Standard Test Method for Determining the (In-Plane) Hydraulic Transmissivity of a Geosynthetic by Radial Flow

Importancia y uso:

5.1 This test method is an index test to estimate and compare the in-plane hydraulic transmissivity of one or several candidate geosynthetics under specific gradient and stress conditions.

5.2 This test method may be used for acceptance testing of commercial shipments of geosynthetics, but caution is advised since information about between-laboratory precision is incomplete. Comparative tests as directed in 5.2.1 are advisable.

5.2.1 In case of a dispute arising from differences in reported test results when using this procedure for acceptance of commercial shipments, the purchaser and the supplier should first confirm that the tests have been conducted using comparable test parameters including specimen conditioning, normal stress, hydraulic system gradient, etc. Comparative tests then should be conducted to determine if there is a statistical bias between their laboratories. Competent statistical assistance is recommended for the investigation of bias. As a minimum, the two parties should take a group of test specimens that are as homogeneous as possible and that are formed from a lot of the material in question. The test specimens should be assigned randomly to each laboratory for testing. The average results from the two laboratories should be compared using the Student's t-test for unpaired data and an acceptable probability level chosen by the two parties before testing is begun. If bias is found, either its cause must be found and corrected or the purchaser and supplier must agree to interpret future test results in light of the known bias.

Subcomité:

D35.03

Referida por:

D4716_D4716M-22

Volúmen:

04.13

Número ICS:

59.080.70 (Geotextiles)

Palabras clave:

geosynthetics; hydraulic transmissivity; index tests; in-plane flows; radial transmissivity;