A sandstone rock specimen is 82 mm in diameter and 169 mm long whose mineralogic structure is composed of quarts and feldspar grains with calcite cement. At saturated state, its wet weight is 21.42 N; after oven drying its weight is 20.31 N. Calculate its wet unit weight, its dry unit weight (both in kN/m³), and its porosity

A sandstone rock specimen is 82 mm in diameter and 169 mm long whose mineralogic structure is composed of quarts and feldspar grains with calcite cement. At saturated state, its wet weight is 21.42 N; after oven drying its weight is 20.31 N. Calculate its wet unit weight, its dry unit weight (both in kN/m³), and its porosity

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

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.
Calculate the porosity of a rock that is 50% Quartz, 50% Muscovite, and that has a bulk density of 2.00 3 g/cm when saturated with water. (Density of quartz = 2.65 g/cm³; density of Muscovite = 2.85 g/cm³).
3. A sandstone core composed of quartz and feldspar grains with calcite cement is 75 mm in diameter and 160 mm long. On saturation in water, its wet weight is 1900 gr, and after oven drying its weight is 1862 gr. If the specific gravity (G) is equal to 2.7 for this sandstone, caleulate the saturated unit weight, the dry unit weight, and the porosity of this core.
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
An intact solid cylindrical specimen of diameter 50 mm and thickness 30 mm is prepared from a Hoek-Brown rock material with m,= 10. If the disc fails under a diametral compressive force of 7.8 kN as shown opposite, determine the brittleness index of the tested material based on stresses induced at the centre of the loaded specimen; i.e., the ratio of the material's compressive to tensile strength. Assume that the Hoek-Brown failure criterion is valid for the plane stress field condition developed at the centre of the specimen. 7.8 kN P B
10-14. The state plane stress in a mass of dense cohesionless sand is described by the following stresses: Normal stress on horizontal plane Normal stress on vertical plane = 200 kPa Shear stress on horizontal and vertical planes 370 kPa 80 kPa %3! Determine by means of the Mohr circle the magnitude and direc- tion of the principal stresses. Is this state of stress safe against failure? (After A. Casagrande.)
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
A sandstone core composed of quartz and feldspar grains with calcite cement is 75 mm in diameter and 160 mm long. On saturation in water, its wet weight is 1900 gr; and after oven drying its weight is 1862 gr. If the specific gravity (G) is equal to 2.7 for this sandstone, calculate the saturated unit weight, the dry unit weight, and the porosity of this core.
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.
Prove the relationship between porosity and void ratio
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.
For a limestone rock sample (assuming average limestone matrix density) saturated 100% with water, calculate the bulk density of the sample if its porosity is known to be 7%.