Download or read book Rapid Estimation of Compaction Parameters for Field Control written by TS. Nagaraj and published by . This book was released on 2006 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Compaction as a practical means of achieving the desired strength, compressibility, and permeability characteristics of fine-grained soils has been appreciated since the time early earth structures were built. In this paper, simple phenomenological relationships are proposed for estimating compaction characteristics, based on the analysis of compaction curves of fine-grained soils for different compactive efforts. A simple stepwise procedure is presented for adoption, the validity of which has been demonstrated from laboratory test data for this purpose.

Download or read book Unsaturated Soils Two Volume Set written by Eduardo E. Alonso and published by CRC Press. This book was released on 2010-09-02 with total page 1532 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent decades the development of unsaturated soil mechanics has been remarkable, resulting in momentous advances in fundamental knowledge, testing techniques, computational procedures, prediction methodologies and geotechnical practice. The advances have spanned the full spectrum of theory and practice. In addition, unsaturated materials exhibiting complex behaviour such as residual soils, swelling soils, compacted soils, collapsing soils, tropical soils and solid wastes have been integrated in a common understanding of shared behaviour features. It is also noteworthy that unsaturated soil mechanics has proved surprisingly fruitful in expanding to other neighbouring areas such as swelling rocks, rockfill mechanics, and freezing soils. As a consequence, geotechnical engineering involving unsaturated soils can be now approached from a more rational and systematic perspective leading towards an improved and more effective practice. Unsaturated Soils contains the papers presented at the 5th International Conference on Unsaturated Soil (Barcelona, Spain, 6-8 September 2010). They report significant advances in the areas of unsaturated soil behaviour, testing techniques, constitutive and numerical modelling and applications. The areas of application include soil-atmosphere interaction, foundations, slopes, embankments, pavements, geoenviromental problems and emerging topics. They are complemented by three keynote lectures and three general reports covering general issues of modelling, testing and applications. Unsaturated Soils is a comprehensive record of the state-of-the art in unsaturated soil mechanics and a sound basis for further progress in the future. The two volumes will serve as an essential reference for academics, researchers and practitioners interested in unsaturated soils.

Download or read book Assessment of Rapid Non nuclear Compaction Control Devices written by Ruth Elisheva Tobin and published by . This book was released on 2006 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: To ensure that compacted backfill performs as expected, compaction control is performed in the field by measuring the dry unit weight and moisture content of the compacted fill. The nuclear gauge is the most common device used to make these measurements because it is very rapid and thus does not delay the construction schedule. However, due to increased regulatory restrictions and growing concerns over the safety of using a device with a nuclear source, there is an increased effort to find a possible alternative to the nuclear gauge for compaction control. In this study, four devices were evaluated as potential replacements for the nuclear gauge. These devices include the Clegg Impact Hammer, the PANDA Dynamic Cone Penetrometer, the Moisture Density Indicator (MDI), and the Electrical Density Gauge (EDG). All the devices underwent laboratory testing conducted in large-scale soil specimens of poorly graded sand compacted to a target dry unit weight and moisture content. The MDI and EDG also underwent field testing at several different construction sites in central Texas. All testing includes comparisons between the results from the replacement devices and traditional compaction control devices. Analysis of the data revealed that, at this time, none of the four devices can be recommended to replace the nuclear gauge because they do not always accurately assess the compaction of the soil.

Download or read book Rapid determination of field properties of compacted materials written by and published by . This book was released on 1997 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Rapid Field Methods for Measuring Compacted Soil Properties written by W. B. Truesdale and published by . This book was released on 1967 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Rapid Method of Construction Control for Embankments of Cohesive Soil written by Jack W. Hilf and published by . This book was released on 1966 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modified Ohio s Curves written by Suksun Horpibulsuk and published by . This book was released on 2009 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Compaction curves from 16 coarse- and 9 fine-grained soils, which cover all soil types classified by the Unified Soil Classification System are analyzed to develop the Modified Ohio's curves. For all soils, the relationships between water content and degree of saturation on both the dry and the wet sides of optimum are represented by power functions. Their compaction curves under standard Proctor energy follow the Ohio's curves. Optimum degree of saturation, ODS, of coarse-grained soils is lower than that of fine-grained soils. However, for a given soil, the ODS is practically the same for different compaction energies, E. Even though compaction characteristics (optimum water content, OWC, and maximum dry unit weight, ?d max) are different for different soils, their relationship between normalized OWC/OWCst and E is practically the same, where OWCst is the OWC at standard Proctor energy. Based on this finding, the Modified Ohio's curves are introduced under compaction energy levels of the half standard, half modified, and modified Proctor energies. The verification of the Modified Ohio's curve is also illustrated in this paper. These curves are useful in rapid estimation of laboratory compaction curves from a single set data of dry unit weight and water content.

