Materials for Civil and Construction Engineers (4th Edition)
4th Edition
ISBN: 9780134320533
Author: Michael S. Mamlouk, John P. Zaniewski
Publisher: PEARSON
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Chapter 7, Problem 7.41QP
To determine
The flexural strength of the beam.
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A center-point loading flexural test was performed on a concrete beam with a cross section of4 in. * 4 in. and a span of 8 in. If the failure load was 5,000 lb, find the flexure strength.
A center-point loading flexural test was performed on a concrete beam with a cross section of 100 mm * 100 mm and a span of 200 mm. If the failure load was 26.9 kN, find the flexure strength.
A center-point loading flexural test was performed on a concrete beam with across section of and a span of 8 in. Ifthe failure load was 5,000 lb,find the flexure strength.
Chapter 7 Solutions
Materials for Civil and Construction Engineers (4th 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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- A flexure strength tests were performed on a concrete beam having a cross section of 0.15x0.15m and a span of 0.45m. If the total load at failure was 37.5kN, calculate the ff:a. The flexure strength of the concrete if center-point was applied.b. The flexure strength of the concrete if third-point was applied.c. Which of the two flexural tests is recommended in determining the flexure strength of the concrete and why?arrow_forwardWhat would be the average compressive strength of concrete if the load at failure of the 3 trials are 55, 100 kg, 54, 800 kg, and 55, 200 kg. Diameter of the sample is 6”. a 31.1 MPa b 30.1 MPa c 30.6 MPa d 30.6 MPaarrow_forwardThe maximum applied load on a cylindrical concrete specimen of diameter 150 mm and length 300 mm tested as per the split tensile strength test guidelines of IS 5816:1999 is 157 kN. The split tensile strength (in MPa, (round off to three decimal place) of the specimen isarrow_forward
- A concrete specimen with b = d is supported at both ends 600mm apart. It is tested for flexure strength with load at midspan of 100kN and failed with a flexural stress of 52.083 MPa. What is the dimension b and d of the specimen in mm?arrow_forwardThe third-point loading flexure strength test was performed on a IVI ... concrete beam having a cross section of 0.15 m by 0.15 m and a span of 0.45 m. If the load at failure was 35.7 kN, calculate the flexure strength of the concrete. This normal-weight concrete has an average compressive strength of 20 MPa. What is the estimated flexure strength (hints: use the ACI equation)?arrow_forward7. The third-point loading flexure strength test was performed on a concrete beam having a cross section of 150 mm by 150 mm and a span of 450 mm. If the load at failure was 35.7 kN, calculate the flexural strength of this concrete.arrow_forward
- What is the compressive strength of Concrete if a 6" cylindrical sample was tested in UTM and failed at 640 kN load? о 35 MPа о 28.5 MPа o 28 MPa o 30 MPaarrow_forwarda concrete column base is circular, with a diameter of 8 in, and carries a direct compressive load of 70000 lb. compute the compressive stress in the concretearrow_forwardMaximum strain in concrete taken for design is 0.0040 while strain in deformed bar is calculated with an offset at 0.0015. A beam has an effective depth of 550 mm and is reinforced with Fe415 steel. What would be the value of limiting neutral axis depth (in mm) for this beam?arrow_forward
- A center point loading is used to test concrete for flexure. The sample is 150mm x 150mm and has a clear span of 600mm. The sample failed when the load applied is 100,000N. What is the flexure stress at failure in MPa?arrow_forwardA hardened concrete cylinder is tested in compression. The ultimate compressive load measured in the laboratory is 262.5 kN. If the sample is 101.3 mm in diameter, calculate the compressive strength in MPa. Round answer to 3 significant digitsarrow_forwardA 150mm x 150mm concrete specimen was tested for flexure strength over a span of 600mm. The load at midspan causes a flexure strength of 41.4 MPa. What was the maximum applied load in kN?arrow_forward
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