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ASTM D6706 Geogrid Pullout Test for Measuring Geosynthetic Pullout Resistance in Soil

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ASTM D6706 Geosynthetic Pullout Test for Measuring Geosynthetic Pullout Resistance in Soil


A geosynthetic material is placed between two layers of soil. A normal load is applied to the setup. The geosynthetic is clamped on one end and pulled out of the soil. The force required to pull the geosynthetic is recorded. Pullout resistance is calculated by dividing the maximum load by the specimen width. A plot of maximum pullout resistance versus applied normal stress is produced when multiple tests are performed at multiple normal loads.


Test principle

The principle of the direct shear test is to place the sample in a shear test frame, apply two parallel horizontal forces above and below, so that the sample undergoes shear failure in a direction perpendicular to the horizontal plane, and calculate the shear strength of the sample based on the stress-strain curve obtained in the experiment. 


Related standard: 

ISO 12957.1 Geosynthetics — Determination of friction characteristics

ASTM D5321 Standard Test Method for Determining the Shear Strength of Soil-Geosynthetic and Geosynthetic-Geosynthetic Interfaces by Direct Shear

GB/T 17635.1 Geotextiles and geotextile-related products-Determination of friction characteristics-Part 1: Direct shear test

JTG E50 T1129 Direct shear friction characteristics test

SL/T 235 Code for Test and Measurement of Geosynthetics

JTG E50 T1130 Pull-out friction test 

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