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Investigation Of Tensile Testing Of Compacted Soils
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Book Synopsis Investigation of Tensile Testing of Compacted Soils by : Mosaid M. Al-Hussaini
Download or read book Investigation of Tensile Testing of Compacted Soils written by Mosaid M. Al-Hussaini and published by . This book was released on 1974 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: The investigation reported herein describes the development of a hollow cylinder testing device and an indirect tensile testing device and the feasibility of using this equipment for determining the tensile properties of compacted cohesive soils. Hollow cylinder, indirect tensile, and double punch tests were conducted on compacted specimens of Vicksburg buckshot clay (CH), Vicksburg lean clay (CL), and a sandy clay mixture (SC) from Degray Dam. Unconfined compression tests were also conducted to provide comparative compressive properties of the materials. The test results showed that hollow cylinder tests produce the highest measured tensile strengths of comparable specimens, followed in decreasing order by indirect tensile and double punch tests, and that tensile strength increases as the plasticity of the soil increases. (Modified author abstract).
Book Synopsis Investigation of Tensile Testing of Compacted Soils by : Mosaid M. Al-Hussaini
Download or read book Investigation of Tensile Testing of Compacted Soils written by Mosaid M. Al-Hussaini and published by . This book was released on 1974 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Uniaxial Tensile Test for Soil by : Daniel A. Leavell
Download or read book Uniaxial Tensile Test for Soil written by Daniel A. Leavell and published by . This book was released on 1987 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are a number of applications where even a small amount of tensile strength can have significant influence on computational results and actual structure performance -- e.g. the tensile strengths of clays are significant in problems involving low mean normal stresses. Motivation for studying tensile strength comes indirectly from the study of partially saturated soils, as the tensile strength is presumably derived from the suction potential of the soil. This report describes an apparatus for measuring strength of soil in direct tension. Data are presented for compacted Vicksburg silty clay for uniaxial tension and unconsolidated undrained (Q) compression tests with a view toward proposing criteria to relate tensile and compressive strengths for partially saturated materials. The primary advantage of the apparatus is its ability to apply a uniaxial load through precisely aligned end-grips, which are restricted from rotations about the long axis of the specimen. This design is in contrast to tensile tests for rock and concrete that avoid applying moments to specimen ends by attaching the end-grips to a flexible pulling mechanism. A flexible loading mechanism was viewed as unsuitable for brittle low-strength compacted soils because of difficulties in achieving precise loading alignment. Precise alignment for the tensile device is achieved by mounting one of the end-grips on a commercially available slide table that restricts movement to one direction. A major finding of the laboratory investigation was that of all methods used to determine tensile properties, the highest strength and stiffness was obtained from the direct tensile device.
Download or read book Foundations & Earth Structures written by and published by . This book was released on 1986 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Unsaturated Soil Mechanics by : Tom Schanz
Download or read book Experimental Unsaturated Soil Mechanics written by Tom Schanz and published by Springer Science & Business Media. This book was released on 2007-06-02 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings are a continuation of the series of International Conferences in Germany entitled "Mechanics of Unsaturated Soils." The objective is to discuss and understand unsaturated soil behaviour, so that engineered activities are improved in terms of judgement and quality. In addition to knowledge of classical concepts, it is a challenge to adapt convincing new concepts and present them in such a way that they can be used in engineering practices.
Book Synopsis Tensile Testing of Soils by : Mosaid M. Al-Hussaini
Download or read book Tensile Testing of Soils written by Mosaid M. Al-Hussaini and published by . This book was released on 1973 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tensile stresses may exist in many engineering structures, such as rigid and flexible pavements, and within dams and embankments. The existence of tensile stresses in these structures is not harmful; however, these stresses generate tensile strains and if the failure tensile strain is exceeded, the integrity of the structure might be threatened. Most previous research concerned with the behavior of materials under tensile stress has been conducted on brittle materials, such as concrete and rock, while materials such as soils have received little or no attention. Three factors can be considered as the major contributors to this neglect: (a) stability analysis and design practice assume soil to resist compression and shear only, (b) lack of adequate theory which can describe soil behavior under tension with reasonable accuracy, and (c) reliable testing devices which can impose and measure tensile stress and strain have not yet been developed. While information on the tensile behavior of soils is lacking, there exists a relatively large amount of data on the tensile strength of brittle materials as discussed in this report. (Modified author abstract).
