Download or read book A Stress Controlled Study of Swelling Characteristics of Compacted Expansive Clays written by V. Dakshanamurthy and published by . This book was released on 1979 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: The swelling characteristics of statically compacted expansive clays subjected to given isotropic and anisotropic stress conditions were investigated with a triaxial cell apparatus. A unique relationship was found between maximum volumetric swelling and mean normal stresses. From this relationship one can determine a null swelling pressure that will cause neither swelling nor compression or consolidation or both. It was also determined that the maximum axial and radial swelling decrease exponentially with increase in mean normal stress; this relationship is dependent on the principal stress ratio. The swelling ratio (defined as the ratio of axial swelling to radial swelling) was found to decrease with time allowed for swelling, reaching an equilibrium value termed the equilibrium swelling ratio, which is a function of the boundary loading conditions.
Download or read book Swelling Characteristics of Compacted Expansive Soils written by Narayan Venkatesh Nayak and published by . This book was released on 1971 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization of Compacted Expansive Clays written by Julius Kibiti M'Ndegwa and published by LAP Lambert Academic Publishing. This book was released on 2011-12 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: The problem of expansive clay soil with regard to structural damage of buildings and roads was not recognized until the latter part of 1930. Up to now, some engineers are not familiar with certain characteristics of this soil. Many clay soils may be mistaken for expansive ones and costly structural designs be prepared for structures to be founded on them. Therefore, there is a need to characterize the soil for ease of identification. In this regard, Dr. M'Ndegwa points out that expansive soil can be easily identified through local climate, vegetation, ground topography, physical features of soil and simple laboratory tests. This book defines expansive soil, its occurrence, formation, mineralogical and chemical structure. The author explains the swelling behaviour of clay soil and discusses factors that influence actual amount of swell or shrinkage, concepts of swelling, modes of swelling and mechanisms of swelling. The classification and identification of this soil type including its compaction characteristics are also described. Finally, evaluation of swelling potential is discussed. Students of Civil Engineering and Practising Engineers will find this book very resourceful.
Download or read book Geotechnics in the African Environment volume 1 written by GeoffreyE. Blight and published by Routledge. This book was released on 2022-05-13 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the 10th Regional Conference for Africa on Soil Mechanics and Foundation Engineering and the 3rd International Conference on Tropical and Residual Soils, held in Maseru, Lesotho, September 1991, are contained in two volumes. The papers address geotechnical problems peculiar to Africa and engineering solutions for local problems, as well as data on the properties of African soils.
Download or read book Behaviour of Saturated Expansive Soil and Control Methods written by R.K. Katti and published by CRC Press. This book was released on 2002-01-01 with total page 1270 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text is a compendium of five decades of work relating to science, mechanics and improvement of highly expansive soil systems, application of improved methods to construction of stable civil engineering structures on such deposits. He has used a particulate approach incorporating thermodynamic properties of soil particles as matter to predict the behaviour of saturated expansive soil. The compiling of this massive work has been the effort of the co-authors. The behaviour of expansive soil deposits is found to be unconventional in nature. Prof. Katti has focused on the difference in behaviour by conducting identical studies on conventional soil systems. The book covers topics on basic property, swelling and swelling pressure measurements, shear strength behaviour under various conditions including depth effect, lateral earth pressure development under Ka, Ko and Kp conditions using large-scale devises, discovery of CNS technology and its field application, bearing capacity aspect with and without CNS and MSM, expansive soil improvement techniques, approach to design of rigid and flexible pavements, shallow and raft foundations; optimum length, Hd of underreamed piles, similarity between suction pressure measure approach and cohesion measure approach, use of conventional and small scale test data and simplified approach to estimate he and h, standards, and mechanics of expansive soil media and case histories. He has brought about limitations of existing conventional theories to deal with expansive soil behaviour and the need for incorporating thermodynamic parameters to predict behaviour of saturated expansive soils. This is a unique treatise covering the entire realm of behaviour of saturated expansive soil and control methods. It can act as a database for future research workers and scholars as a guide for construction for practicing engineers and as a sequentially organised scientifically based book for students.
Download or read book Fundamentals of Soil Behavior written by James K. Mitchell and published by . This book was released on 1993 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explains the factors which determine and control the engineering properties of soils--particularly volume change, deformation, strength and permeability. New to this edition: expanded coverage of residual and tropical soils, environmental aspects of soil behavior, material on partly saturated soils, revised treatment of direct or coupled hydraulic, chemical, thermal and electrical flows through soil.
