Author: Daniel P. LaGatta
Publisher:
ISBN:
Category : Clay
Languages : en
Pages : 234
Book Description
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).
Residual Strength of Clay and Clay-shales by Rotation Shear Tests
Author: Daniel P. LaGatta
Publisher:
ISBN:
Category : Clay
Languages : en
Pages : 234
Book Description
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).
Publisher:
ISBN:
Category : Clay
Languages : en
Pages : 234
Book Description
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).
Report on Residual Strength of Clay and Clay-shales by Rotation Shear Tests
Author: Daniel P. La Gatta
Publisher:
ISBN:
Category : Clay
Languages : en
Pages : 204
Book Description
Publisher:
ISBN:
Category : Clay
Languages : en
Pages : 204
Book Description
Engineering Properties of Clay Shales
Author: Frank C. Townsend
Publisher:
ISBN:
Category : Clay
Languages : en
Pages : 130
Book Description
This report compares various laboratory procedures and equipment used for determining the residual strength of clay shales. The effects of testing apparatus, specimen type, normal load, and rate of displacement on the residual strength of various clay shales were evaluated by relations between residual strength and Atterberg limits, grain size, and mineralogy were examined. (Modified author abstract).
Publisher:
ISBN:
Category : Clay
Languages : en
Pages : 130
Book Description
This report compares various laboratory procedures and equipment used for determining the residual strength of clay shales. The effects of testing apparatus, specimen type, normal load, and rate of displacement on the residual strength of various clay shales were evaluated by relations between residual strength and Atterberg limits, grain size, and mineralogy were examined. (Modified author abstract).
Effects of Specimen Type on the Residual Strength of Clays and Clay Shales
Author: PA. Gilbert
Publisher:
ISBN:
Category : Annular shear tests
Languages : en
Pages : 23
Book Description
This investigation was an examination of the effects of testing apparatus, specimen type and density, normal stress, and sequence of loading on the residual strength of various clays and clay shales. Annular shear and repeated direct shear tests were conducted on intact shale specimens with precut failure planes, while comparison rotational shear tests were conducted on the same shale material subjected to various degrees of remolding. Test results indicate that comparable residual strengths can be obtained, regardless of equipment type and procedure or degree of remolding. Supplemental annular shear tests on residual clay and silty sand show that precutting of the failure plane or the specimen density has no effect on the ?r' value. The residual friction angle is independent of stress history and normal load [when greater than 2 kg/cm2 (1.96 x 105 Pa)].
Publisher:
ISBN:
Category : Annular shear tests
Languages : en
Pages : 23
Book Description
This investigation was an examination of the effects of testing apparatus, specimen type and density, normal stress, and sequence of loading on the residual strength of various clays and clay shales. Annular shear and repeated direct shear tests were conducted on intact shale specimens with precut failure planes, while comparison rotational shear tests were conducted on the same shale material subjected to various degrees of remolding. Test results indicate that comparable residual strengths can be obtained, regardless of equipment type and procedure or degree of remolding. Supplemental annular shear tests on residual clay and silty sand show that precutting of the failure plane or the specimen density has no effect on the ?r' value. The residual friction angle is independent of stress history and normal load [when greater than 2 kg/cm2 (1.96 x 105 Pa)].
The Effect of Rate of Displacement on Measuring the Residual Strength of Clays
Author: Daniel P. LaGatta
Publisher:
ISBN:
Category : Clay
Languages : en
Pages : 35
Book Description
Rotation shear tests were performed with a device developed to measure residual shear strengths of clays clay shales, on annual specimens of remolded Bearpaw shale and remolded London clay. Rates of displacement in comparative tests, are expressed in peripheral velocities of the annular specimens. (Author).
Publisher:
ISBN:
Category : Clay
Languages : en
Pages : 35
Book Description
Rotation shear tests were performed with a device developed to measure residual shear strengths of clays clay shales, on annual specimens of remolded Bearpaw shale and remolded London clay. Rates of displacement in comparative tests, are expressed in peripheral velocities of the annular specimens. (Author).
Laboratory Shear Strength of Soil
Author: Ramond Nen Yong
Publisher: ASTM International
ISBN:
Category : Shear strength of soils
Languages : en
Pages : 721
Book Description
Publisher: ASTM International
ISBN:
Category : Shear strength of soils
Languages : en
Pages : 721
Book Description
Soil Specimen Preparation for Laboratory Testing
Author:
Publisher: ASTM International
ISBN:
Category : Soils
Languages : en
Pages : 353
Book Description
Publisher: ASTM International
ISBN:
Category : Soils
Languages : en
Pages : 353
Book Description
Clay and Shale Slope Instability
Author: William C. Haneberg
Publisher: Geological Society of America
ISBN: 0813741106
Category : Technology & Engineering
Languages : en
Pages : 160
Book Description
Ten papers address both empirical and analytical aspects of clay and shale slope instability. Among the topics discussed in detail are: limit equilibrium stability analysis, shear strength of clay and clayey colluvium, use of triaxial test data to evaluate viscoplastic slope movements, numerical modeling of pore pressure distribution in heterogeneous soils, rational analysis of rainfall and landslide movement patterns, the effects of hydrothermal alteration on slope stability, mudrock durability and stability considerations, and regional clay and shale slope stability problems in Italy.
Publisher: Geological Society of America
ISBN: 0813741106
Category : Technology & Engineering
Languages : en
Pages : 160
Book Description
Ten papers address both empirical and analytical aspects of clay and shale slope instability. Among the topics discussed in detail are: limit equilibrium stability analysis, shear strength of clay and clayey colluvium, use of triaxial test data to evaluate viscoplastic slope movements, numerical modeling of pore pressure distribution in heterogeneous soils, rational analysis of rainfall and landslide movement patterns, the effects of hydrothermal alteration on slope stability, mudrock durability and stability considerations, and regional clay and shale slope stability problems in Italy.
Study of Clay Shale Slopes Along the Panama Canal
Author: Don Charles Banks
Publisher:
ISBN:
Category : Clay
Languages : en
Pages : 562
Book Description
Prepared for Office, Chief of Engineers, U.S. Army, Washington, D.C. and the Panama Canal Company
Publisher:
ISBN:
Category : Clay
Languages : en
Pages : 562
Book Description
Prepared for Office, Chief of Engineers, U.S. Army, Washington, D.C. and the Panama Canal Company
Engineering Properties of Clay Shales
Author: William Heley
Publisher:
ISBN:
Category : Clay minerals
Languages : en
Pages : 116
Book Description
Publisher:
ISBN:
Category : Clay minerals
Languages : en
Pages : 116
Book Description