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Book Effect of Freeze thaw and Wet dry Cycles on Compacted Soil Barriers

Download or read book Effect of Freeze thaw and Wet dry Cycles on Compacted Soil Barriers written by Monica Williams (M.E.Sc.) and published by . This book was released on 2004 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Effect of a Freeze thaw Cycle on the Dry Bulk Density of a Soil

Download or read book The Effect of a Freeze thaw Cycle on the Dry Bulk Density of a Soil written by Robert George Cessford and published by . This book was released on 1970 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary purpose of this investigation was to examine one aspect of the compaction problem, viz. the effect of a freeze-thaw cycle on the bulk density of a soil. Moisture content, temperature (freezing rate) and initial density were parameters considered in the project. A moisture-density meter was designed and built for the purpose of measuring bulk density and moisture content non-destructively. Analysis of variance and multiple regression techniques were used to analyze the data. The following results and conclusions were obtained: 1. Non-destructive measurement of soil bulk density and moisture content was achieved using a dual energy gamma transmission technique. 2. Significant density changes were caused by an interaction of the parameters temperature x initial density. 3. Density changes due to the levels of the factors considered in the experiment were small, indicating little loosening of compacted soil during a freeze-thaw cycle. 4. Prediction of density responses in the field would not be possible on the basis of results obtained in this experiment.

Book The Effects of Freeze Thaw Cycles on the Permeability of Three Compacted Soils

Download or read book The Effects of Freeze Thaw Cycles on the Permeability of Three Compacted Soils written by JJ. Bowders and published by . This book was released on 1994 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three soils: a processed kaolinite, a pulverized shale used as a liner material, and a residual clay soil used as a liner material were compacted using the standard Proctor method and permeated with distilled, deionized water in flexible-wall permeameters. Specimens were subjected to freezing and thawing in an environmental chamber. After being thawed the specimens were again permeated in the flexible-wall permeameters. The freeze/thaw process increased the permeability in all three soils. The kaolinite and residual clay soil showed increases in permeability ranging from one to two orders of magnitude above the pre-freeze/thaw values. The permeability of the pulverized shale increased by less than a factor of three. Post-freeze/thaw permeation at progressively higher effective confining stresses reversed the increase in permeability and resulted in decreasing the permeability from the post-freeze/thaw values. This reduction in permeability was greatest for the kaolinite and the residual clay (one to two orders of magnitude); it was the least for the pulverized shale (maximum of a factor of about two). The results of this study indicated that the magnitude of the change in permeability of specimens subjected to freeze/thaw increased with increasing plasticity of the soils. These findings are in agreement with previous literature that freezing and thawing do increase the permeability of a soil but that the increase can be reduced when effective stress on the soil is increased.

Book Technical Aspects Related to the Design and Construction of Engineered Containment Barriers for Environmental Remediation

Download or read book Technical Aspects Related to the Design and Construction of Engineered Containment Barriers for Environmental Remediation written by IAEA and published by International Atomic Energy Agency. This book was released on 2023-12-15 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: Containment barrier systems are among the most widely used technologies for remediating contaminated sites. Various structures have been engineered to address site-specific needs, while barrier selection depends largely on whether regulatory requirements are prescriptive, or performance based. This publication provides an introduction to the design and construction of different containment barriers for low-level radioactive waste generated from remediation activities: basal (bottom) liners, final covers, in situ vertical barriers and in situ permeable reactive barriers. Practical aspects of each structure are discussed in theoretical case studies, which allow remediation project designers, implementers and regulators to make more informed decisions about the use of these barriers.

Book Barrier Systems for Environmental Contaminant Containment and Treatment

Download or read book Barrier Systems for Environmental Contaminant Containment and Treatment written by Calvin C. Chien and published by CRC Press. This book was released on 2005-10-31 with total page 409 pages. Available in PDF, EPUB and Kindle. Book excerpt: Containment and permeable reactive barriers have come full circle as an acceptable environmental control technology during the past 30 years. As interest shifted back toward containment in the 1990s, the industry found itself relying largely on pre-1980s technology. Fortunately, in the past 10 years important advances have occurred in several areas

Book Assessment of the Performance of Engineered Waste Containment Barriers

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 2007-08-22 with total page 134 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.

Book Clay Geosynthetic Barriers

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.

Book Process Engineering for Pollution Control and Waste Minimization

Download or read book Process Engineering for Pollution Control and Waste Minimization written by Donald L. Wise and published by CRC Press. This book was released on 1994-02-15 with total page 750 pages. Available in PDF, EPUB and Kindle. Book excerpt: Offers up-to-date technical information on current and potential pollution control and waste minimization practices, providing industry-specific case studies, techniques and models.

