Current and Future Practices for the Testing of Multi-component Geosynthetic Clay Liners PDF Download
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Author: Kent von Maubeuge
Publisher: ASTM International
ISBN: 9780803175488
Category : Clay
Languages : en
Pages : 154
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Book Description
"Peer-reviewed papers that were presented at a symposium held June 29, 2012 in San Diego, CA"
Author: Kent von Maubeuge
Publisher: ASTM International
ISBN: 9780803175488
Category : Clay
Languages : en
Pages : 154
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Book Description
"Peer-reviewed papers that were presented at a symposium held June 29, 2012 in San Diego, CA"
Author: Giovanni Biondi
Publisher: CRC Press
ISBN: 1003813852
Category : Technology & Engineering
Languages : en
Pages : 2826
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Book Description
This volume contains the proceedings of the 12th International Conference on Geosynthetics (12 ICG), held in Roma, Italy, 17-21 September 2023. About 750 Authors - Academics, Researchers, Students, Practitioners, Contractors and Manufacturers – contributed to the peer-reviewed papers of this volume, which includes the Giroud lecture, the Bathurst lecture, the Rowe lecture, four keynote lectures and 296 technical papers. The content of these proceedings illustrates the sustainable use of geosynthetics in a variety of innovative as well as consolidated applications. After the sustainability implications in the correct use of geosynthetics, the ability to overcome the natural events effects, often related to the climate change, and to adequately afford the human activities (as the increase of pollution) forced to refer to a new keyword: Resiliency. The 12 ICG intends to become the base for the next step, hence the conference theme is 'Geosynthetics, Leading the Way to a Resilient Planet'. The conference topics, through general and parallel sessions, invited presentations and keynote lectures, address the most recent developments in geosynthetic engineering, and stimulate fruitful technical and scientific interaction among academicians, professionals, manufacturers, students. The 12 ICG proceedings contain a wealth of information that could be useful for researchers, practitioners and all those working in the broad, innovative and dynamic field of geosynthetics.
Author: Kent P. von Maubeuge
Publisher:
ISBN:
Category : Coating barrier
Languages : en
Pages : 11
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Book Description
Multi-component geosynthetic clay liners (GCLs) are a new variation of GCLs or GBR-Cs (Geosynthethic Clay Barriers--CEN and ISO definition) and are fast growing in the current sealing applications. During the manufacturing process, the "classic" geosynthetic clay liners are combined with either an adhered film, coating, or membrane that can decrease the hydraulic conductivity of the product but can also add other features. ASTM D5887 [2009, "Standard Test Method for Measurement of Index Flux through Saturated Geosynthetic Clay Liner Specimens Using a Flexible Wall Permeameter," Annual Book of ASTM Standards, ASTM International, West Conshohocken, PA] is the standard test method for hydraulic testing/testing the index flux through saturated geosynthetic clay liner specimens using a flexible wall permeameter. It gives guidance for testing procedures and apparatus but it is noted in the standard that it may not be applicable to GCL products with geomembrane backing(s). In this paper, results will be shown of the testing of the different multi-component geosynthetic clay liners using exactly the ASTM D5887 procedure. Further modifications will be discussed to allow testing according to this method and suggestions for a new method will be presented.
Author: Robert Koerner
Publisher: Woodhead Publishing
ISBN: 0081002343
Category : Technology & Engineering
Languages : en
Pages : 644
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Book Description
Geotextiles: From Design to Applications presents valuable information on the high performance fabrics used in soil separation, drainage, filtration, reinforcement, and cushioning. These polymeric materials offer solutions for geoengineering and other civil engineering specialties due to their advanced physical, mechanical, hydraulic, and endurance properties. This important book offers comprehensive coverage of the manufacture, functions, properties, designs, and applications of geotextiles. Part One begins with a chapter on the history of geotextiles, followed by chapters giving detailed reviews of the types of fabrics and their manufacturing processes, from resin type, to fiber extrusion, to textile fabrication. Part Two covers the properties, behavior, and testing of geotextiles, with Part Three focusing on applications dealing with the specific primary functions of geotextiles. In Part Four, chapters offer numerous general applications of geotextiles, including those in waste containment, marine engineering, walls/slopes, agriculture, and erosion control. Finally, the chapters of Part Five address quality control and assurance for geotextiles, and the increasingly important topic of sustainability. - Reviews the types of fabrics used for geotextiles and their manufacturing processes - Covers the properties, behavior, and testing of geotextiles - Contains detailed discussions of the primary functions of geotextiles and their wide range of applications
Author: Robert E. Mackey
Publisher: ASTM International
ISBN: 0803134843
Category : Clay
Languages : en
Pages : 161
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Book Description
Soon after the inception of ASTM D35.04 Subcommittee on Geosynthetic Clay Liners, the first symposium on Testing and Acceptance Criteria for Geosynthetic Clay Liners (GCLs), STP 1308, was held on 29 January 1996, in Atlanta, Georgia. The intention of the symposium was to bring together the current knowledge and understanding regarding this relatively new product used in containment systems. Since that symposium, numerous GCL standards have been developed along with a greater appreciation of the product's capabilities and limitations. ASTM D35 determined it was time to assess the current state of GCL technology to better address possible revisions of the present ASTM GCL standards and determine what new standards will be required in the future.
Author: K. P. von Maubeuge
Publisher:
ISBN:
Category : Advective flow
Languages : en
Pages : 15
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Book Description
Three different multicomponent geosynthetic clay liners (GCLs) from different manufacturers are tested in a transmissivity cell with a new testing procedure to quantify the flow rate and the interface transmissivity between the coating or attached film presenting a hole and the upper geotextile of the GCL. The testing device was previously used in studies aiming to evaluate the interface transmissivity between a damaged geomembrane (GM) and a regular GCL. Different results are obtained regarding the evolution with the time of the flow rate ranging from 1.73 x 10-11 m3/s to 2.18 x 10-10 m3/s at steady state, which is on average in the range of flow rate results obtained with a GM-GCL composite liner. Additional tests performed by adding a GM on top give lower values of flow rates. This shows the importance of the film or coating rigidity for decreasing flow rate and insuring a better quality contact at the interface.
Author: B. Kennedy
Publisher:
ISBN:
Category : Abrasion testing
Languages : en
Pages : 6
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Book Description
Geosynthetic clay liners (GCLs) are used in numerous applications from earth-work-related projects such as ponds and landfills to concrete-related work such as waterproofing applications. Multi-component GCLs have been used extensively in the past two decades; however, some multi-component GCLs should be used only in specific applications and should not be used in earth-work-related projects where abrasion-type damages might occur. Two types of multi-component GCLs were used in various shear box tests to help simulate potential abrasion-type damages that might occur in field projects. A polypropylene-coated GCL and a polyethylene-laminated geofilm GCL were subjected to various subgrade conditions to determine whether damage occurred. However, it should be said that multi-component GCLs are made and offered to eliminate some unknown factors on projects such as a lack of subgrade information provided prior to deployment start up, and thus there is a need for them.
Author: Zehong Yuan
Publisher:
ISBN:
Category : Boundary effect
Languages : en
Pages : 10
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Book Description
The internal shear strength of geosynthetic clay liners (GCLs) can be evaluated through direct shear testing in accordance with ASTM D6243 under a specific set of boundary conditions for a given normal stress. In order to prevent slippage at the GCL-gripping system interface and ensure an internal shear failure of the GCL, a gripping surface made of spikes 1 to 2mm tall mounted on a rigid substrate is recommended in the standard method and has been commonly used. It is recognized that certain boundary effects exist as a result of the aggressive gripping system. To improve the hydraulic performance and/or protect the bentonite core, a multi-component GCL is designed to have a thin membrane or film laminated or glued to one of the carrier geotextiles. It is necessary to investigate the boundary effect on the multi-component GCL internal shear strength tests, because the film- or membrane-geotextile interface is more prone to interference from the rough gripping surface recommended by the current standard. A series of internal shear strength tests were conducted on the same multi-component GCL product under different gripping conditions. It was found that tests using the aggressive gripping system yield a significantly higher peak shear strength of the multi-component GCL and a lower residual shear strength at large displacements.
Author: Larry W. Well
Publisher: ASTM International
ISBN: 0803124716
Category : Geosynthetics
Languages : en
Pages : 270
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Book Description
An engineering perspective on the liners, which are used as barriers for containing liquid and in conjunction with geomembranes in landfills and capping systems. Explore aspects of testing for shear strength and long-term creep, issues and methods of testing for hydraulic conductivity, and specifica
Author: K. P. von Maubeuge
Publisher:
ISBN:
Category : Coating
Languages : en
Pages : 14
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Book Description
In the following publication results from overlap testing of polyethylene(PE) coated geosynthetic clay liners (GCL) are presented and discussed. A permeation can only occur through the overlaps. Overlaps were tested with a width of 300 mm and 150 mm. The wider overlaps did not show any permeation at all, however minor permeation was detected with the 150 mm wide overlaps. Additionally a series of overlaps were performed by taping the overlaps with a 50 mm wide tape. The overlapped GCL was 150 mm and 75 mm. Under these test conditions no permeation was detected. Further the research was carried out with perforated holes in the PE coating. In this case the water distribution in the area of the hole(s) was investigate. Aim of this study was to better understand the permeation in the overlap area as well through perforated holes.
