Download or read book Pore size distribution of sandy soils and the prediction of permeability written by and published by . This book was released on 1981 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pore Size Distribution of Sandy Soils and the Prediction of Permeability written by Charng-Hsein Juang and published by . This book was released on 1981 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pore Size Distribution of Sandy Soils and the Prediction of Permeability written by C. H. Juang and published by . This book was released on 1983 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Relation of Pore Size Distribution to Permeability of Soils written by Arnold Klute and published by . This book was released on 1948 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Predicting the Permeability of Sandy Soils from Grain Size Distributions written by Emine Mercan Onur and published by . This book was released on 2013 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: Permeability is one of the most important and frequently used properties of soils. Grain size distribution and density are known to influence the permeability of sandy soils. Although the relationships between grain size distribution and permeability has been quantified in previous studies, the influenced of density has not been quantified. The objective of this research was to investigate the quantitative relationships between permeability and grain size distribution indices such as effective particle size (D10), coefficient of uniformity (Cu), coefficient of curvature (Cc), percentage of coarse sand fraction by weight of sample (%C), percentage of medium sand fraction by weight of sample (%M), and percentage of fine sand fraction by weight of sample (%F) to determine whether these relationships could be used for reliable estimates of permeability. Six samples of sandy soils, ranging from well graded to poorly graded, were tested in the laboratory to determine their grain size distribution, maximum dry density (MDD), and optimum water content (OWC). The D10, Cu, Cc, %C, %M, and %F values for each soil were calculated from the grain size distribution plots. Based on the compaction curves, five replicate samples of each soil were prepared at varying dry density values and tested for permeability using the constant head permeability test. Results show that the lowest permeability for sandy soils is achieved at or slightly on the dry side of OWC. To investigate the relationship between permeability and grain size distribution indices, bivariate and step-wise regression analyses were performed. The results show that D10, density, and %M have the strongest correlation (Adjusted R2 = 0.67) with permeability, explaining 67% of the variability in permeability. Permeability depends on the sizes and shapes of interconnections between adjacent pores which, in turn, are influenced by the entire grain size distribution. This research proposes a new grain size distribution index for predicting permeability, designated as the new permeability index. In addition to considering the entire grain size distribution, the new permeability index assigns different weights to different size fractions in the soil with the finest fraction having the maximum weight and the coarsest fraction having the least weight. The new permeability index values for the six soils were correlated with their corresponding permeability values, resulting in a second order quadratic equation with an R2 value of 0.76. This relationship can reliably be used to predict permeability as is indicated by the small amount of residuals between measured and predicted values of permeability. A 3-D model was developed to show the combined effect of the new permeability index and density on permeability.
Download or read book Correlative Measurements of Pore Size Distribution and Permeability in Soils written by I. Garcia-Bengochea and published by . This book was released on 1981 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurements and use of pore size distributions to explain the behavior of engineering materials are not new. However, there are few, if any, reports of a simplified methodology and its direct application to engineering predictions. This paper explains how pore size measurements and water permeability were correlated for compacted samples of saturated clayey silt. The results strongly support the hypothesis that a new generation of permeability prediction equations is now possible. In the new equations, the old soil parameters of effective grain size, total porosity (or void ratio), and specific surface are effectively replaced by appropriate parameters of the pore size distribution.
