Materials for Civil and Construction Engineers (2nd Edition)
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ISBN: 9781292154411
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Chapter 7, Problem 7.34QP
To determine
The maximum load that can be applied to the given column.
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A short plain concrete column with dimensions of 12 in. x 12 in. x 36 in. is to be constructed. If the compressive strength of the concrete is 5000 psi, what is the maximum load that can be applied to this column using a factor of safety of 1.2?
A short plain concrete column with dimensions of 300 mm X300 mm X 900 mm is to be constructed. If the compressive strength of the concrete is34.5 MPa, what is the maximum load that can be applied to this column usinga factor of safety of 1.2?
A short plain concrete column with dimensions of 300 mm * 300 mm *900 mm is to be constructed. If the compressive strength of the concrete is34.5 MPa, what is the maximum load that can be applied to this column usinga factor of safety of 1.2?
Chapter 7 Solutions
Materials for Civil and Construction Engineers (2nd Edition)
Ch. 7 - The design engineer specifies a concrete strength...Ch. 7 - A project specifies a concrete strength of 24.1...Ch. 7 - A project specifies a concrete strength of at...Ch. 7 - What is your recommendation for the maximum size...Ch. 7 - A concrete mix with a 3-in. slump, w/c ratio of...Ch. 7 - Prob. 7.6QPCh. 7 - You are working on a concrete mix design that...Ch. 7 - Design the concrete mix according to the following...Ch. 7 - Design the concrete mix according to the following...Ch. 7 - The design of a concrete mix requires 1173 kg/m3...
Ch. 7 - Prob. 7.11QPCh. 7 - Prob. 7.12QPCh. 7 - Students in the materials lab mixed concrete with...Ch. 7 - Students in the materials lab mixed concrete with...Ch. 7 - Why is it necessary to measure the air content of...Ch. 7 - What do we mean by curing concrete? What will...Ch. 7 - Discuss five different methods of concrete curing.Ch. 7 - Draw a graph showing the typical relation between...Ch. 7 - Why is extra water harmful to fresh concrete, but...Ch. 7 - Discuss the change in volume of concrete at early...Ch. 7 - Discuss the creep response of concrete structures....Ch. 7 - Prob. 7.22QPCh. 7 - On one graph, draw a sketch showing the typical...Ch. 7 - Using Figure 7.34, a. Determine the ultimate...Ch. 7 - Three concrete mixes with the same ingredients,...Ch. 7 - Three concrete mixes with the same ingredients,...Ch. 7 - Three 100 mm 200 mm concrete cylinders with water...Ch. 7 - Students in the materials class prepared three 4 ...Ch. 7 - Three 150 mm 300 mm concrete cylinders with water...Ch. 7 - Three 6 in. 12 in. concrete cylinders with water...Ch. 7 - A normal-weight concrete has an average...Ch. 7 - Discuss the significance of the compressive...Ch. 7 - What is the standard size of PCC specimens to be...Ch. 7 - Prob. 7.34QPCh. 7 - What is the purpose of performing the flexure test...Ch. 7 - What are the advantages of using a third-point...Ch. 7 - Consider a standard flexural strength specimen of...Ch. 7 - To evaluate the effect of a certain admixture on...Ch. 7 - To evaluate the effect of a certain admixture on...Ch. 7 - Prob. 7.40QPCh. 7 - Prob. 7.41QPCh. 7 - A normal-weight concrete has an average...Ch. 7 - Three batches of concrete were prepared using the...Ch. 7 - Three batches of concrete were prepared using the...Ch. 7 - Prob. 7.45QPCh. 7 - Prob. 7.46QPCh. 7 - Discuss two nondestructive tests to be performed...Ch. 7 - Discuss the concept of concrete maturity meters.Ch. 7 - Discuss four alternatives that increase the use...Ch. 7 - What is self-consolidating concrete? How are its...Ch. 7 - Prob. 7.51QPCh. 7 - Two 6 in. 12 in. concrete cylinders with randomly...Ch. 7 - Discuss the concept of high-performance concrete....Ch. 7 - Comparing PCC with mild steel, answer the...Ch. 7 - Prob. 7.55QP
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- Four standard concrete cylinders of 6-inchdiameter cross section were tested underuniformly increasing axial compressive loads 28days after casting concrete. The maximummeasured loads were 121,000 lbs, 116,700 lbs,128,800 lbs, and 119,100 lbs. What is the averagecompressive strength of this concrete in ksi?arrow_forwardHow to get the value of compressive strength of concrete f'c, given the nominal shear stress on concrete fv=0.88 MPa?arrow_forwardDetermine the tensile steel ratio of a singly reinforced concrete beam for the following conditions using concrete strength f’c = 21 MPa and steel yield strength fy = 420 MPa. if the tensile strain is set as 0.009 upon crushing of concrete at a strain of 0.003. = [rr] (5 decimal places)arrow_forward
- A reinforced concrete column 250 mm diameter is designed to carry an axial compressive load of 600 KN. Using the allowable stresses oof concrete is 8 MPa and steel is 135 MPa, determine the required number of 20 mm diameter of the reinforcing steel. Assume that E(concrete) = 15 GPa and E(steel) = 200 GPa. (make your answer as a whole number)arrow_forwardCalculate the dead load due to concrete per foot length of beam if concrete specific weight is 30 kN/m3arrow_forwardDetermine the tensile steel ratio of a singly reinforced concrete beam for the following conditions using concrete strength f’c = 21 MPa and steel yield strength fy = 420 MPa. 16. if the tensile strain is εs = fy/Es upon crushing of concrete at a strain of 0.003. = [r] (5 decimal places)arrow_forward
- A concrete cylinder (6 x 12 in.), cured according to ASTM C 511 (100% RH and 23 °C) and tested at an age of 28 days in compression according to ASTM C 39 with a load rate of 30 psi/sec, fails at a load of 98,342 lb. The unit weight of the concrete is 145 lb/ft3. What is the compressive strength of the concrete cylinder in lb/in2? Round to the nearest whole number and do not include units when entering your answer.arrow_forwardDetermine the tensile steel ratio of a singly reinforced concrete beam for the following conditions using concrete strength f’c = 28 MPa and steel yield strength fy = 420 MPa. if the tensile strain is εs = fy/Es upon crushing of concrete at a strain of 0.003. = ___ (5 decimal places)arrow_forwardA concrete pier 12 in x 12 in section is 6 ft long and shortens a total of 0.05 in when it is loaded by a 300 kip axial load. Assuming a stress strain relationship that is approximately linear determine the E value for this concrete.arrow_forward
- A short plain concrete column with dimensions of 0.3 * 0.3 * 0.9 m is to be constructed. If thecompressive strength of the concrete is 34.5 MPa, what is the maximum load that can be appliedto this column using a factor of safety of 1.2?arrow_forwardThe properties of the reinforced concrete beam are b = 300 mm, d = 480 mm, Ast = 1306 mm2, and Est / Eco = 10. If the working stresses are 16.7 MPa for concrete and 104.8 MPa for steel, determine the corresponding bending moment (in Nm) for the concrete. Round off the final answer to two decimal places.arrow_forward1. Find the volume of concrete needed to fill theslump cone for the test.2. Find the volume of steel required to cast a slumpcone.arrow_forward
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