Download or read book A Study of the Undisturbed Remolded and Artificially Sedimented Shear Strength Properties of an Alluvial Clay written by Wayne D. Smith and published by . This book was released on 1976 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2013-11-21 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and dis seminated by the Center for lnformation and Numerica/ Data Analysis and Synthesis (C/NDAS) * at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the ac tivity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficia! to the academic and general scientific and technical community. After fi ve years of this joint undertaking we had concluded that it was in the interest of ali concerned if the printing and distribution of the volume were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and App/ied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. Ali back issues can also be ordered from Plenum. We have reported in Volume 21 (thesis year 1976) a total of 10,586 theses titles from 25 Canadian and 219 United States universities. We are sure that this broader base for theses titles reported will greatly enhance the value of this important annual reference work.

Download or read book The Shear Strength Properties of an Undisturbed Clay in Extension written by Jerold Alan Baird and published by . This book was released on 1971 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of the Consolidation and Shear Strength Characteristics of Two Clay Minerals written by Murl Harry Webster and published by . This book was released on 1959 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Study of the Shear Strength Characteristics of Undisturbed Saturated Clays written by Iraj Norrany and published by . This book was released on 1963 with total page 444 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 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 A Study of the Shear Strength of Normally Consolidated Ecuadorian Varved Clay and Its Sensitivity to Remolding written by James Andrew Ball and published by . This book was released on 1977 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Consolidated-undrained (CU) triaxial compression tests, with pore pressure measurement, were employed in the study of the shear strength characteristics or normally consolidated varved clay from Guayaquil, Ecuador. Undisturbed samples were tested to obtain values of undrained shear strength, the effective stress envelope, stress-strain relationships and pore pressure build up. The mineralogical composition of the samples was determined through X-ray Diffraction and Thermogravimetric Analysis techniques. CU tests for remolded samples provided data for a comparison of undrained shear strengths and an evaluation of sensitivity.

Download or read book Investigation of the Structure and Shear Strength Characteristics of a Clay Soil written by Roger David Goughnour and published by . This book was released on 1961 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Canadian Geotechnical Journal written by National Research Council Canada and published by . This book was released on 1999 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Behavior of a Remolded Silty clay Subjected to Sequential Loading written by Lawrence Tsi-Ching Chung and published by . This book was released on 1970 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The investigation was undertaken to determine shear strength and pore pressure parameters of a soil when subjected to sequential loading. This method is intended to similate the in-situ condition of stress application under certain field conditions. The testing procedure, a sequential triaxial shear test, is described. This test consists of successive stages of partial consolidation followed by undrained shear. Triaxial consolidation and shear strength characteristics of a sedimented remolded silty-clay are compared with the results from conventional tests on isotropically consolidated samples. The undrained strength was found to be a function of moisture content, irrespective of the method of test and initial stress system for the normally consolidated soil. A unique relationship was established between a pore pressure parameter, the ratio of the change in pore pressure to the effective vertical consolidation pressure, and undrained strength. It is concluded that this sequential procedure of testing does change the strength characteristics of the soil. These cannot be predicted from the conventional test"--Abstract, page ii.

Download or read book An Investigation of the Shear Characteristics of Fargo Clay written by V. Venkatasubramanian and published by . This book was released on 1948 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Determination of Consolidated drained Shear Strength of Undisturbed Lakebed Clays from Consolidated undrained Triaxial Tests written by Ronald S. Lech and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The conventional procedure for determining the drained shear strength of a soil is by performing a strain-controlled undrained triaxial test and using the pore-pressure measurements to determine the effective stress parameters. The ability of this standard test to predict the drained strength is evaluated by comparing drained, undrained, stress-controlled, and strain-controlled triaxial tests. All the tests were performed on reasonably uniform samples of lakebed clay. The results of this research indicate that the standard practice of obtaining the drained strength of a soil from a consolidated undrained triaxial test is valid. The drained strength determined in this research is slightly lower than the undrained strength. This difference is attributed to the slower rate of shear used in the drained test. The shear strength determined by strain-controlled and stress-controlled triaxial tests is also evaluated. The results of this research indicate that the method of applying load to the specimen does not significantly affect the shear strength. It is concluded that the strain-controlled test is the better method since it is easier to conduct.