Download or read book Pore Size Distributions as Measured by the Mercury Intrusion Method and Their Use in Predicting Permeability written by Glen O.. Klock and published by . This book was released on 1968 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: A number of investigators have proposed equations to predict the permeability of porous media. Most of their equations are based on the distributions of the sizes of the various contributing pores in the medium. Presently the pore size distributions of agricultural soils are most commonly obtained from soil water release curves. The pressure scale is converted into an equivalent pore diameter scale by means of the pressure of displacement equation. This method is time consuming. The study reported in this thesis was initiated to (1) use a mercury intrusion method to obtain pore size distributions of porous materials similar to agricultural soils, (2) use the pore size distributions thus obtained with existing equations to calculate intrinsic permeability and (3) compare the calculated permeability values with measured values for a range of particle size distributions. The permeabilities and the pore size distributions of 54 systematically selected particle size classes of glass beads and crushed quartz sand were measured. The particle size classes ranged from 44 to 246 microns in diameter. The pore size distributions were evaluated and used in Marshall's proposed permeability prediction equation. The measured permeabilities did not agree with the calculated values until a correction factor which is a function of the pore diameter was used. It is apparent that the pressure of displacement equation measures only an effective pore dimension. Permeability prediction equations require the evaluation of an effective hydraulic dimension. These two dimensions are different and are influenced by the geometry of the pore aperture. A necessary correction factor has been developed which accounts for the difference between the measured and hydraulic dimension when the mercury intrusion technique is used to measure pore size distributions. The results of this study have improved and given a better theoretical basis for permeability predictions equations.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1982 with total page 1282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Microstructure of Fine Grained Sediments written by W.A. Chiou and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: Knowledge of basic clay microstructure is fundamental to an understanding of the physical, chemical, and mechanical properties of fine-grained sediments and rocks. This compilation of fifty-nine peer-reviewed papers examines clay microstructure in detail with comprehensive sections focusing on microstructure signatures, environmental processes, modeling, measurement techniques, and future research recommendations. Many of these topics are discussed in light of geological and engineering applications, such as hazardous waste disposal, construction techniques, and drilling programs. The field of clay microstructure is developing rapidly. The concepts, observations, and principles presented in this book will help stimulate new thought and be a "spring board" for exciting new research.
Download or read book Advances in Transportation Geotechnics IV written by Erol Tutumluer and published by Springer Nature. This book was released on 2021-08-30 with total page 971 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents selected papers presented during the 4th International Conference on Transportation Geotechnics (ICTG). The papers address the geotechnical challenges in design, construction, maintenance, monitoring, and upgrading of roads, railways, airfields, and harbor facilities and other ground transportation infrastructure with the goal of providing safe, economic, environmental, reliable and sustainable infrastructures. This volume will be of interest to postgraduate students, academics, researchers, and consultants working in the field of civil and transport infrastructure.
Download or read book Pore Geometry Effect on Gaseous Diffusion and Convective Fluid Flow in Soils written by Atac Tuli and published by . This book was released on 2001 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Permeability and Pore Size Distribution of Five South Dakota Soil Types written by W. C. Moldenhauer and published by . This book was released on 1951 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Correlation Study of Infiltration Permeability and Pore Size Distribution written by Howard Albert Vollbrecht and published by . This book was released on 1954 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Percolation Theory for Flow in Porous Media written by Allen Hunt and published by Springer Science & Business Media. This book was released on 2009-05-05 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: Why would we wish to start a 2nd edition of “Percolation theory for ?ow in porous media” only two years after the ?rst one was ?nished? There are essentially three reasons: 1) Reviews in the soil physics community have pointed out that the introductory material on percolation theory could have been more accessible. Our additional experience in teaching this material led us to believe that we could improve this aspect of the book. In the context of rewriting the ?rst chapter, however, we also expanded the discussion of Bethe lattices and their relevance for “classical” - ponents of percolation theory, thus giving more of a basis for the discussion of the relevance of hyperscaling. This addition, though it will not tend to make the book more accessible to hydrologists, was useful in making it a more complete reference, and these sections have been marked as being possible to omit in a ?rst reading. It also forced a division of the ?rst chapter into two. We hope that physicists without a background in percolation theory will now also ?nd the - troductory material somewhat more satisfactory. 2) We have done considerable further work on problems of electrical conductivity, thermal conductivity, and electromechanical coupling.
Download or read book Developments in Petrophysics written by M. A. Lovell and published by Geological Society of America. This book was released on 1997 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: Petrophysics is the study of the physical properties of rocks in the broadest sense. It provides the fundamental understanding that enables geologists to describe the physical state of a rock, to predict its behaviour and to interpret geophysical data. This volume includes developments in pore-scale studies, electrical properties, seismic methods and measurement techniques, as well as reviewing aspects of petrophysical prediction and interpretation.
Download or read book The Relation Between Permeability and Pore Size Distribution of Compacted Clayey Silts written by Ignacio Garcia-Bengochea and published by . This book was released on 1978 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book SRIM Index written by and published by . This book was released on 1982 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt:
