Flow Rate Measurement in Multi-Component Geosynthetic Clay Liners PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Flow Rate Measurement in Multi-Component Geosynthetic Clay Liners PDF full book. Access full book title Flow Rate Measurement in Multi-Component Geosynthetic Clay Liners by K. P. von Maubeuge. Download full books in PDF and EPUB format.
Author: K. P. von Maubeuge
Publisher:
ISBN:
Category : Flow rate
Languages : en
Pages : 12
Get Book Here
Book Description
A procedure was developed that combines measuring devices from NF EN 14150 for flow rate measurement through geomembranes and a rigid wall permeameter from NF P84-705. The new procedure aims at measuring flow rates through geosynthetic clay liners (GCLs) in order to measure flow rates through multi-component GCLs. The resulting testing device allows one to measure very small variations in volume with time while applying constant hydraulic pressures. The pressure difference applied on both sides of the multi-component GCL specimens varied between 25 kPa and 100 kPa, with the latter value being equal to the one applied across geomembranes in NF EN 14150. Three different multi-component GCLs from two different manufacturers were tested in order to determine the ability of the testing equipment to quantify the flow rate through multi-component GCLs. The flow rate measurement was performed after a hydration phase under very low hydraulic head and with a 10 kPa normal load on the specimens in accordance with NF P84-705. Details regarding the experimental conditions that could lead to the development of a standard for the measurement of flow rates through multi-component GCLs are given. Results obtained tend to show that flow rates are 1 order of magnitude larger than the ones usually measured for virgin geomembranes (i.e., 10-5 m3/m2/d).
Author: K. P. von Maubeuge
Publisher:
ISBN:
Category : Flow rate
Languages : en
Pages : 12
Get Book Here
Book Description
A procedure was developed that combines measuring devices from NF EN 14150 for flow rate measurement through geomembranes and a rigid wall permeameter from NF P84-705. The new procedure aims at measuring flow rates through geosynthetic clay liners (GCLs) in order to measure flow rates through multi-component GCLs. The resulting testing device allows one to measure very small variations in volume with time while applying constant hydraulic pressures. The pressure difference applied on both sides of the multi-component GCL specimens varied between 25 kPa and 100 kPa, with the latter value being equal to the one applied across geomembranes in NF EN 14150. Three different multi-component GCLs from two different manufacturers were tested in order to determine the ability of the testing equipment to quantify the flow rate through multi-component GCLs. The flow rate measurement was performed after a hydration phase under very low hydraulic head and with a 10 kPa normal load on the specimens in accordance with NF P84-705. Details regarding the experimental conditions that could lead to the development of a standard for the measurement of flow rates through multi-component GCLs are given. Results obtained tend to show that flow rates are 1 order of magnitude larger than the ones usually measured for virgin geomembranes (i.e., 10-5 m3/m2/d).
Author: K. P. von Maubeuge
Publisher:
ISBN:
Category : Advective flow
Languages : en
Pages : 15
Get Book Here
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: Z. Yuan
Publisher:
ISBN:
Category : Geomembranes
Languages : en
Pages : 9
Get Book Here
Book Description
Large-scale flow rate testing was performed on a multi-component GCL, a needlepunch-reinforced woven/nonwoven product with a polyethylene geofilm laminated to the nonwoven side. Testing was performed in a 0.56 -m (1.8-ft) inside diameter pressure vessel commonly used for large-scale hydrostatic puncture testing of geosynthetics by ASTM D5514 [Annual Book of ASTM Standards, ASTM International, West Conshohocken, PA]. Two separate large-scale flow tests were performed in this study: (1) intact (unseamed) samples of the multi-component GCL placed over a subgrade stone protrusion, and (2) seamed samples of the multi-component GCL. Samples were placed over a compacted soil subgrade under a confining stress of 6.3 kPa (132 psf), soaked with tap water for 24 h, and then subjected to hydrostatic pressures ranging from 69 to 620 kPa (10 to 90 psi). Flow rates through the samples were monitored through a burette for at least 24 h. Measurements of inflow versus time for the two tests were used to assess vertical flow through the intact GCL specimen and preferential flow through the GCL seams. Because seam coverage in the field differs from the seam coverage in the laboratory testing device, seam coverage factors were derived to predict leakage through GCL field-scale seams. The testing program concluded that the flow rate through seamed GCL sections were only slightly higher than the unseamed sections.
Author: Kent P. von Maubeuge
Publisher:
ISBN:
Category : Coating barrier
Languages : en
Pages : 11
Get Book Here
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: Giovanni Biondi
Publisher: CRC Press
ISBN: 1003813852
Category : Technology & Engineering
Languages : en
Pages : 2826
Get Book Here
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 von Maubeuge
Publisher: ASTM International
ISBN: 9780803175488
Category : Clay
Languages : en
Pages : 154
Get Book Here
Book Description
"Peer-reviewed papers that were presented at a symposium held June 29, 2012 in San Diego, CA"
Author: DE. Daniel
Publisher:
ISBN:
Category : Bentonite
Languages : en
Pages : 12
Get Book Here
Book Description
An important property of geosynthetic clay liners (GCLs) is hydraulic conductivity. The authors describe and evaluate a new device, a GCL flowbox, that offers several advantages over large tanks or flexible-wall permeameters. The GCL flowbox can be used to test large-scale intact specimens, overlapped specimens with a full-width seam, and specimens subjected to environmental stresses such as freeze-thaw. A transparent, acrylic GCL flowbox was developed for testing at low normal stresses, and a metal version was developed for applying higher normal stresses. Results from the GCL flowbox compared favorably to results obtained with tanks and flexible-wall permeameters. It is concluded that the GCL flowbox provides a convenient and reliable testing methodology for verifying the hydraulic conductivity of both intact specimens and overlapped GCL panels.
Author: Liangtong Zhan
Publisher: Springer
ISBN: 981132221X
Category : Science
Languages : en
Pages : 892
Get Book Here
Book Description
This book gathers selected papers presented at the 8th International Congress on Environmental Geotechnics (ICEG), held on October 28 - November 1, 2018 in Hangzhou, China. The theme of the congress is “Towards a Sustainable Geoenvironment”, which means meeting the needs of the present generation without compromising the ability of future generations to meet their own needs. Under this theme, the congress covers a broad range of topics and provides an excellent opportunity for academics, engineers, scientists, government officials, regulators, and planners to present, discuss and exchange notes on the latest advances and developments in the research and application of environmental geotechnics.
Author: ASTM International
Publisher:
ISBN:
Category : Materials
Languages : en
Pages : 532
Get Book Here
Book Description
Author: B. Kennedy
Publisher:
ISBN:
Category : Abrasion testing
Languages : en
Pages : 6
Get Book Here
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.