Download or read book Advances in Unsaturated Soils written by Bernardo Caicedo and published by CRC Press. This book was released on 2013-02-01 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt: New theories and testing techniques related with Unsaturated Soil Mechanics have proven to be valuable tools to study a broad spectrum of geo-materials which includes rocks, rock fills, frozen soils and domiciliary solid wastes. These new theories and testing techniques have permitted the analysis of several traditional problems from a new perspective (e.g., swelling or collapsible soils and compacted soils or pavements materials), and they have also shown their efficiency to study new energy-related problems like CO2 sequestration and nuclear waste disposal. Advances in Unsaturated Soils is a collection of papers from the 1st Pan-American Conference on Unsaturated Soils organized in Cartagena de Indias, Colombia, in February 2013. The volume includes 76 research papers coming for all over the world, as well as 7 keynotes papers by well known international researchers. The contributions present a variety of topics including: • Advances in testing techniques • Unsaturated soil behavior • Constitutive modeling and microstructure • Numerical modeling • Geotechnical problems Advances in Unsaturated Soils is expected to become a useful reference to academics and professionals involved in Unsaturated Soil Mechanics.
Download or read book Introductory Geotechnical Engineering written by Hsai-Yang Fang and published by CRC Press. This book was released on 2006-08-21 with total page 577 pages. Available in PDF, EPUB and Kindle. Book excerpt: Integrating and blending traditional theory with particle-energy-field theory, this book provides a framework for the analysis of soil behaviour under varied environmental conditions. This book explains the why and how of geotechnical engineering in an environmental context. Using both SI and Imperial units, the authors cover: rock mechanics soil mechanics and hydrogeology soil properties and classifications and issues relating to contaminated land. Students of civil, geotechnical and environmental engineering and practitioners unfamiliar with the particle-energy-field concept, will find that this book's novel approach helps to clarify the complex theory behind geotechnics.
Download or read book Characterization of the Swelling Behavior of Expansive Clays Using Centrifuge Technology written by Nicolas Alejandro Rivas and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental techniques with emphasis in centrifuge testing were implemented to characterize the swelling behavior of expansive clays. This research consisted in three self-contained sections related to the study of different aspects of expansive clays. The first research component focused on the implementation of a qualitative mineralogy analysis performed using x-ray diffraction to determine the main clay minerals in an expansive soil. The analysis was performed on the clay-sized fraction of the soil and samples with preferential and random orientation were used in the analysis. Vacuum filtration was used to produce oriented samples in order to maximize the intensity of the diagnostic basal spacing of the clay minerals, and samples were subjected to different treatments to produce changes in the basal spacing or crystalline structure of the clay minerals to facilitate their identification. The second research component examined the effect of the coarse fraction on the swelling characteristics of expansive soils using a centrifuge-based approach. Vertical strains at the end of primary swelling were evaluated for different proportions of coarse fraction by volume. It was found that the magnitude of vertical strains at the end of primary swelling decreased with increasing coarse fraction. It was concluded that the swelling depended uniquely on the ratio between the volume of soil solids of the fine fraction and the volume of voids. Additionally, when correcting the initial void ratio of the specimens to account for this, the relationship between vertical strains at the end of primary swelling and initial void ratio for the soil mixtures defines a unique linear trend with the baseline material. The third research component examined the potential vertical rise at three field sites in Central Texas. Method 6048-A was applied to evaluate the PVR of three field sites using direct measurements of the swelling characteristics of soils sampled at each location. Project-specific data was generated in a relatively short time using this centrifuge-based method. The results obtained demonstrated the need for testing of project-specific samples, as a significant variation in PVR was observed in Site 2 and 3 between boring locations, while less variation between borings was found in Site 1
Download or read book Foundations on Expansive Soils written by Fu Hua Chen and published by Elsevier. This book was released on 2012-12-02 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: Foundations on Expansive Soils provides the practicing engineer with a summary of the state-of-the-art of expansive soils and practical solutions based on the author's experience. The book is organized into two parts. Part I deals with theory and practice, and summarizes some of the theoretical physical properties of expansive soils. It also discusses various techniques employed to found structures on expansive soils such as drilled pier foundation, mat foundation, moisture control, soil replacement, and chemical stabilization. Topics covered include the origin, mineralogical composition, and the basic structure of expansive soils; the migration of water, swelling potential, and swelling pressure; site investigations and laboratory testing; moisture control; and soil stabilization. Part II presents case studies on the following: distress caused by pier uplift; distress caused by the improper design and construction of a drilled pier foundation system; distress caused by heaving of footing pad and floor slab; distress caused by heaving of continuous footings; and distress caused by a rise of ground water.
