Estimate of the point load strength index

Assignment Help Civil Engineering
Reference no: EM13508531

1. Triaxial tests were carried out on 54-mm-diameter (NX core) intact rock specimens. The applied confining nressures and the principal stress differences at failure are summrised below.

Confining pressure (MPa)

0

5.0

10.0

15.0

20.0

25.0

Principal stress difference (MPa)

59.5

87.5

I 16.0

139.5

167.5

192.5

Plot σ1, against σ3 at failure and determine the uniaxial com­pressive strength and the friction angle of the intact rock.

2. The intact rock that follows the Mohr-Coulomb failure criterion has c = 15 MPa and Φ = 27°. Estimate the uniaxial compres­sive strength;, the uniaxial tensile strength σ, and the Brazilian indirect tensile strength σ't. Give an estimate of the point load strength index Is(50) and suggest a realistic range for the Youngs modulus E.

Reference no: EM13508531

Questions Cloud

What is the magnitude of the normal force on the addict : A circular-motion addict of mass 95 kg rides a Ferris wheel around in a vertical circle of radius 10 m at a constant speed of 6.4 m/s. What is the magnitude of the normal force on the addict from the seat when both go through the highest point of t..
How an increase or decrease in partnership liabilities : Explain how an increase or decrease in partnership liabilities can affect the basis of a general partner and a limited partner.
What would is the total amortization expense : Ted bought a copyright in the current year for his business. Purchased the copyright on July 15th for $78,000. The remaining life on the patent is 75 months, what would is the total amortization expense he could deduct during the current year..
Compute the extra force the sprinter must exert on ground : A sprinter of mass 69.3 kg runs at a constant speed of 10.9 m/s in a straight line. Find the extra force the sprinter must exert on the ground
Estimate of the point load strength index : Estimate of the point load strength index Is(50) and suggest a realistic range for the Youngs modulus E.
What is the cost of the preferred stock : Burnwood Tech plans to issue some $60 par preferred stock with a 6% dividend. The stock is selling on the market for $70.00, and Burnwood must pay flotation costs of 5% of the market price.
How much depreciation expense should be taken : Dart LLC purchased one asset during the current year, a truck used only for business. It was purchased on August 20th-- a basis of $23,000. How much depreciation expense should be taken in the current year, ignoring §179 and bonus depreciati..
Find the frictional force acting on the upper block : Two blocks, each of mass m = 2.1 kg, are pushed along the horizontal surface of a table by a horizontal force P of magnitude 5.4 N, Find the frictional force acting on the upper block
Classify the items as operating add to net income : Classify the items as (1) operating - add to net income; (2) operating - deduct from net income; (3) investing; (4) financing; or (5) significant noncash investing and financing activities. Use the indirect method.

Reviews

Write a Review

Civil Engineering Questions & Answers

  What is max volume of treated wastewater should put in water

incoming wastewater , with BOD5 equal to about 200mg/l is treated in well-run secondery treatment plant remove 90 percent of the BOD. you are to run five-day BOD test with a stander 300-ml bottle , using mixture of treated sewage and dilution wate..

  Determine what is the volume of rainfall excess

It rains 3.0 in. on a 20.0 acre watershed. What is the volume of rainfall excess if 30% of the watershed area is a lake and infiltration on the soil is estimated at 1.0 in. What is the total volume of runoff.

  Influencing the allowable bearing pressure

What are the two principle factors influencing the allowable bearing pressure in the design of a specific footing- Are both of these factors equally important? Are both factors likely to be equally relevant for different soils types

  Determine the magnitude and direction of the force

Determine the magnitude and direction of the force P in so that the resultant of P and the 900N force is a vertical force of 2700N directed downward using.

  Calculate speed of barge just after truck falls off the barg

The truck is driving onto the stationary barge at the speed of v1. The masses of the truck and the barge are m and M, respectively. The barge is free to move on the water and the water resistance is to be ignored.

  Find the density of air and weight of the air in the tank

An empty air tank has a volume of 0.024 m3. The compressor on the tank is run until the pressure gauge reads about 65 psi (or 22,500 Pa). Assuming the temperature of the tank is 25 C, find the density of the air and the weight of the air in the ta..

  Lets design the members if they are made of woodcompression

1.for the pinned frame below subjected to a 500 kn lateral force what are the internal forces in each member? 2.for a

  Whate are the relative fractions of ferrite and cementite

A Fe-.25 w/o Carbon alloy is sloly cooled to 700 degrees C. What is the composition of the Ferrite(alfa) phase and what is the compositon of the cementite(Fe3C) phase. Whate are the relative fractions of ferrite and cementite

  What is the speed that the observer at a records

Car B is driving straight toward the point O at a constant speed v. An observer, located at A, tracts the car with a radar gun. What is the speed |r(dot)B/A| that the observer at A records

  How much energy do methanogenic bacteria get from h2

How much energy do methanogenic bacteria get from using glucose and hydrogen (H2) to form methane and water as the products. Determine the net reaction (assume methane and water are the only products).

  Compute normal and critical depths in a concrete culvert

compute normal and critical depths in a concrete culvert(n=0.015)with a diameter of 36in.and a bed slope of 0.002ft/ft if the design discharge is 15cfs.is the slope steep or mild?reap for S= 0.02ft/ft.

  Determine what is the pond depth above the 5 ft

calculate the depth of water in a stormwater pond resulting from a two hour rainfall event. the rainfall occurs over a 24-acre watershed at an average rate of 1 inch/hour. the runoff coefficient is 0.5.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd