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Lab Services: Soil testing

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Test Method Title

Standard Method of Test for Determining the Plastic Limit and Plasticity Index of Soils

Reference Number

AASHTO T 90

Material

Soil

Test Property

Plastic Limit

Description of Test

The Plastic Limit of a soil is the lowest water content at which the soil remains plastic. Soil is rolled into a 3 mm diameter thread at a rate of 80-90 strokes per minute on a glass plate. It is then broken into 6-8 pieces, squeezed together and re-rolled until the soil can no longer be rolled into a thread. At this time, the moisture content of the crumbled pieces are measured.

Preferred Test Sample Size

1 drillers jar

Number of Test Specimens

2

Test Specimen Size

15 grams of material passing the #40 sieve, total

Keywords

Plastic Limit, Atterberg Limits, Limits

For more information, contact GeoTesting Express:



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770.645.6575


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978.635.0424


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224.676.1371


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212.566.6630



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