Download or read book Unsaturated Soil Mechanics in Engineering Practice written by Delwyn G. Fredlund and published by John Wiley & Sons. This book was released on 2012-07-24 with total page 946 pages. Available in PDF, EPUB and Kindle. Book excerpt: The definitive guide to unsaturated soil— from the world's experts on the subject This book builds upon and substantially updates Fredlund and Rahardjo's publication, Soil Mechanics for Unsaturated Soils, the current standard in the field of unsaturated soils. It provides readers with more thorough coverage of the state of the art of unsaturated soil behavior and better reflects the manner in which practical unsaturated soil engineering problems are solved. Retaining the fundamental physics of unsaturated soil behavior presented in the earlier book, this new publication places greater emphasis on the importance of the "soil-water characteristic curve" in solving practical engineering problems, as well as the quantification of thermal and moisture boundary conditions based on the use of weather data. Topics covered include: Theory to Practice of Unsaturated Soil Mechanics Nature and Phase Properties of Unsaturated Soil State Variables for Unsaturated Soils Measurement and Estimation of State Variables Soil-Water Characteristic Curves for Unsaturated Soils Ground Surface Moisture Flux Boundary Conditions Theory of Water Flow through Unsaturated Soils Solving Saturated/Unsaturated Water Flow Problems Air Flow through Unsaturated Soils Heat Flow Analysis for Unsaturated Soils Shear Strength of Unsaturated Soils Shear Strength Applications in Plastic and Limit Equilibrium Stress-Deformation Analysis for Unsaturated Soils Solving Stress-Deformation Problems with Unsaturated Soils Compressibility and Pore Pressure Parameters Consolidation and Swelling Processes in Unsaturated Soils Unsaturated Soil Mechanics in Engineering Practice is essential reading for geotechnical engineers, civil engineers, and undergraduate- and graduate-level civil engineering students with a focus on soil mechanics.
Download or read book Expansive Soils written by John Nelson and published by John Wiley & Sons. This book was released on 1997-02-13 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: Essential technical information for building on expansive soils--complete with practical, proven design methods. Expansive Soils examines factors that influence the design offoundations and pavements built on expansive soils, and exploreskey design procedures and remedial measures that address thesefactors effectively. Backed by the authors' extensive research andexperience --including interviews with practicing engineers workingwith expansive soils --this authoritative volume is an importantreference text for geotechnical and foundation engineers,geologists, construction professionals, and students. Easy to understand and apply, Expansive Soils contains: * Site investigation techniques for identification andclassification of expansive soils * Heave prediction methods using different types of data --withrigorous treatment of soil suction theory and measurement,oedometer tests, and more * Alternative design procedures for drilled pier and slab-on-gradefoundations, highway and airfield pavements * Treatment and chemical stabilization techniques --including salttreatment; moisture barriers; lime and cement stabilization; andother procedures * Remedial measures such as drainage control, and removal withreplacement and compaction control * Sample problems illustrating practical applications.
Download or read book Geotechnics for Developing Africa written by G.E. Blight and published by CRC Press. This book was released on 2021-07-01 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings represent a valuable reference on geotechnical problems peculiar to Africa and for engineering solutions to local problems. Topics covered are: Foundation engineering and lateral support; Methods of design and analysis; Monitoring, laboratory and field testing; Municipal, industrial and mining waste and environmental geotechnics; Soil improvement; Transportation geotechnics; Case studies.The proceedings are also an invaluable source of data on the properties of African soils, the properties of residual and tropical soils, as well as climate related problems.
Download or read book Unsaturated Soils written by José Fernando Thome Jucá and published by Taylor & Francis US. This book was released on 2002 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unsaturated materials comprise residua, collapsible and expansive naturally occurring soils, compacted soils and, more recently, residues of solid wastes. The engineering problems associated with unsaturated materials range from those related to conventional geotechnical works (e.g. foundations, pavements, slopes and excavations, retaining structures, earthdams, irrigation canals, tunnelling, compacted embankments) to those included in the environmental area (e.g. natural slope instability, erosion and subsidence processes, tailings, residues or solid waste disposal, contaminant transport, remediation of contaminant sites, engineered barriers for environmental protection, re-use of residues). This book, published in three separate volumes, comprises a selection of selected and invited papers presented at the Third International Conference on Unsaturated Soils – UNSAT ‘2002 – that took place in Recife, Brazil, form 10th to 13th March 2002. The book is of interest to consultants, researchers, practitioners, lecturers and students with a background in geotechnical engineering, environmental engineering and engineering geology.
Download or read book Expansive Soils written by Amer Ali Al-Rawas and published by Taylor & Francis. This book was released on 2006-06-08 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: Expansive Soils provides the reader with easy and specific access to problems associated with expansive soils, characterisitics and treatment, and evaluation and remediation. Set up with contributions from worlwide expert, this main reference guide is intended for engineers, researchers and senior students working on soil
Download or read book Introduction to Environmental Geotechnology written by Hsai-Yang Fang and published by CRC Press. This book was released on 2016-11-03 with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new edition of a bestseller presents updated technology advances that have occurred since publication of the first edition. It increases the utility and scope of the content through numerous case studies and examples and an entirely new set of problems and solutions. The book also has an accompanying instructor's guide and presents rubrics by which instructors can increase student learning and evaluate student outcomes, chapter by chapter. The book focuses on the increasing importance of water resources and energy in the broader context of environmental sustainability. It’s interdisciplinary coverage includes soil science, physical chemistry, mineralogy, geology, ground pollution, and more.
Download or read book Swelling Characteristics of Compacted Residual Clay Soils written by James B. Nevels and published by . This book was released on 1977 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
