Download or read book Long term Hydraulic Performance of Geosynthetic Clay Liners Subjected to Inorganic Salt Solutions written by Jae-Myung Lee and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cation Exchange and Long term Hydraulic Conductivity of Geosynthetic Clay Liners GCLs Permeated with Inorganic Salt Solutions written by Ho Young Jo and published by . This book was released on 2003 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the 16th International Conference on Soil Mechanics and Geotechnical Engineering written by The Organizing Committee of the 16th ICSMGE and published by IOS Press. This book was released on 2005-09-12 with total page 3742 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 16th ICSMGE responds to the needs of the engineering and construction community, promoting dialog and exchange between academia and practice in various aspects of soil mechanics and geotechnical engineering. This is reflected in the central theme of the conference 'Geotechnology in Harmony with the Global Environment'. The proceedings of the conference are of great interest for geo-engineers and researchers in soil mechanics and geotechnical engineering. Volume 1 contains 5 plenary session lectures, the Terzaghi Oration, Heritage Lecture, and 3 papers presented in the major project session. Volumes 2, 3, and 4 contain papers with the following topics: Soil mechanics in general; Infrastructure and mobility; Environmental issues of geotechnical engineering; Enhancing natural disaster reduction systems; Professional practice and education. Volume 5 contains the report of practitioner/academic forum, 20 general reports, a summary of the sessions and workshops held during the conference.
Download or read book Advances in Environmental Geotechnics written by Yunmin Chen and published by Springer Science & Business Media. This book was released on 2011-02-04 with total page 944 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Advances in Environmental Geotechnics" presents the latest developments in this interdisciplinary field. The topics covered include basic and advanced theories for modeling of geoenvironmental phenomena, testing and monitoring for geoenvironmental engineering, municipal solid wastes and landfill engineering, sludge and dredged soils, geotechnical reuse of industrial wastes, contaminated land and remediation technology, applications of geosynthetics in geoenvironmental engineering, geoenvironmental risk assessment, management and sustainability, ecological techniques and case histories. This proceedings includes papers authored by core members of ISSMGE TC5 (International Society of Soil Mechanics and Geotechnical Engineering---Environmental Geotechnics) and geoenvironmental researchers from more than 20 countries and regions. It is a valuable reference for geoenvironmental and geotechnical engineers as well as civil engineers. Yunmin Chen, Xiaowu Tang, and Liangtong Zhan are Professors at the Department of Civil Engineering of Zhejiang University, China.
Download or read book Canadian Geotechnical Journal written by and published by . This book was released on 2012 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assessment of the Performance of Engineered Waste Containment Barriers written by National Research Council and published by National Academies Press. This book was released on 2007-09-22 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: President Carter's 1980 declaration of a state of emergency at Love Canal, New York, recognized that residents' health had been affected by nearby chemical waste sites. The Resource Conservation and Recovery Act, enacted in 1976, ushered in a new era of waste management disposal designed to protect the public from harm. It required that modern waste containment systems use "engineered" barriers designed to isolate hazardous and toxic wastes and prevent them from seeping into the environment. These containment systems are now employed at thousands of waste sites around the United States, and their effectiveness must be continually monitored. Assessment of the Performance of Engineered Waste Containment Barriers assesses the performance of waste containment barriers to date. Existing data suggest that waste containment systems with liners and covers, when constructed and maintained in accordance with current regulations, are performing well thus far. However, they have not been in existence long enough to assess long-term (postclosure) performance, which may extend for hundreds of years. The book makes recommendations on how to improve future assessments and increase confidence in predictions of barrier system performance which will be of interest to policy makers, environmental interest groups, industrial waste producers, and industrial waste management industry.
Download or read book Proceedings of the 8th International Congress on Environmental Geotechnics Volume 2 written by Liangtong Zhan and published by Springer. This book was released on 2018-10-10 with total page 742 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the third volume of the proceedings of the 8th International Congress on Environmental Geotechnics (ICEG 2018), 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.
Download or read book Geosynthetic Clay Liners for Waste Containment Facilities written by Abdelmalek Bouazza and published by CRC Press. This book was released on 2009-11-16 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increasingly stringent regulation of pollution and waste production worldwide drives the need to isolate contaminants that pose a threat to human and environmental health by using engineered barrier systems involving the use of low permeable materials. Over the past two decades, geosynthetic clay liners have gained widespread acceptance for use in such barrier systems. They are often used as a component of primary and secondary base liners or final cover systems in municipal solid-waste landfills as well as in regulated industrial storage and mining waste-disposal facilities. This book gives a comprehensive and authoritative review of the current state of practice on geosynthetic clay liners in waste containments. It provides an insight into individual materials (bentonite and the associated geosynthetics) and the manufacturing processes. This is followed by the coverage of important topics such as hydraulic conductivity, chemical compatibility, contaminant transport, gas migration, shear strength and slope stability, and field performance.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2004 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Compatibility of Geosynthetic Clay Liners with Acidic Solutions written by Yang Liu and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Geosynthetic clay liners (GCLs) are widely used as hydraulic barriers because of their sealing capacity in contact with water. However, with the increasing interest in their use in mining applications, the compatibility issues of GCLs to mining leachates are of some concern. This research work has been undertaken to enhance our understanding of compatibility of GCLs with strong acidic leachates, as for example, which may occur in mining leachates. Three types of bentonites were selected for this research program. Tests included index tests such as Atterberg limits, swell index, fluid loss and suspension rheology under various concentrations of sulfuric acid solutions. The results indicate that all index parameters degraded when the materials were exposed to acidic solutions. The degradation of these indices would indicate a high probability for the degradation of hydraulic performance of GCLs to occur based on established correlations between hydraulic conductivity and these indices. The mineralogical analyses on bentonite components of GCLs before and after reaction with sulfuric acid solutions were conducted using X-ray diffraction (XRD), infrared spectroscopy (IR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) methods. The dissolution of bentonite, loss of water from smectite interlayers, and the collapse of smectite layers were observed using these methods, these observations explained in part the degradation of the engineering indices and hydraulic performance of bentonites or GCLs. A series of flexible-wall permeameter tests were conducted to directly evaluate the hydraulic performance of GCLs when subjected to different concentrations of sulfuric acid solutions. Effective stress and prehydration condition, both of which can affect the hydraulic performance, were also considered. The hydraulic conductivity was observed to increase with increasing sulfuric acid concentration, but specimens prehydrated with water had lower resulting hydraulic conductivity to sulfuric acid leachates than non-prehydrated specimens. Higher applied effective stress tended to decrease the hydraulic conductivity presumably by compressing the specimens thereby resulting in smaller hydraulically active pores. Three powdered polymers, having either negative, positive or neutral charges, were used in this study to determine whether the hydraulic performance of bentonites under acidic conditions could be improved. Any improvements achieved were only observed under deionized water and low sulfuric acid concentration (≤0.015 M). Generally, no significant differences in test parameters caused by the polymer types (cationic, non-ionic and anionic) were observed under DI water and low sulfuric acid concentration (≤ 0.015 M). However, at higher acid concentrations, these polymers tended to lose effectiveness due probably to pH induced changes in polymer conformation, from presumably elongation to aggregate, at the clay surface. Sulfuric acid is detrimental to the hydraulic performance of GCLs, even if GCLs are prehydrated with good quality water. With better knowledge of how GCLs behave under strong acidic conditions, the geotechnical engineering community will be better equipped to approach and resolve potential problems involving interaction between GCLs and acidic solutions.
Download or read book Clay Geosynthetic Barriers written by H. Zanzinger and published by CRC Press. This book was released on 2022-01-27 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: Clay geosynthetic barriers are most frequently used in environmental areas, such as landfill cover systems. This work discusses the durability and lifetime aspects of clay geosynthetic barriers related to the synthetic yarns and fibres.
Download or read book Transactions of the American Society of Civil Engineers written by American Society of Civil Engineers and published by . This book was released on 2005 with total page 1176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. 29-30 contain papers of the International Engineering Congress, Chicago, 1893; v. 54, pts. A-F, papers of the International Engineering Congress, St. Louis, 1904.
