{"id":2157,"date":"2021-04-06T20:06:00","date_gmt":"2021-04-06T20:06:00","guid":{"rendered":"https:\/\/gcttg.com\/information\/librairie\/"},"modified":"2025-07-10T15:45:04","modified_gmt":"2025-07-10T19:45:04","slug":"library","status":"publish","type":"page","link":"https:\/\/gcttg.com\/en\/information\/library\/","title":{"rendered":"Library"},"content":{"rendered":"

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Technical Note \u2013 Assessment of Polyethylene Geomembrane oxidation using ATR FTIR Microscope
\n<\/strong>by Ali Fazli<\/strong>, CTT Group.<\/strong><\/p>\n

English version only.<\/p>\n

CONTEXT<\/strong><\/em><\/p>\n

This technical note describes the technical input given by using micrsocsope ATR_FTIR for investigation of polyethylene geomembrane oxidation.<\/p>\n

To learn more, click here<\/a>.<\/p>\n<\/div>

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\"SAGEOS<\/span><\/div><\/div><\/div>

Lifetime considerations of geotextile UV exposure before installation,
\n<\/strong>by David Beaumier<\/strong>, CTT Group, Stephan Fourmont, Afitex-Texel, George Koerner, Geosynthetic Institute<\/strong><\/p>\n

Presented during the GeoAmericas 2024, Toronto, Ontario, Canana, April 28 \u2013 May 1, 2024<\/strong><\/p>\n

English version only.<\/p>\n

CONTEXT<\/strong><\/em><\/p>\n

Materials for construction projects are subjected to several steps, into which they risk losing critical properties to their functions and usage.<\/p>\n

To learn more, click here<\/a>.<\/p>\n<\/div>

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Evaluation of geomembrane UV exposure using geographic and climate data, by\u00a0<\/strong>Beaumier, David, Eng. M.A.Sc., Fazli, Ali, Ph.D.<\/strong><\/p>\n

Presented during the ATA Geosynthetics, IGS session, February 8, 2023<\/strong><\/p>\n

English version only.<\/p>\n

ABSTRACT<\/strong><\/em><\/p>\n

Several geomembrane applications involve long-term UV exposure conditions: covers, ponds, leach pads, dams, and canals.\u00a0 High-density polyethylene (HDPE) geomembranes are used in most of these applications. In HDPE geomembranes, UV degradation (photodegradation) induced by long-term exposure to UV or visible light results in discoloration, surface cracks, brittleness, and deterioration in mechanical properties. This paper aims to present specific data from weather stations for the evaluation of light intensity with climates. Weather station data, including irradiance, UV index, latitude, longitude, and altitude, are used to calculate the effective irradiance on HDPE geomembranes. In addition, the orientation to sunlight changes the level of radiant energy on the exposed geomembranes. A model using radiant energy is proposed for guidance to service life prediction of exposed geomembranes.<\/p>\n

To learn more, click here<\/a>.<\/p>\n<\/div>

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Smart Textiles Testing: A Roadmap to Standardized Test Methods for Safety and Quality-Control \u00a0(October, 2021)<\/strong><\/em><\/p>\n

Chapter of the book “Textiles for Functional Applications” written by Ikra Iftekhar Shuvo, Justine Decaens, Dominic Lachapelle and Patricia I. Dolez.<\/p>\n

Only english version.<\/p>\n

ABSTRACT<\/strong><\/em><\/p>\n

Test methods for smart or electronic textiles (e-textiles) are critical to ensure product safety and industrial quality control. This paper starts with a review of three key aspects: (i) commercial e-textile products\/technologies, (ii) safety and quality control issues observed or foreseen, and (iii) relevant standards published or in preparation worldwide. A total of twenty-two standards on smart textiles \u2013 by CEN TC 248\/ WG 31, IEC TC 124, ASTM D13.50, and AATCC RA111 technical committees \u2013 were identified; they cover five categories of e-textile applications: electrical, thermal, mechanical, optical, and physical environment. Based on the number of e-textile products currently commercially available and issues in terms of safety, efficiency, and durability, there is a critical need for test methods for thermal applications, as well as to a lesser degree, for energy harvesting and chemical and biological applications. The results of this study can be used as a roadmap for the development of new standardized test methods for safety & quality control of smart textiles.<\/p>\n

To learn more, click here<\/a>.<\/p>\n<\/div>

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Antimicrobial Agents for Textiles: Types, Mechanisms and Analysis Standards (July 2021)<\/strong><\/em><\/p>\n

Chapter of the book “Textiles for Functional Applications” which was written by Ahmad Ibrahim, Joseph-\u00c9mile Laquerre, Patricia Forcier, Vincent Deregnaucourt, Justine Decaens and Olivier Vermeersch.<\/p>\n

ABSTRACT<\/strong><\/em><\/p>\n

The large surface area, and ability to retain moisture of textile structures enable microorganisms\u2019 growth, which causes a range of undesirable effects, not only on the textile itself, but also on the user. Moreover, textiles used in health care environments are required to possess antimicrobial property to minimize spread of pathogenic infection. Anti-microbial property can be imparted via chemical finishing with an antimicrobial agent. Currently the use of antimicrobial agents includes metal compounds (notably copper and silver particle), chitosan, haloge-nated phenols \u201ctriclosan\u201d, quaternary ammonium compounds, antibiotics (a class of antimicrobials produced from microorganisms that act against one another), and N-halamines. The possibility of bacterial resistance limits antibiotic use to specific medical applications, and triclosan is known for being dangerous to the environ-ment and is currently under scrutiny for possible endocrine disrupting to human being. Although quaternary ammonium compounds are stable and easily manufac-tured, microbial resistance is also a concern. Quaternary ammonium compounds (QACs), Polyhexamethylene Biguanide (PHMB), chitosan and N-halamines are listed under bound or non-leaching type antimicrobials. The bulk of current chapter focuses on the different family of antimicrobial agents used for textiles and their mechanisms.<\/p>\n