Download or read book Changes in Clay Swelling and Shear Strength Properties with Different Sample Preparation Techniques written by MF. Attom and published by . This book was released on 2001 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper presents the effect of compaction methods on soil swell pressure, unconfined compressive strength, and swell potential of three types of soils in Jordan. Undisturbed and disturbed soil samples were collected from the field and used for this study. Compacted soil specimens were prepared using dynamic compaction, static compaction, and kneading compaction. Swell potential test, swelling pressure test, and unconfined compression test were conducted on identical samples compacted by different methods, and having similar initial conditions to the undisturbed samples. Other sets of experiments were also conducted to examine the influence of initial water content on swell pressure and unconfined compressive strength under different compaction techniques. Results indicated that the undisturbed samples have the highest swelling pressure and swell potential values followed by dynamic compaction, while kneading compaction gave the lowest values for the three soils. For the same soil, it has been found that the swelling pressures of the undisturbed samples were 1.5, 1.96, and 3.07 times of that for the dynamic, static, and kneading compaction, respectively. Similar trends were obtained with regard to unconfined compressive strength and swell potential. The unconfined compressive strengths of the undisturbed samples were 1.35, 1.6, and 2.53 times higher than that of the soil specimen compacted according to the dynamic, static, and kneading procedures, respectively.

Download or read book Strength Loss and Softening of Sensitive Clay Slopes written by Dong Soon Park and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Strength loss and strain softening/localization are important issues for sensitive clay slopes. There is a question that if the ground moves a fraction of a meter due to earthquake shaking, sensitive clays would be just as easily remolded and trigger a catastrophic failure. Two possible reasons why we expect different relationships between deformation and strength loss are: seismic (dynamic) failure mechanisms are different from gravity driven (static) failure mechanisms, and rate dependent shear strength hinders localization of deformations into distinct shear planes. In this dissertation, a literature review is performed to understand prior research on the behavior of sensitive clay slopes subjected to static and dynamic loading. Then, as a part of effort to simulate sensitive clay behavior with simplicity and accuracy, two constitutive models - rate-independent and rate-dependent sensitive clay models are developed. As an experimental approach, a construction technique to create sensitive clay in laboratory is also developed using a weak cement mix. In terms of repeatability and workability, physical modeling for artificially sensitive clay is valuable. The effects of sensitivity and earthquake intensity on the instability and deformation of slopes were studied using 12 centrifuge tests for cement treated clay slopes. Additional laboratory tests were performed to find material properties and static/dynamic behavior of artificially sensitive clays. Based on physical modeling and laboratory tests, shear band thickness is governed by sensitivity, strain rate, and test conditions. Regarding the behavior of sensitive clay slopes, two different counterbalancing effects exist together. One is the effect of strain softening and initial stiffness. Strain softening of sensitive clay tends to make soil deformation bigger, but higher stiffness of earlier stage of loading for sensitive clay hinders the amount of deformation. Therefore, the importance of strain level and corresponding mobilized strength should be highlighted when comparing the performance of sensitive and insensitive clay slopes. Only after remolding at large strains might we expect insensitive clays to perform better than weakly cemented sensitive clays. Sensitive clay slopes can suffer catastrophic failure if they are deformed enough to destroy their structure. The other counterbalancing effect exists between strain rate and strain softening. Strain rate effect may be an important parameter to affect how fast strain is localized. Faster strain rate (such as dynamic loading in centrifuge test) leads to higher strength. Then, the thickness of shear band tends to increase in terms of strain rate because larger shear bands develop smaller strain rates and smaller strengths. Hence, the rate effect hinders strain localization. However, because of strain softening, shear bands tend to localize as strain increases. Therefore, two competing effects exist together and there might be a rate-dependent optimal shear band thickness. Thus, it is crucial to account for the level of shear strain of concern. Depending on the shear strain level, mobilized strength can be different. Accordingly, mobilized strength is affected by the rate of softening and the rate of strain. Counteracting effects summarized above can explain different aspects of static and dynamic as well as laboratory and field scale shearing behavior of sensitive clay slopes.

Download or read book The Influence of Remolding Soil on Mobility Problems written by Louis J. Goodman and published by . This book was released on 1960 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effect of Anisotropy and Reorientation of Principal Stresses on the Shear Strength of Saturated Clay written by James Michael Duncan and published by . This book was released on 1965 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objectives of the investigation are to establish the fundamental nature of the anisotropy of saturated clays with respect to undrained strength, and to evaluate the practical significance of anisotropy and reorientation of the principal stresses in short-term stability problems. (Author).