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Lab Services: Geosynthetic testing

Lab Services: Geosynthetic testing

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Test Method Title

Standard Test Method for Hydraulic Conductivity Ratio (HCR) Testing of Soil/Geotextile Systems

Reference Number

ASTM D5567


Soil-Geosynthetic Interaction

Test Property

Hydraulic conductivity ratio

Description of Test

This test method presents a procedure for performing permeability tests of soil/geotextile systems. The technique requires placement of the soil and geotextile in a flexible-wall permeameter. The soil/geotextile specimen is saturated using de-aired water and back pressure techniques. The specimen is consolidated at the effective stress anticipated in the proposed application. The sample is then permeated with water. The hydraulic conductivity of the soil/geotextile specimen is measured and plotted as a function of elapsed time and volume of water passing through the sample. The hydraulic conductivity may either increase or decrease during the test, depending on the behavior of the geotextile filter. The test is terminated when a stabilized hydraulic conductivity decreases below the minimum value allowed by the drainage design.

Preferred Test Sample Size

Number of Test Specimens


Test Specimen Size

geosynthetic - 4" diameter soil - 4" diameter x 4" high


hydraulic conductivity ratio, HCR, clogging

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