Question 26 An unconfined compression test was conducted on a saturated clay sample with a diameter of 50 mm and a height of 100 mm. At the failure, the peak load was measured at 0.2 kN and the deformation at failure was 10.0 mm, calculate the unconfined compressive strength of the clay, qu =? (Unit: kPa Hint: apply an area correction) Your Answer: Answer CS Scanned with CamScanner

Question 26 An unconfined compression test was conducted on a saturated clay sample with a diameter of 50 mm and a height of 100 mm. At the failure, the peak load was measured at 0.2 kN and the deformation at failure was 10.0 mm, calculate the unconfined compressive strength of the clay, qu =? (Unit: kPa Hint: apply an area correction) Your Answer: Answer CS Scanned with CamScanner

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter10: Shear Strength Of Soil

Section: Chapter Questions

Problem 10.10P

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2. A series of consolidated, undrained triaxial tests were carried out on specimens of a saturated clay under no backpressure. The test data at failure are summarized: Confining Pressure (kPa) Deviator Stress (kPa) Pore Water Pressure (kPa) 150 192 80 300 341 154 450 504 222 a. Draw the Mohr circles and find the cohesion and friction angles in terms of effective stresses. b. Compute Skempton’s A-parameter at failure for all three specimens. c. Is the soil normally consolidated or overconsolidated? Why? d. Another specimen of the same clay that was consolidated under a cell pressure of 250 kPa was subjected to a consolidated, drained triaxial test. What would be the deviator stress at failure?
Assume that both a triaxial shear test and a direct shear test are to be performed on a sample of dry sand. When the triaxial shear test is performed, the specimen fails when the major and minor principal stresses are 80 and 20 lbs/in^2, respectively. When the direct shear test is performed, what shear strength can be expected if the normal stress is 4000 lbs/ft^2? Show all work.
Q.9 An unconfined compression test was conducted on an undisturbed sample of clay. The initial area of the specimen is 1105 mm?. The load at failure measured by the proving ring was 32N and axial strain at failure was 0.162. The undrained shear strength of the clay will be
Assume that both a triaxial shear test and a direct shear test are to be performed on a sample of dry sand. When the triaxial shear test is performed, the specimen fails when the major and minor principal stresses are 80 and 20 lbs/in^2, respectively. When the direct shear test is performed, what shear strength can be expected if the normal stress is 4000 lbs/ft^2?
A core sample of granite, 12 cm long and 6 cm in diameter, was tested in unconfined compression. The granite was known to have a modulus of elasticity of 16 x 10^3 MPa. a. At a pressure of 69 MPa, what would be the reduction in length of the sample b. At this pressure what would be the vertical load on the sample? c. At 69 MPa stress the core showed an increase in diameter of 0.011 mm. What is the Poisson's Ratio for the sample?
8. A cohesionless (c' = 0 kPa) soil specimen was subjected to a consolidated-undrained triaxial test. The total stress path, the deviator stress, and the pwp are shown in the figures below. No scale is intended in the figure of the stress path. a. Determine o'₁ and 0's at failure. [o'₁ = 345 kPa, o's= 140 kPa] b. Determine the effective friction angle (') of the soil. [$' = 25°] C. Determine the 'A' pore water pressure parameter at failure. [A+ = 0.29] 250 -Deviator Stress q (kPa), 200 150 100 50 200 p (kPa) Deviator stress or PW/P (kPa) 5 10 Vertical strain (%) ---PWP 15 20
Assume that both a triaxial shear test and a direct shear test are to be performed on a sample of dry sand. When the triaxial shear test is performed, the specimen fails when the major and minor principal stresses are 80 and 20lb/in2, respectively. When the direct shear test is performed, what shear strength can be expected if the normal stress is 4000 lb/ft2? Kindly get right answer with explaination steps
Data from the compression test on sample (i) is shown in Table 2. Plot thestress versus strain curve for this sample?
Question 10 A clay specimen was tested in undrained direct shear, under a normal stress of 50 kPa. The peak shear stress measured was 32 kPa and the critical state shear stress measured was 22 kPa. What is the critical state undrained strength of the clay specimen? Express your answer in kPa, but write only the numeric answer in the text box
An unconfined compression test was conducted on an undisturbed of clay. The sample has a diameter of 35.7 mm and was 75 mm long. The load at failure measured by the proving ring was 32 N and the axial deformation of the sample at failure was 14 mm the undrained shear strength of clay is kN/m².
(a) In an unconfined compression test on a saturated clay, the maximum proving ring dial reading recorded was 240x103 mm, when the axial shortening of the specimen having an initial height of 70 mm and an initial diameter of 36 mm, is 12 mm. If the calibration factor of the proving ring is 3.2 N/10³ mm, calculate the unconfined compressive strength and the undrained shear strength of the clay.
2- A three-axis compression test has been performed on the clay sample, which has been comprehensively and normally strengthened to a stress of 300 kPa and a specific volume of 200. The values of q and volumetric strain are measured at axial strain of 0, 2 and percent (rupture). The value of N is equal to 300 and Landa is equal to 0.2. Draw a diagram of all- round stress on the initial all-round stress in terms of slicing on the initial all-round stress:.