. The results are reported as percentages and used in the Unified Soil Classification System (USCS) per CFEM (Canadian Foundation Engineering Manual).

Location and service area

We serve projects across Brandon Manitoba.

Location and service area