Download or read book Strength of Highly Plastic Clays written by Arthur Casagrande and published by . This book was released on 1959 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Limitations of Laboratory Shear Strength in Evaluating Stability of Highly Plastic Clays written by R. Peterson and published by . This book was released on 1960 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Mechanics for Unsaturated Soils written by Delwyn G. Fredlund and published by John Wiley & Sons. This book was released on 1993-09-06 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt: The principles and concepts for unsaturated soils are developed as extensions of saturated soils. Addresses problems where soils have a matric suction or where pore-water pressure is negative. Covers theory, measurement and use of the fundamental properties of unsaturated soils--permeability, shear strength and volume change. Includes a significant amount of case studies.
Download or read book Characterization of the Swelling Properties of Highly Plastic Clays Using Centrifuge Technology written by Jorge G. Zornberg and published by . This book was released on 2009 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Strength of undisturbed Clay Determined from Undrained Tests written by Charles Cushing Ladd and published by . This book was released on 1963 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Water Content and Density on the Strength and Deformation Behavior of Clay Soils written by John Paul Malizia and published by . This book was released on 2016 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt: Clays are used widely in sanitary landfills, embankment dams, highway embankments, hydraulic barriers, and foundations. In most of these applications, clays are compacted at maximum dry density (MDD) and optimum water content (OWC). Density and water content have a profound effect on the strength and deformation behavior of compacted clays. However, this effect has not been quantified in detail, especially the water content at which transition from brittle to plastic behavior occurs for low, medium, and high plasticity clays. The objective of this research was to investigate the effect of varying water content and density on the strength and deformation behavior of low, medium, and high plasticity clays, and to quantify the transition water content between brittle and plastic behavior for each type of clay. Initially, six samples each of low, medium, and high plasticity clays were compacted, three on the dry side and three on the wet side of OWC, to establish their compaction curves. The compacted samples were failed axially under unconfined compression and were visually inspected to determine the water content at which transition occurred between brittle and plastic deformation. Additionally, three samples of each type of clay were compacted at different water contents and failed using the direct shear test. The stress-strain curves from both tests were used to determine the transition water content between brittle and plastic behaviors. The MDD values for low, medium, and high plasticity clays were found to be 102.5 lb/ft3 (1.64 Mg/m3), 95 lb/ft3 (1.52 Mg/m3), and 89.5 lb/ft3 (1.43 Mg/m3), with the corresponding OWC values of 18%, 25%, and 27%, respectively. The compressive strength values for the low, medium, and high plasticity clays at MDD and OWC were 54 psi (344.8 kPa), 59 psi (413.8 kPa), and 60 psi (420.7 kPa), respectively. The unconfined compressive strength first increased and then decreased with increasing water content, with the change in trend occurring within 5% of OWC for each type of clay. The high plasticity clay had the highest cohesion while the low plasticity clay had the highest friction angle. The transition between brittle and plastic behavior for the low, medium, and high plasticity clays occurred between 19-20%, 27-29%, and 30-32% water content, respectively. This study was aimed at determining the transition water content as it relates to both brittle and plastic deformation. Earthquakes can cause failure of embankment dams in the form of cracking due to displacements or differential settlements from the vibrations. To prevent such failures from occurring, a homogenous embankment dam consisting of low plasticity clay (CL) or the clay core of a zoned embankment dam, must be compacted so that the clay material behaves more like a plastic material, i.e. deforms without a well developed failure plane. This study shows that, to ensure structural integrity of embankment dams in seismically active areas, the clay should not only be compacted wet of the OWC, but also on the wet side of the transition water content marking the boundary between brittle and plastic deformations.
Download or read book Residual Strength of Clay and Clay shales by Rotation Shear Tests written by Daniel P. LaGatta and published by . This book was released on 1970 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objectives of this investigation were to develop a rotation shear machine to measure the residual shear strength (constant shearing resistance at which material undergoes continuous deformation under a constant state of effective stress) of clays and clay-shales; investigate testing errors; and measure residual shear strengths of representative types of highly plastic clays and clay-shales. In the rotation shear test, torque is applied to the bottom of the specimen and two force transducers measure the couple necessary to maintain the upper half of the specimen stationary. Disc-shaped or annular specimens with thicknesses from 0.1 to 2.5 cm and outside diameters of 7.11 cm can be tested. Variations in residual shear strength were investigated for normally consolidated versus overconsolidated specimens, for specimens sheared at different rates of peripheral displacement, and for specimens prepared by several different remolding procedures. (Author Modified Abstract).
Download or read book Effects of Salt Content and Adsorbed Cations on the Shear Strength of a Remoulded Highly Plastic Clay Soil written by Stanley Thomson and published by . This book was released on 1963 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation of Thixotropy in Highly Plastic Clays written by Morris Dee Swensen and published by . This book was released on 1966 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study was made to establish the effect of thixotropy on a specified clay and to determine if a means could be established where thixotropy can be predicted and then used in design. A review was made of the theories of thixotropy and how the strength increases takes place. Investigations performed by other authors were reviewed and their conclusions on the feasibility of using thixotropic strength increase in design was discussed. Two clays were used in the study. Each was prepared at three different water contents near the liquid limit. The samples were placed in two types of containers and stored under water. Shear strength is affected by changes in water content; therefore a secondary study was to detemine the effectiveness of the methods used to control the water content of the stored samples. Samples were stored a maximum of 150 days. Tests were made at specified times during this period to determine the strength increase that developed with time. It was found that the strength increase of the clays tested could be defined by an equation. The accuracy of the equation was not determined for all water contents but only those used in the study. (Author).
Download or read book The Influence of Strain on the Shear Strength Parameters of a Highly Plastic Preconsolidated Homionic Clay Soil written by Garry Robin Gilchrist and published by . This book was released on 1967 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Variation of Atterberg Limits in Relation to Strength Properties of a Highly Plastic Clay written by Jagdish Narain and published by . This book was released on 1967 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Clays Their Occurrence Properties and Uses written by Heinrich Ries and published by Рипол Классик. This book was released on 1927 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt: First edition (First thousand).
Download or read book The Influence of Strain on the Shear Strength Parameters of a Highly Plastic Remoulded Homionic Clay Soil written by Alden Ernie Dahlman and published by . This book was released on 1965 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Factors Affecting the Long Term Strength of Compacted Beaumont Clay written by Roger Green and published by . This book was released on 1986 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes results of an ongoing study of the stability of embankments constructed of highly plastic clays in Texas. Previous studies showed that such embankments failed by sliding many (10-30) years after construction and that the apparent shear strengths were substantially lower that the long-term shear strengths determined on the basis of laboratory tests on compacted specimens. This report presents the finding of several series of tests performed to understand better the reasons for the discrepancies between field and laboratory shear strengths. Triaxial shear tests were performed to measure the effective stress shear strength parameters on (a) undisturbed specimens taken from actual slopes which had failed, (b) specimens prepared by consolidating soil from a slurry in the laboratory, and (c) specimens prepared by packing (remolding) soil into a special mold in the laboratory. In addition, residual shear strengths were determined on conventional compacted specimens.
