An Assessment of Mechanical Properties of Geo-Grid Reinforced Material and its Applicability

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Geo-composites are generally made by hybridizing of some components among geo-textile, geo-grid, geo-membrane, geo-net, and other materials. Due to practical applicability of geotechnical structures, the demand of geo-composites, especially for drainage application, has gradually increased. In the present study, the geo-composites bonded with geo-grid in chemical process were investigated experimentally in terms of strain evaluation and creep response values. Geo-grid plays an important role as a reinforcing material. Three kinds of geo-grid were prepared as strong yarn polyester and they were woven type, non-woven type, and wrap knitted type. The sample geo-grids were then coated with PVC. The rib tensile strength tests were conducted to evaluate geo-grid products in terms of tensile strength with regard to single rib. The test was performed according to GRI-GGI. The test results revealed that the tensile strains at the maximum tensile strength showed very good tensile deformation characteristics in the range of 10.0-13.0% in terms of mono-rib performance. Any significant trends have not found between warp knitted and woven type geo-grid in terms of the tensile strength ratios. Further experimental analysis has been conducted to investigate the wide-width strip tensile strength, contact point strength and creep features of the geo-grid samples used in this study. It was concluded again from the experiments that the tensile and creep strains of the geo-grid showed so stable values that the geo-grid prepared in this study could protect geo-textile partially in practical structure.

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Periodical:

Materials Science Forum (Volumes 539-543)

Main Theme:

Edited by:

T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran

Pages:

979-982

Citation:

B. B. Hwang et al., "An Assessment of Mechanical Properties of Geo-Grid Reinforced Material and its Applicability", Materials Science Forum, Vols. 539-543, pp. 979-982, 2007

Online since:

March 2007

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$38.00

[1] A. Gazdaru, L. Kellner and V. Feodorov: Geosinteticele in constructii Vol. 1 (Ed. Inedit, Bucharest 1992).

[2] A. Gazdaru, S. Manea, V. Feodorov and V. Batali: Geosinteticele in constructii, Proprietati, elemente de calcul (Ed. Academiei, Bucharest 1999).

[3] S. Manea, V. Feodorov and D. Sofrone: Proceding of 3rd Int. Congress on Environmental Geotechnics, Lisbon (1998).

[4] GRI: GGI Test Methods GG1 Geogrid Rib Tensile Strength (Drexel University, Philadelphia, PA 1995).

[5] ASTM: D 4595 Test Method for Tensile Properties of Geotextile by the Wide-Width Strip Method (ASTM Standard on Geosynthetics, West Conshohocken), p.38.

[6] GRI: GGI Test Methods GG2 Geogrid Junction Strength (Drexel University, Philadelphia, PA 1995).

[2] [4] [6] [8] [10] [12] [14] 01234 Time (hour) Strain (%) T 60% loadultGG1 GG2 GG3 100 1000 10000 100000 Fig. 6 Time-creep strain curve of geo-grid.

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