Download or read book Geotechnical Practice for Waste Disposal written by D.E. Daniel and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 686 pages. Available in PDF, EPUB and Kindle. Book excerpt: Earth scientists and geotechnical engineers are increasingly challenged to solve environmental problems related to waste disposal facilities and cleanup of contaminated sites. The effort has given rise to a new discipline of specialists in the field of environmental geotechnology. To be effective, environmental geotechnologists must not only be armed with the traditional knowledge of fields such as geology and civil engineering, but also be knowledgeable of principles of hydrogeology, chemistry, and biological processes. In addition, the environmental geotechnologist must be completely up to date on the often complex cadre of local and national regulations, must comprehend the often complex legal issues and sometimes mind-boggling financial impli cations of a project, and must be able to communicate effectively with a host of other technical specialists, regulatory officials, attorneys, local land owners, journalists, and others. The field of environmental geo technology will no doubt continue to offer unique challenges. The purpose of this book is to summarize the current state of practice in the field of environmental geotechnology. Part One covers broadly applicable principles such as hydrogeology, geochemistry, and con taminant transport in soil and rock. Part Two describes in detail the underlying principles for design and construction of new waste disposal facilities. Part Three covers techniques for site remediation. Finally, Part Four addresses the methodologies for monitoring. The topics of 'waste disposal' and 'site remediation' are extra ordinarily broad.
Download or read book Self Healing Polymers written by Wolfgang H. Binder and published by John Wiley & Sons. This book was released on 2013-03-29 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt: Self-healing is a well-known phenomenon in nature: a broken bone merges after some time and if skin is damaged, the wound will stop bleeding and heals again. This concept can be mimicked in order to create polymeric materials with the ability to regenerate after they have suffered degradation or wear. Already realized applications are used in aerospace engineering, and current research in this fascinating field shows how different self-healing mechanisms proven successful by nature can be adapted to produce even more versatile materials. The book combines the knowledge of an international panel of experts in the field and provides the reader with chemical and physical concepts for self-healing polymers, including aspects of biomimetic processes of healing in nature. It shows how to design self-healing polymers and explains the dynamics in these systems. Different self-healing concepts such as encapsulated systems and supramolecular systems are detailed. Chapters on analysis and friction detection in self-healing polymers and on applications round off the book.
Download or read book Assessment of Modern Geosynthetic Clay Liners as Effective Hydraulic Barriers written by Christian Kankam Wireko and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of this study also indicate that, due to the mobility the linear polymer gel, hydraulic conductivity testing of a PMB GCL should not be terminated until the ratio of effluent and influent TOC concentration is at least 1.25 or lower (id est TOCout/TOCin ≤ 1.25) in addition to the termination criteria specified by the current ASTM D6766, in order to adequately assess the long-term hydraulic performance of the PMB GCL. The time required to achieve this new TOC criterion varies depends on the chemistry of the permeant solution. The results of duplicate hydraulic conductivity tests show that high hydraulic gradient (>500) can be used to shorten the test duration. Hydraulic gradient only increases the rate at which polymer elutes but does not have any impact of final hydraulic conductivity of PMB GCLs.
Download or read book Transportation Water and Environmental Geotechnics written by C. N. V. Satyanarayana Reddy and published by Springer Nature. This book was released on 2021-08-02 with total page 457 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book comprises select proceedings of the Indian Geotechnical Conference 2020 (IGC2020) focusing on emerging opportunities and challenges in the field of transportation geotechnics, scour and erosion, offshore geotechnics, and environmental geotechnology. The contents will be useful to researchers, educators, practitioners and policy makers alike.
Download or read book Investigation of the Behavior of Geosynthetic Clay Liners Subjected to Thermal Gradients in Basal Liner Applications written by JM. Southen and published by . This book was released on 2004 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Composite liners comprised of geomembranes and geosynthetic clay liners can be an effective means of minimizing fluid flow and associated groundwater contamination from municipal solid waste landfills. There remains uncertainty, however, regarding the long-term performance of such systems under conditions of elevated temperature that may occur at the base of landfills attributable to exothermic waste degradation processes. The heat generated by these processes may lead to the development of a thermal gradient through the lining system that creates a risk of desiccation within the uppermost portion of the subsoil and the geosynthetic clay liner itself. To investigate this issue, a series of small-scale laboratory experiments were developed in an effort to simulate the hydraulic and thermal conditions existing at the base of a landfill. This paper presents the results of investigations into the influence of various parameters on the behavior of a composite liner. The distribution of temperature and water content over time is discussed, as well as potential impacts on the performance of the geosynthetic clay liner.
