Standard Test Method for Accelerated Tensile Creep and Creep-Rupture of Geosynthetic Materials Based on Time-Temperature Superposition Using the Stepped Isothermal Method

Importancia y uso:

5.1 Use of the Stepped Isothermal Method decreases the time required for creep to occur and the obtaining of the associated data.

5.2 The statements set forth in 1.6 are very important in the context of significance and use, as well as scope of the standard.

5.3 Creep test data are used to calculate the creep modulus of materials as a function of time. These data are then used to predict the long-term creep deformation expected of geosynthetics used in reinforcement applications.

Note 1: Currently, SIM testing has focused mainly on woven and knitted geogrids and woven geotextiles made from polyester, aramid, polyaramid, poly-vinyl alcohol (PVA), and polypropylene yarns and narrow strips. Additional correlation studies on other materials are needed.

5.4 Creep-rupture test data are used to develop a regression line relating creep stress to rupture time. These results predict the long-term rupture strength expected for geosynthetics in reinforcement applications.

5.5 Tensile testing is used to establish the ultimate tensile strength (T_ULT) of a material and to determine elastic stress, strain, and variations thereof for SIM tests.

5.6 Ramp and Hold (R+H) testing is done to establish the range of creep strains experienced in the brief period of very rapid response following the peak of the load ramp.

Subcomité:

D35.02

Referida por:

F2418-23, F3430-20, F2881_F2881M-21E01, F2764_F2764M-24, D8105-18, F2947_F2947M-21A, D5819-22, F2922-13R18, D8269-21, F2787-13R18

Volúmen:

04.13

Número ICS:

59.080.70 (Geotextiles)

Palabras clave:

creep; creep-rupture; geosynthetics; ramp and hold test; rapid loading tensile test; stepped isothermal method; time-temperature superposition;