Book Foundation Engineering Handbook

Download or read book Foundation Engineering Handbook written by Hsai-Yang Fang and published by Springer Science & Business Media. This book was released on 1990-12-31 with total page 954 pages. Available in PDF, EPUB and Kindle. Book excerpt: More than ten years have passed since the first edition was published. During that period there have been a substantial number of changes in geotechnical engineering, especially in the applications of foundation engineering. As the world population increases, more land is needed and many soil deposits previously deemed unsuitable for residential housing or other construction projects are now being used. Such areas include problematic soil regions, mining subsidence areas, and sanitary landfills. To overcome the problems associated with these natural or man-made soil deposits, new and improved methods of analysis, design, and implementation are needed in foundation construction. As society develops and living standards rise, tall buildings, transportation facilities, and industrial complexes are increasingly being built. Because of the heavy design loads and the complicated environments, the traditional design concepts, construction materials, methods, and equipment also need improvement. Further, recent energy and material shortages have caused additional burdens on the engineering profession and brought about the need to seek alternative or cost-saving methods for foundation design and construction.

Book The Effect of Freeze thaw Cycles on Soil Respiration and Nitrogen Dynamics as In fluenced by Soil Structure Aggregate Size and Water Content

Download or read book The Effect of Freeze thaw Cycles on Soil Respiration and Nitrogen Dynamics as In fluenced by Soil Structure Aggregate Size and Water Content written by Bangwei Zhang and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The role of soil structure and aggregation in influencing soil respiration and N dynamics in soils undergoing freeze-thaw cycles, as influenced by water content, is poorly known. Surface soil with a texture of sandy loam was collected from an agriculture field in Atlantic Canada. Two studies were undertaken. The first study determined the influence of soil structure (whole / crushed soil) and water content (35%, 60%, and 85% water-filled pore space) on soil respiration and nitrogen dynamics during freezing and thawing of the soil. The second study determined the role of different aggregate size fractions (0~0.25, 0.25~4, and 4~8 mm) on the freeze-thaw effect. The research found microbial metabolism is more limited by environmental conditions than by the substrate availability. Crushing altered structural characteristics and caused changes in substrate solubilization and / or microbial utilization of substrates during freezing and thawing. Furthermore, freezing and thawing did not influence the denitrification of the whole soil, but enhanced denitrification in soils where aggregates were crushed. At 60% WFPS, the interaction among aggregate crushing and freeze-thaw increased denitrification. Also, the impact of freeze-thaw was greater on soil respiration and N mineralization in medium size aggregates (0.25~4mm). Freezing and thawing improved de-nitrification in aggregates on all three size fractions. This project provided new information on the effects of freeze-thaw on soil carbon and nitrogen dynamics as influenced by soil structure and water content. This information will be critical in assessing the impact of climate change in soil carbon and nitrogen dynamics in temperate regions.

Book Fundamentals of Geoenvironmental Engineering

Download or read book Fundamentals of Geoenvironmental Engineering written by Abdel-Mohsen O. Mohamed and published by Butterworth-Heinemann. This book was released on 2017-10-31 with total page 710 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamentals of Geoenvironmental Engineering: Understanding Soil, Water, and Pollutant Interaction and Transport examines soil-water-pollutant interaction, including physico-chemical processes that occur when soil is exposed to various contaminants. Soil characteristics relevant to remedial techniques are explored, providing foundations for the correct process selection. Built upon the authors' extensive experience in research and practice, the book updates and expands the content to include current processes and pollutants. The book discusses propagation of soil pollution and soil characteristics relevant to remedial techniques. Practicing geotechnical and environmental engineers can apply the theory and case studies in the book directly to current projects. The book first discusses the stages of economic development and their connections to the sustainability of the environment. Subsequent chapters cover waste and its management, soil systems, soil-water and soil-pollutant interactions, subsurface transport of pollutants, role of groundwater, nano-, micro- and biologic pollutants, soil characteristics that impact pollution diffusion, and potential remediation processes like mechanical, electric, magnetic, hydraulic and dielectric permittivity of soils. - Presents a clear understanding of the propagation of pollutants in soils - Identifies the physico-chemical processes in soils - Covers emerging pollutants (nano-, micro- and biologic contaminants) - Features in-depth coverage of hydraulic, electrical, magnetic and dielectric permittivity characteristics of soils and their impact on remedial technologies

Book Nondestructive and Automated Testing for Soil and Rock Properties

Download or read book Nondestructive and Automated Testing for Soil and Rock Properties written by W. Allen Marr and published by ASTM International. This book was released on 1999 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: