Lab Services: Soil testing

Lab Services: Soil testing

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Test Method Title

Standard Test Method for Dispersive Characteristics of Clay Soil by Double Hydrometer

Reference Number

ASTM D4221

Material

Soil

Test Property

Percent Dispersion

Description of Test

The percent passing the 5-µm size is determined using test procedures in Test Method D422. The percent passing the 5-µm size is determined using the test procedures in this test method. This test method differs from Test Method D422 primarily in that no mechanical agitation nor chemical dispersants are used. The percent dispersion is calculated by dividing the percent passing the 5-µm size using this test method by the percent passing the 5-µm size obtained using Test Method D422 and by multiplying the result by 100.

Preferred Test Sample Size

1 drillers jar

Number of Test Specimens

2

Test Specimen Size

Material passing #10 sieve of 115 grams for sandy soil and 65 grams for silt and clay soil

Keywords

Clays, deflocculation, dispersion, dispersion clay, erosion, hydrometer analysis, jugging, particle size, piping.

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224.676.1371


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212.566.6630



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