A set of sandstones plugs from the Vicksburg formation in South Texas gave the following results (Dry conditions, assume ps = 2.65 g/cm3): Diameter: 25.30 mm, 24.90 mm, 25.10 mm Length: 50.30 mm, 50.05 mm, 49.96 mm Weight = 52.1 ± 0.1 g What is the porosity of the sandstone? What is the expected error in porosity?

A set of sandstones plugs from the Vicksburg formation in South Texas gave the following results (Dry conditions, assume ps = 2.65 g/cm3): Diameter: 25.30 mm, 24.90 mm, 25.10 mm Length: 50.30 mm, 50.05 mm, 49.96 mm Weight = 52.1 ± 0.1 g What is the porosity of the sandstone? What is the expected error in porosity?

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 10.20P

See similar textbooks

Similar questions

4. The uniaxial compressive strength test is done on a cylindrical rock specimen with diameter of 60 mm and length of 120 mm. The load- deformation diagram of this specimen is shown on the following figure. Determine the uniaxial compressive strength and the secant Young modulus (E50) of this rock. 80000 70000 60000 50000 40000 30000 20000 10000 0.5 1 1.5 Deformation (mm) Load (N) 2.
A dry sandstone sample of diameter 22 mm and length 35 mm weighs 32 g. the sample is crushed and a pycnometer is used to estimate the grain density having the following date: W3 = 91 g and W4 = 72 g. determine the grain density of sandstone and porosity of the sample.
Given the following lab data, calculate the pore volume compressibility for a sandstone sample at 4,000 and 6,000 psi. Pore volume of the sandstone sample is 50 cm3. Pressure, psi Vol. fluid expelled, cm3 1000 0.244 2000 0.324 3000 0.392 4000 0.448 5000 0.5 6000 0.546 7000 0.596 8000 0.63
STATEMENTS: A - an increase in volume is expected in 2:1 expanding type of clay when wet/saturated with water. B - cracking is expected when an expanding type of clay dries. A- both statements are trueB- neither statements are trueC- only statement A is true D- only statement B is true
A specimen of rock was subjected to a compressive force of (10 kN) which tends an axial deformation was equal to (0.01 mm) and lateral deformation was of (0.001 mm). If the sample dimensions (length 80 mm and diameter 40 mm), find: Axial strain, Lateral strain, Volumetric strain, Young's Modulus (kN/m²), Bulk Modulus (kN/m) and Shear Modulus (kN/m2).
A crushed rock has a Gs = 2.68. In the loose state the porosity is 46% and when the porosity compacted is 20%. Compute the ratio of compacted volume to loose volume.
a）For clays, the failure line (one that connects the peak failure stresses) in the normally consolidated range does not have a cohesion intercept, whereas the failure line in the overconsolidated range has a cohesion intercept. T or F B）During the shearing phase of a CU test, the void ratio of a NC consolidated clay specimen will: 1 decrease. 2 could increase or decrease. 3 remain a constant. 4 increase. C)What does the cohesion (that appears in the Mohr-Coulomb criterion) of OC clays depend on? 1the preconsolidation pressure. 2whether the failure stresses are total or effective. 3the soil type. 4everything listed here.
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?
Prove the relationship between porosity and void ratio
Given a depth of burial of 10 kilometers, the density of 2.65 g/cm3, lithostatic stress to be 2.36 kilobar at normal temperature. dimension of granite is at its normal dimension. What is the dimension of the cubical granite at increased temperature having an increase in lithostatic stress to be 2.86 kilobars when temperature increases? The depth of burial is still the same.
A given saturated clay is known to have effective strength parameters of c' = 10 kPa and = 28°. A sample of this clay was brought to failure quickly so that no dissipation of the pore water pressures %3D could occur. At failure it was known that o KPa, o = 10 KPa and = 20 kPa. %3D (a) Estimate the values of o, and oz at failure (b) Use the Mohr circle to illustrate the effective stress and total failure stress.
QUESTION 4aTo use rock in engineering applications, certain properties of the rock mass must be assessed to reasonably predict performance in the as-built condition. Discuss the following in the field of rock performance i. Discontinuityii. Elastic deformationiii. Plastic deformation