To learn more, click here<\/a>.<\/p>\n<\/div>

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Advanced Characterization and Testing of Textiles<\/em><\/strong>, co-authored by Patricia Dolez, Olivier Vermeersch and Val\u00e9rio Izquierdo (CTT Group), provides a comprehensive overview of physical and chemical testing of textiles. By presenting the main principles of characterization and advanced testing, this book goes to the heart of the testing methods specific to each textile property and proves to be a valuable tool for research and development managers in the textile industry, or for students or researchers in textile science.<\/p>\n

To learn more, click here<\/a>.<\/p>\n<\/div>

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Long-Term Performance of HDPE Geomembranes Exposed to High Service Temperature, <\/em><\/strong>a study by Andrew Mills and David Beaumier (CTT Group) published in the journal Geotechnical Frontiers 2017<\/em> looks at the performance of a high-temperature resistant geomembrane evaluated over a one-year period, and compared to the performance of ordinary geomembranes.<\/p>\n

To learn more, click here<\/a>.<\/p>\n<\/div>

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Laboratory Measurement of the Linear Thermal Expansion of Geomembranes Using a Dynamic Mechanical Analyzer (DMA)<\/em><\/strong><\/p>\n

If you have any questions about this conference, please contact us.<\/em><\/strong><\/small><\/p>\n

David Beaumier, Patricia Dolez, and Eric Blond, SAGEOS\/CTT Group Thermal expansion is a critical property of geomembranes as it can affect the formation of wrinkles during their installation as well as for exposed applications. When an excessive number of wrinkles has developed because of an excessive dilatation of the geomembrane, these wrinkles may become interconnected, which increases the risk and extent of leakage. This paper introduces the test procedure that should be followed to permit the evaluation of thermal expansion characteristics of geomembranes using a Dynamic Mechanical Analyzer. It is shown that the test should be conducted with low applied stress and very low heating rate. In addition, the effect of the specimen width and length is analyzed. Finally, differences in behavior between machine and cross direction are characterized. Overall, it is concluded that this technique provides an effective tool for measuring the linear thermal expansion of geomembranes under conditions simulating their use in the field.<\/p>\n

Geosynthetics Research & Modeling 2<\/a><\/p>\n<\/div>

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Stress-Cracking Resistance of a Bi-modal PE-RT HDPE Geomembrane<\/strong><\/p>\n

If you want to know more, contact us.<\/small><\/strong><\/p>\n

Rohit Sati, M.Sc, Layfield Group, 17720 – 129 Avenue NW, Edmonton, Alberta, Canada; e-mail: rsati@layfieldgroup.com<\/p>\n

David Beaumier, Eng., M.Sc.A., CTT Group Sageos, 3000, avenue Boull\u00e9, St-Hyacinthe, Quebec, Canada; dbeaumier@gcttg.com<\/p>\n

Abstract : Stress crack resistance (SCR) of high-density polyethylene (HDPE) geomembranes, with densities higher than 0.94 g\/cc, has been widely researched and documented. Over the years, PE resin technology has evolved and has helped to improve many long-term performance properties including SCR. In this study, resistance to stress-cracking of bi-modal polyethylene raised temperature (PE-RT) HDPE was assessed and compared to HDPE and LLDPE geomembranes over a load range from 28 to 60% of yield stress. The higher tensile resistance of this specific bimodal resin resulted in higher resistance in the ductile failure mode than standard HDPE, but moreover, its stress-cracking resistance behavior was found without any clear transition of the failure envelope from a ductile to a brittle behavior. This observation suggests a longer projected lifespan of this unique bi-modal PE compared to existing geomembranes developed using unimodal resins. Previous studies on this material have analyzed tensile, antioxidant depletion, and resistance to brine and chlorine at elevated temperatures. In all cases, an improvement in durability was demonstrated. This study on stress cracking provides a comprehensive understanding of all known key mechanisms contributing to bi-modal PE geomembrane durability.<\/p>\n

Presented at Geosynthetics Conference 2021, Industrial Fabric Association International (IFAI)<\/p>\n<\/div>

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Analysis of smart textiles potential application in occupational health and safety<\/strong> – scientific report produced by CTT Group in 2018 for the pour the Institut de recherche Robert-Sauv\u00e9 en sant\u00e9 et en s\u00e9curit\u00e9 du travail (IRSST)<\/p>\n

To learn more,\u00a0click here<\/a>.<\/p>\n<\/div>

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Links to regulatory resources:<\/strong><\/p>\n

Canadian Textile Flammability Regulations<\/a><\/p>\n

Canadian Textile Labelling Regulations<\/a><\/p>\n<\/div><\/div><\/div><\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":2102,"menu_order":4,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2157","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/gcttg.com\/en\/wp-json\/wp\/v2\/pages\/2157","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gcttg.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/gcttg.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/gcttg.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gcttg.com\/en\/wp-json\/wp\/v2\/comments?post=2157"}],"version-history":[{"count":2,"href":"https:\/\/gcttg.com\/en\/wp-json\/wp\/v2\/pages\/2157\/revisions"}],"predecessor-version":[{"id":20061,"href":"https:\/\/gcttg.com\/en\/wp-json\/wp\/v2\/pages\/2157\/revisions\/20061"}],"up":[{"embeddable":true,"href":"https:\/\/gcttg.com\/en\/wp-json\/wp\/v2\/pages\/2102"}],"wp:attachment":[{"href":"https:\/\/gcttg.com\/en\/wp-json\/wp\/v2\/media?parent=2157"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}