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Triaxial Shear Behavior of Cemented Sand-Gravel Mixtures
Review of the technical literature shows a number of research papers and experimental studies dealing with investigation of the shear behavior of well-graded cemented soils. In the present study, shear strength characteristics of poorly graded sand-gravel mixtures are investigated using large-scale triaxial compression tests. Tested soil consists of uniform sand mixed with 30 percent of uni-sized gravel particles with a maximum grain size of 12.5 mm. Samples were cemented by addition of Portland cement in four weight percentages (0, 1, 2 and 3%). Samples were then cured for seven days in humid conditions. All specimens were prepared at a constant relative density of 70% and were tested at three different confining pressures (50, 100 and 150 kPa) in both consolidated drained and consolidated undrained conditions. Deviatoric stress-axial strain curves - besides volumetric strain-axial strain ones in drained condition and pore pressure-axial strain curves in undrained condition - were determined during loading process. According to the results, an increase in cement content increased peak strength, ultimate dilation and negative suction of cemented samples. A comparison of test data on poorly graded cemented mixture with previous experimental results on well-graded, cemented. gravelly sand indicated lower peak shear strength for cemented, poorly-graded mixture.
Triaxial Shear Behavior of Cemented Sand-Gravel Mixtures
Review of the technical literature shows a number of research papers and experimental studies dealing with investigation of the shear behavior of well-graded cemented soils. In the present study, shear strength characteristics of poorly graded sand-gravel mixtures are investigated using large-scale triaxial compression tests. Tested soil consists of uniform sand mixed with 30 percent of uni-sized gravel particles with a maximum grain size of 12.5 mm. Samples were cemented by addition of Portland cement in four weight percentages (0, 1, 2 and 3%). Samples were then cured for seven days in humid conditions. All specimens were prepared at a constant relative density of 70% and were tested at three different confining pressures (50, 100 and 150 kPa) in both consolidated drained and consolidated undrained conditions. Deviatoric stress-axial strain curves - besides volumetric strain-axial strain ones in drained condition and pore pressure-axial strain curves in undrained condition - were determined during loading process. According to the results, an increase in cement content increased peak strength, ultimate dilation and negative suction of cemented samples. A comparison of test data on poorly graded cemented mixture with previous experimental results on well-graded, cemented. gravelly sand indicated lower peak shear strength for cemented, poorly-graded mixture.
Triaxial Shear Behavior of Cemented Sand-Gravel Mixtures
Amini, Younes (author) / Hamidi, Amir (author)
Geo-Shanghai 2014 ; 2014 ; Shanghai, China
Soil Behavior and Geomechanics ; 76-83
2014-05-05
Conference paper
Electronic Resource
English
Triaxial Shear Behavior of Cemented Sand-Gravel Mixtures
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