Book Synopsis Tensile Properties of Compacted Soils by : M. Al-Hussaini
Download or read book Tensile Properties of Compacted Soils written by M. Al-Hussaini and published by . This book was released on 1981 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: This investigation describes the development of a hollow cylinder testing device and the feasibility of using this equipment for determining the tensile properties of compacted cohesive soils. Hollow cylinder tests were conducted on compacted specimens of Vicksburg buckshot clay (CH), Vicksburg lean clay (CL), and a sandy clay mixture (SC) from DeGray Dam. Unconfined compression tests and indirect tension tests were also conducted to provide comparative compressive properties of the materials.
Author :United States. Federal Highway Administration. Offices of Research and Development Publisher : ISBN 13 : Total Pages :346 pages Book Rating :4.3/5 (91 download)
Book Synopsis Report No. FHWA-RD. by : United States. Federal Highway Administration. Offices of Research and Development
Download or read book Report No. FHWA-RD. written by United States. Federal Highway Administration. Offices of Research and Development and published by . This book was released on 1980 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Relationship Between Tensile and Compressive Strengths of Compacted Soils by : DA. Leavell
Download or read book Relationship Between Tensile and Compressive Strengths of Compacted Soils written by DA. Leavell and published by . This book was released on 1988 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: A direct-pull tension test was developed to study the behavior of compacted soils in total stress tension. A comprehensive series of tension and unconsolidated undrained compression tests was performed on Vicksburg silty clay; the data from these tests were supplemented with published data. Analysis of the data was based on relating the tensile strength parameter of the Griffith-Brace theory for brittle fracture to the suction-derived cohesion term of the Fredlund-Morgenstern failure law for partially saturated soils. Application of the analysis was demonstrated by relating tensile and compressive strengths to water content and void ratio.
Book Synopsis Uniaxial Tensile Test for Soil by : Daniel A. Leavell
Download or read book Uniaxial Tensile Test for Soil written by Daniel A. Leavell and published by . This book was released on 1987 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advanced Triaxial Testing of Soil and Rock by : Robert T. Donaghe
Download or read book Advanced Triaxial Testing of Soil and Rock written by Robert T. Donaghe and published by ASTM International. This book was released on 1988 with total page 896 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Although the triaxial compression test is presently the most widely used procedure for determining strength and stress-deformation properties of soils, there have been no books published on triaxial testing since the 1962 second edition of the landmark work The Measurement of Soil Properties in the Triaxial Test by Bishop and Henkel. It is apparent there is a need to document advances made in triaxial testing since publication of Bishop and Henkel's book and to examine the current state of the art in a forum devoted solely to triaxial testing. Because of increasing versatility brought about by recent developments in testing techniques and equipment, it is also important that the geotechnical profession be provided with an up-to-date awareness of potential uses for the triaxial test."--Overview.
Book Synopsis Soil Compaction Investigation by : Waterways Experiment Station (U.S.)
Download or read book Soil Compaction Investigation written by Waterways Experiment Station (U.S.) and published by . This book was released on 1950 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Tensile Strength of Unsaturated Soils by : Penghai Yin
Download or read book Tensile Strength of Unsaturated Soils written by Penghai Yin and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Desiccation-induced soil cracking is of significant interest in several engineering disciplines, which include geotechnical and geoenvironmental engineering, mining engineering, and agriculture engineering. The hydraulic, mechanical, thermal and other physico-chemical properties of unsaturated soils can be predominantly influenced due to cracks. Reliable information of these properties is required for the rational design and maintenance of earth structures taking account of the influence the soil-atmosphere interactions (e.g., for expansive soil slopes, earth dams, and embankments). In spite of significant research studies published in the literature on the desiccation-induced cracks during the past century, the fundamental mechanism of crack initiation and propagation of soils induced by drying and shrinkage is still elusive. For this reason, the focus of this thesis is directed towards understanding the tensile strength of unsaturated soils which is associated with soil crack initiation criterion (i.e. maximum tensile stress criterion). Tensile strength is the key property of soils for interpreting the initiation of soil cracking from a macroscopic point of view. A semi-empirical model is proposed for predicting the tensile strength of unsaturated cohesionless soils taking into account the effect of both the negative pore-water pressure in saturated pores and the air-water interfacial surface tension in unsaturated pores. The proposed model is calibrated and validated by providing comparisons