Degradation of polypropylene woven geotextile: tensile creep and weathering

Guimarães, M. G. A.; Vidal, Delma de Mattos; Urashima, Denise de Carvalho; Castro, Carlos Alberto Carvalho

doi:10.1680/jgein.16.00029

Cited by 24 publications

(12 citation statements)

References 25 publications

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“…The field method is restricted to the specific conditions of the site, and its duration can be quite long. Laboratory accelerated aging tests represent the boundary conditions from field applications and they can be required to understand the behavior of the material facing the oxidative exposition [ 7 , 9 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

“…A wide set of evaluations and tests were performed, including scanning electron microscopy, thermal analyses, kinetic evaluation from degradation, and mechanical tests. Previous studies have focused mainly on the effects of aging on the mechanical properties of the geotextile material, in a macro-scale approach, with little or no emphasis on the influence of UV-radiation in its thermal characteristics [ 4 , 5 , 12 , 15 , 16 ]. Therefore, this paper aims to contribute to deepening the learning on the effects of UV-radiation on the durability of geosynthetics, both in macro and micro-scale perspectives.…”

Section: Introductionmentioning

confidence: 99%

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Study of the Ultraviolet Effect and Thermal Analysis on Polypropylene Nonwoven Geotextile

et al. 2021

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The use of polymeric materials such as geosynthetics in infrastructure works has been increasing over the last decades, as they bring down costs and provide long-term benefits. However, the aging of polymers raises the question of its long-term durability and for this reason researchers have been studying a sort of techniques to search for the required renewal time. This paper examined a commercial polypropylene (PP) nonwoven geotextile before and after 500 h and 1000 h exposure to ultraviolet (UV) light by performing laboratory accelerated ultraviolet-aging tests. The state of the polymeric material after UV exposure was studied through a wide set of tests, including mechanical and physical tests and thermoanalytical tests and scanning electron microscopy analysis. The calorimetric evaluations (DSC) showed distinct behaviors in sample melting points, attributed to the UV radiation effect on the aged samples. Furthermore, after exposure, the samples presented low thermal stability in the thermomechanical analysis (TMA), with a continuing decrease in their thicknesses. The tensile tests showed an increase in material stiffness after exposition. This study demonstrates that UV aging has effects on the properties of the polypropylene polymer.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study of the Ultraviolet Effect and Thermal Analysis on Polypropylene Nonwoven Geotextile

et al. 2021

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“…These methods analyze the synergy of the exposure of geosynthetics to more than one degradation mechanism. There are numerous combinations of degradation mechanisms and some examples of this research include studies with thermal oxidation and ultraviolet radiation [4,5,32], natural exposure and immersion in acids at different temperatures [33,34], with creep and natural exposure [27], installation damage [17] or immersion in acid and base solutions [35].…”

Section: Non-conventional Conventionalmentioning

confidence: 99%

“…In another example, as reported by Koerner et al [20], the addition of a second geosynthetic layer for protection is a viable solution for materials without ultraviolet radiation protection. Thus, important variables in the design of geosynthetic tubular structures for river and coastal protection conditions, such as exposure to radiation and perforation, make clear the need for analyses that involve, for example, saturation-drying cycles in the exposed environment [21][22][23], as well as the analysis of creep deformations [15,[24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

A Non-conventional Durability Test for Simulating Creep of Geosynthetics Under Accelerated Degradation

Filho

Maia

2021

Int. J. of Geosynth. and Ground Eng.

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The evaluation of the durability of geosynthetics for application in real structures is an important field of investigation. Within this field, the interaction between degradation agents that geosynthetics can be subject to, in their different applications, is an increasingly studied issue, because it can have direct implications in the design of the materials. Thus, this article explores a non-conventional test for geosynthetics, to simulate creep under accelerated conditions using a saturation and drying procedure simultaneous to the creep process. In this way, the material is closer to the exogenous field conditions as in, for example, riverside projects or even in coastal protection. For this, a total of 48 tests of conventional creep and under accelerated degradation conditions were carried out in 4 different geotextiles. From these tests, models were proposed and presented coefficients of determination greater than 0.84. Additional results indicate an increased strain rate ranging between 5 and 16 times in creep test from the moment that degradation simultaneous with creep is induced. Reduction factors greater than 3 indicated a very aggressive degradation process. In general, the study showed that ensuring the design life of geosynthetics calls for a simulation of degradation conditions that demand more from these materials. By enabling a more precise analysis of field conditions the creep test under accelerated conditions presents an excellent tool for project design. The significance of this study for geosynthetics design is in providing general knowledge of creep under accelerated conditions using equations and models to determine important geosynthetic parameters.

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“…Most of the past studies were mainly focus on investigating the creep behavior of geotextiles or geomembrane, [26][27][28][29][30] and the interface mechanism between sand and geogrid. [31][32][33] To simulate the deterioration of mechanical properties of geogrid with the increasing loading time, many constitutive models and creep test method were developed under nonconstraint condition, 22,[34][35][36][37][38][39][40][41][42] which provides a basis for the study of creep characteristics of geosynthetics.…”

Section: Introductionmentioning

confidence: 99%

Study on creep characteristics of geogrids considered sand-geosynthetics interaction under different loading levels

Wang

Lin

et al. 2020

Journal of Engineered Fibers and Fabrics

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Only considered creep behavior of geosynthetics in the design and construction of reinforced structures, not that the creep behavior of reinforced materials considered geosynthetics-sand interaction under different loading levels. A series of creep tests on a geogrid under different loading levels were carried out through a self-developed test device. The long-term creep characteristics of the geogrids under different loading levels were analyzed. The results showed that: Compared to sand constraint condition, under the same loading level, the creep rate under non-constraint condition is about 1.1 times. After the creep time over 400 h, the strain growth rate tends to be a constant value for sand constraint condition, which needs 700 h for non-constraint condition. Creep deformation mainly occurs near the pullout endpoint of the geogrid, and the deformation of each strain measurement zone is reduced from the tensile end to the fixed end of the geogrid.

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Degradation of polypropylene woven geotextile: tensile creep and weathering

Cited by 24 publications

References 25 publications

Study of the Ultraviolet Effect and Thermal Analysis on Polypropylene Nonwoven Geotextile

Study of the Ultraviolet Effect and Thermal Analysis on Polypropylene Nonwoven Geotextile

A Non-conventional Durability Test for Simulating Creep of Geosynthetics Under Accelerated Degradation

Study on creep characteristics of geogrids considered sand-geosynthetics interaction under different loading levels

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