Download or read book Field Trials of Rapid Testing for Compaction Control research Project EW 5 written by Brickell, Moss & Partners (N.Z.) and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rapid Test Methods for Field Control of Highway Construction written by John D. Antrim and published by National Academy Press. This book was released on 1970 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research was conducted to determine the state of the art in the development, need, and use of rapid test methods. The first phase comprises a literature survey of current practices in quality control and acceptance testing, along with a study using statistical methods to assess the time limits for rapid tests. The second phase is concerned with the development and evaluation of new rapid test methods or principles to select those worthy of further investigation. thirty-eight state highway departments participated in the study, and interviews were conducted when appropriate. The second phase of the study applied to rapid test methods for asphalt content determination, compaction control, gradation of several types of aggregate, density of base course materials and soils, and moisture content. The results of all tests are appended.

Download or read book Performance Specifications for Rapid Highway Renewal written by Sidney Scott III and Linda Konrath and published by Transportation Research Board. This book was released on with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report from the second Strategic Highway Research Program (SHRP 2), which is administered by the Transportation Research Board of the National Academies, describes suggested performance specifications for different application areas and delivery methods that users may tailor to address rapid highway renewal project-specific goals and conditions.

Download or read book Rapid Determination of Relative Compaction Factors written by G. J. Hunter and published by . This book was released on 1984 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Soil Compaction Evaluation System for Rapid Field Measurement of Porosity Density Air Permeability and Cone Index written by Mark Thomas Morgan and published by . This book was released on 1988 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Estimation of Soil Compaction Parameters Based on Atterberg Limits written by Faizah Kamarudin and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Constructing and Controlling Compaction of Earth Fills written by Donald W. Shanklin and published by ASTM International. This book was released on 2000 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation Presents 22 papers, from the July 1999 symposium, written on the use of various standardized methods for specifying and controlling the compaction of soil for engineered constructed earth fills. Perspectives include the historical background, current state-of-the- art practices, case histories of challenging situations, concerns regarding appropriate design parameters for compaction control, and new methods to evaluate soil compaction and related qualities. Annotation copyrighted by Book News, Inc., Portland, OR.

Download or read book Deformation Characteristics of Geomaterials written by C.-K. Chung and published by IOS Press. This book was released on 2011 with total page 1382 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the international edition of the proceedings of IS-Seoul 2011, the Fifth International Symposium on Deformation Characteristics of Geomaterials, held in Seoul, South Korea, in September 2011.The book includes 7 invited lectures, as well as 158 technical papers selected from the 182 submitted. The symposium explored ideas about the complex load-deformation response in geomaterials, including laboratory methods for small and large strains; anisotropy and localization; time-dependent responses in soils; characteristics of treated, unsaturated, and natural geomaterials; applications in field methods; evaluation of field performance in geotechnical structures; and physical and numerical modeling in geomechanics. These topics were grouped under a number of main themes, including experimental investigations from very small strains to beyond failure; behavior, characterization and modeling of various geomaterials; and practical prediction and interpretation of ground response: field observation and case histories. Both the symposium and this book represent an important contribution to the exchange of advanced knowledge and ideas in geotechnical engineering and promote partnership among participants worldwide.

Download or read book Evaluation and Remediation of Low Permeability and Dual Porosity Environments written by Martin N. Sara and published by ASTM International. This book was released on 2002 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Field Evaluation of Compaction Monitoring Technology written by David J. White and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents an extensive field program carried out to identify the relationships between soil engineering properties, as measured by various in situ devices, and the results of machine compaction monitoring using prototype compaction monitoring technology developed by Caterpillar Inc. Primary research tasks for this study include the following: (1) experimental testing and statistical analyses to evaluate machine power in terms of the engineering properties of the compacted soil (e.g., density, strength, stiffness) and (2) recommendations for using the compaction monitoring technology in practice. The compaction monitoring technology includes sensors that monitor the power consumption used to move the compaction machine, an on-board computer and display screen, and a GPS system to map the spatial location of the machine. In situ soil density, strength, and stiffness data characterized the soil at various stages of compaction. For each test strip or rest area, in situ soil properties were compared directly to machine power values to establish statistical relationships. Statistical models were developed to predict soil density, strength, and stiffness from the machine power values. Field data for multiple test strips were evaluated. The R-2 correlation coefficient was generally used to assess the quality of the regressions. Strong correlations were observed between averaged machine power and field measurement data. The relationships are based on the compaction model derived from laboratory data. Correlation coefficients (R2) were consistently higher for thicker lifts than for thin lifts, indicating that the depth influencing machine power response exceeds the representative lift thickness encountered under field conditions. Caterpillar Inc. compaction monitoring technology also identified localized areas of an earthwork project with weak or poorly compacted soil. The soil properties at these locations were verified using in situ test devices. This report also documents the steps required to implement the compaction monitoring technology evaluated.