Tensile and hydraulic properties of geosynthetics after mechanical damage and abrasion laboratory tests

Rosete, A; Lopes, P. Mendonça; Pinho-Lopes, Margarida; Lopes, Maria de Lurdes

doi:10.1680/gein.13.00022

Cited by 29 publications

(32 citation statements)

References 11 publications

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“…For geotextile GTX the permittivity decrease indicated the prevalence of clogging, while the characteristic opening size increase indicated the prevalence of cuts and openings. Rosete et al (2013) found similar trend, which were likely to be a consequence of the different test procedures used in the tests.…”

Section: Permittivity and Characteristic Opening Sizementioning

confidence: 61%

“…The test ends after 750 cycles (1 cycle = 1 double pass); the specimen is removed carefully and subjected to a characterisation test. For geotextile GTX the test setup was slightly changed (Rosete et al, 2013).…”

Section: Laboratory Damagementioning

confidence: 99%

“…Perkins (2007) pointed out the need to make available a larger database of results for other materials, which the present paper also tries to address. Rosete et al (2013) studied the effect of mechanical damage and abrasion damage (in isolation and combined, sequentially) on mechanical and hydraulic properties of six geosynthetics, using index laboratory tests, accompanied by visual inspections. Woven materials with a sheet structure were found more sensitive to damage, particularly due to abrasion.…”

Section: Introductionmentioning

confidence: 99%

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Synergisms between laboratory mechanical and abrasion damage on mechanical and hydraulic properties of geosynthetics

Pinho-Lopes

Lopes

2015

Transportation Geotechnics

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Highlights 11 Laboratory damage tests were performed on a geotextile, a geogrid and a geocomposite. 12 Abrasion damage was the most important mechanism for the tensile response. 13 Mechanical damage was the most important mechanism for the hydraulic properties.14  Positive synergy between mechanical and abrasion damage for the tensile properties. 15 Traditional approach for estimating hydraulic properties is likely unsafe. for the permittivity of the geotextile and the geocomposite, likely due to clogging of their pores. 34For the permittivity and the characteristic opening size of these geosynthetics, negative synergy 35 between mechanical and abrasion damage was found; the traditional approach was found likely 36 to result in unsafe estimates of these properties.

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Section: Permittivity and Characteristic Opening Sizementioning

confidence: 61%

Section: Laboratory Damagementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synergisms between laboratory mechanical and abrasion damage on mechanical and hydraulic properties of geosynthetics

Pinho-Lopes

Lopes

2015

Transportation Geotechnics

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“…Although the three geosynthetics have the same nominal tensile strength, their tensile strength is often higher than the value stated on their technical datasheets. Rosete et al [23] presented tensile strength values for these geosynthetics both undamaged and after laboratory mechanical damage. The mechanical damage induced is likely to affect the tensile response of the geosynthetics more than their interface strength.…”

Section: Influence Of the Geosynthetic Structurementioning

confidence: 99%

Influence of mechanical damage induced in laboratory on the soil-geosynthetic interaction in inclined-plane shear

Pinho-Lopes

Lopes

2018

Construction and Building Materials

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This paper contributes to better understanding how mechanical damage associated with installation affects soil-geosynthetic interaction, particularly for inclined plane shear movement. The mechanical damage was induced in laboratory, adapting a standardised procedure to allow for large samples. Six geosynthetics were studied: two geotextiles, one geocomposite and three geogrids. The soil-geosynthetic interface was characterised using inclined plane shear tests. The laboratory mechanical damage affected the soil-geosynthetic interface strength and the sliding mechanisms observed. The results showed that the mechanical damage caused an increase in the skin friction available, due to the damage mechanisms observed. The structure of the geosynthetic affected the inclined plane shear response after mechanical damage. The friction mobilised in solid area of the geogrids increased after mechanical damage, which depended on the geogrid and on the consequences of mechanical damage. The reduction factors for mechanical damage associated to installation 1 showed that the interface strength did not change significantly. The reduction factor obtained from tensile tests was, in most cases, conservative to represent the changes observed on the soil-geosynthetic interface strength. The structure of the geosynthetics had a higher impact on their tensile response after mechanical damage than on the soil-geosynthetic interface in inclined plane shear. For the interface strength in inclined shear plane movement, the mechanical damage induced in laboratory of the woven geotextile was conservative compared to field installation damage, while for the woven geogrid the mechanical damage induced in laboratory was within the range of damage induced in the field. Despite some heterogeneity of responses, the standardised laboratory tests to induce mechanical damage in laboratory seem to be able to represent the effect of the mechanical damage associated with installation on the inclined plane shear response of soil-geosynthetic interfaces.

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“…Therefore, this work uses the term mechanical damage instead of installation damage. The degradation suffered by the geosynthetics during the field or laboratory damage tests is often evaluated by monitoring changes in their physical, mechanical (e.g., [10][11][12][13][14]), hydraulic (e.g., [15][16][17]), or long-term (e.g., [18,19]) properties. The effect of the installation process on the interface properties between geosynthetics and the contacting soils or aggregates has also been evaluated (e.g., [20,21]).…”

Section: Introductionmentioning

confidence: 99%

Effect of Different Aggregates on the Mechanical Damage Suffered by Geotextiles

2019

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The installation process of geosynthetics can be, in some applications, one of the most relevant degradation mechanisms of these construction materials, affecting their performance and useful lifetime. In this work, three nonwoven geotextiles with different masses per unit area were submitted to mechanical damage under repeated loading tests with corundum and with different natural aggregates. The damage occurred in the geotextiles was evaluated by visual inspection and by monitoring changes in their short-term tensile and puncture behaviors (mechanical properties) and in their water permeability behavior normal to the plane (hydraulic property). The mechanical damage under repeated loading tests provoked relevant changes in the mechanical and hydraulic properties of the geotextiles. These changes depended on the mass per unit area of the geotextiles and on the characteristics of the aggregates. The results enabled the establishment of a correlation between the loss of mechanical strength and the variation of the water permeability normal to the plane of the geotextiles.

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Tensile and hydraulic properties of geosynthetics after mechanical damage and abrasion laboratory tests

Abstract: Abstract:18 Installation damage of geosynthetics occurs during their handling, positioning on the ground

Cited by 29 publications

References 11 publications

Synergisms between laboratory mechanical and abrasion damage on mechanical and hydraulic properties of geosynthetics

Synergisms between laboratory mechanical and abrasion damage on mechanical and hydraulic properties of geosynthetics

Influence of mechanical damage induced in laboratory on the soil-geosynthetic interaction in inclined-plane shear

Effect of Different Aggregates on the Mechanical Damage Suffered by Geotextiles

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