New equipment to conduct confined-accelerated creep tests on geosynthetics

F.A.N. Franca, B.S. Bueno, J.G. Zornberg

In the proceedings of: GEO2011: 64th Canadian Geotechnical Conference, 14th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, 5th Pan-American Conference on Teaching and Learning of Geotechnical Engineering

Session: Laboratory Testing

ABSTRACT: Creep behavior of geosynthetics is commonly quantified by standard tests conducted using in-isolation specimens. These tests are time-consuming and may not consider the effect of soil confinement. Both concerns have been addressed in the technical literature, but only independently. This paper presents a new device to perform simultaneously confined and accelerated creep tests on geosynthetics. The results of creep tests conducted using both a nonwoven and a woven geotextiles are presented. As expected, creep strains were found to be dependent on the test temperature in both in-isolation and in-soil conditions. On the other hand, the creep behavior of only the nonwoven geotextile was found to be sensitive to soil confinement. Soil confinement was found to have an insignificant effect on the woven geotextile creep response. PRESENTACIONES TÉCNICAS El comportamiento de fluencia de geosintéticos es comúnmente cuantificado por las pruebas estándar realizadas con muestras en forma aislada. Estas pruebas requieren mucho tiempo y no se puede considerar el efecto de confinamiento del suelo. Ambos aspectos han sido abordados en la literatura técnica, pero sólo de forma independiente. En este estudio se presenta un nuevo dispositivo para realizar ensayos simultáneamente confinados y acelerados de fluencia en geosintéticos. Los ensayos de fluencia fueron realizados con un geotextil no tejido y un geotextil tejido. Como era de esperar, las deformaciones por fluencia son dependientes de la temperatura de ensayo, tanto en la condicione de aislamiento y en la condicione en el suelo. Por otro lado, el comportamiento de fluencia de sólo el geotextil no tejido se encontró que era sensible al confinamiento del suelo. El confinamiento del suelo se encontró que tenía un efecto insignificante sobre la respuesta de fluencia geotextil tejido.

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Cite this article:
F.A.N. Franca; B.S. Bueno; J.G. Zornberg (2011) New equipment to conduct confined-accelerated creep tests on geosynthetics in GEO2011. Ottawa, Ontario: Canadian Geotechnical Society.

@article{GEO11Paper1108,author = F.A.N. Franca; B.S. Bueno; J.G. Zornberg ,title = New equipment to conduct confined-accelerated creep tests on geosynthetics ,year = 2011}