between the model predictions and the experimental measurements on 10 cohesionless soils (i.e. five sandy soils and five silty soils) published in the literature. The proposed model is simple and requires only the information of Soil-Water Characteristic Curve (SWCC) and Grain Size Distribution curve (GSD), which can be obtained from conventional laboratory tests. To investigate the influence of microstructure, a practical and reliable estimation approach for predicting the evolution of the microstructural void ratio of compacted clayey soils subjected to wetting and drying paths is proposed. The microstructural evolution of 13 examined soils were investigated quantitatively using the mercury intrusion porosimetry (MIP) results. The investigated soils include four high-plasticity clays, eight low-plasticity clays and a glacial till which is a relatively coarse-grained soil with some fines. Based on this study, a novel criterion has been developed for identifying different pore populations of compacted clayey soils. The "as-compacted state line" (ACSL) was proposed to estimate the initial microstructural void ratio based on the compaction water ratio. A constitutive stress is derived to interpret and predict the volumetric deformation of compacted clay aggregates. The linear elastic constitutive model is used for predicting the microstructural void ratio of the examined compacted soils following monotonic wetting and drying paths. The developed approach (i.e. the ACSL and the linear elastic constitutive model) is validated by providing comparisons between the predicted and interpreted microstructural void ratios for all the examined soils. In addition to the matric suction and microstructure, the confining pressure also influences the tensile strength of unsaturated compacted clayey soils. The tensile strength tests on a compacted clayey soil by both the direct method (i.e. triaxial tensile test) and the indirect method (i.e. Brazilian split test) were performed. It is found that the tensile strength increases as the compaction water content decreases for the range investigated in this study, which could be explained by the variation of the inter-aggregated capillary bonding force and the change in microstructure. The increase in the confining pressure has been found to induce the change in failure mode (i.e. from pure tensile failure mode to combined tensile-shear failure mode). In spite of limitations associated with the Brazilian split test, tensile strength is widely determined using this test due to the simple procedure of specimen preparation and wide availability of test equipment in conventional laboratories. However, the Brazilian tensile strength is found to overestimate the tensile strength of compacted specimens with water content greater than the plastic limit. This is due to the considerable plastic deformation associated with the ductile failure instead of brittle failure. In summary, this thesis is devoted to providing insight into the fundamental mechanisms associated with the desiccation-induced crack initiation by quantitatively investigating the various factors that influence the tensile strength of unsaturated soils, which include the matric suction, the microstructure, and the confining pressure from theoretical studies and laboratory investigations.
Book Synopsis List of Publications of the U.S. Army Engineer Waterways Experiment Station by : U.S. Army Engineer Waterways Experiment Station
Download or read book List of Publications of the U.S. Army Engineer Waterways Experiment Station written by U.S. Army Engineer Waterways Experiment Station and published by . This book was released on 1976 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laboratory Testing of Soils, Rocks, and Aggregates by : Nagaratnam Sivakugan
Download or read book Laboratory Testing of Soils, Rocks, and Aggregates written by Nagaratnam Sivakugan and published by J. Ross Publishing. This book was released on 2011 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contains virtually all current laboratory tests for soils, rocks and aggregates in one volume with references to international standards: ASTM, ISRM, BS, and AS.
Book Synopsis Unsaturated Soils: Research & Applications by : Nasser Khalili
Download or read book Unsaturated Soils: Research & Applications written by Nasser Khalili and published by CRC Press. This book was released on 2014-06-05 with total page 1850 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unsaturated Soils: Research and Applications contains 247 papers presented at 6th International Conference on Unsaturated Soils (UNSAT2014, Sydney, Australia, 2-4 July 2014). The two volumes provide an overview of recent experimental and theoretical advances in a wide variety of topics related to unsaturated soil mechanics: - Unsaturated Soil Behavior - Experimentation - Modelling - Case Histories - Geotechnical Engineering Problems - Multidisciplinary and New Areas Unsaturated Soils: Research and Applications presents a wealth of information, and is of interest to researchers and practising engineers in soil mechanics and geotechnical engineering. These proceedings are dedicated to Professor Geoffrey E. Blight (1934-2013), who passed in November 2013.
Book Synopsis Theoretical Aspects and Measurement of Tensile Strength in Unsaturated Soils by : Victor Abram Snyder
Download or read book Theoretical Aspects and Measurement of Tensile Strength in Unsaturated Soils written by Victor Abram Snyder and published by . This book was released on 1980 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
