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 8, Problem 8.5QP
a)
To determine
The gross area compressive strength.
b)
To determine
The net area compressive strength.
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A half-block concrete masonry unit is subjected to compression until failure.The outside dimensions of the specimen are 190 mm X 190 mm X 190 mm.The cross section is a hollow square with a wall thickness of 38 mm. The loadis applied perpendicular to the hollow cross section and the maximum loadis 296 kN.a. Determine the gross area compressive strength.b. Determine the net area compressive strength.
A hollow concrete masonry unit has an actual gross dimension of 150mm x 200mm x 400mm (width x height x length). The net volume is 10,000,000 mm3. Calculate;
the gross area compressive
the net area compressive strength
What is the value of the Whitney stress block parameter, β1, for 6000 psi concrete?
Chapter 8 Solutions
Materials for Civil and Construction Engineers (4th Edition)
Ch. 8 - Prob. 8.1QPCh. 8 - Prob. 8.2QPCh. 8 - Prob. 8.3QPCh. 8 - Prob. 8.4QPCh. 8 - Prob. 8.5QPCh. 8 - Prob. 8.6QPCh. 8 - Prob. 8.7QPCh. 8 - Prob. 8.8QPCh. 8 - Prob. 8.9QPCh. 8 - Prob. 8.10QP
Ch. 8 - Prob. 8.11QPCh. 8 - A portion of a medium-weight concrete masonry unit...Ch. 8 - A portion of a concrete masonry unit was tested...Ch. 8 - A concrete masonry unit was tested according to...Ch. 8 - Prob. 8.15QPCh. 8 - Prob. 8.16QPCh. 8 - A severe weathering clay brick was tested for...Ch. 8 - Prob. 8.18QPCh. 8 - What is the grout? What is the grout used for?Ch. 8 - Prob. 8.20QP
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- Estimate the modulus of elasticity and the shear modulus of a concrete specimen with a dry density of 150 pcf (2400 kg/m3) and compressive strength of 4500 psi (31MPa) using Poisson’s ratio, ? =0.18.arrow_forwardA half-block concrete masonry unit is tested for compressive strength. Theoutside dimensions of the specimen are 190 mm * 190 mm * 190 mm.The cross section is a hollow square with a wall thickness of 25 mm. Theload is applied perpendicular to the hollow cross section and the maximum load is 225 kN.a. Determine the gross area compressive strength.b. Determine the net area compressive strength.arrow_forwardA half-block concrete masonry unit is tested for compressive strength. Theoutside dimensions of the specimen are 190 mm X 190 mm X 190 mm.The cross section is a hollow square with a wall thickness of 25 mm. Theload is applied perpendicular to the hollow cross section and the maximum load is 225 kN.a. Determine the gross area compressive strength.b. Determine the net area compressive strength.arrow_forward
- A hollow concrete masonry unit has an actual gross dimension of 150mm x 200mm x 400mm (width x height x length). The net volume is 10,000,000 mm3. Calculate; a.) the gross area compressive and b.) the net area compressive if the failure load is 500,000N.arrow_forwardA concrete masonry unit has actual gross dimensions of 190 mm * 190 mm *190 mm. The unit is tested in a compression machine with the followingresults:Maximum failure load = 370 kNNet volume = 5125 cm3a. Is the unit categorized as solid or hollow? Why?b. Calculate the gross area compressive strength.c. Calculate the net area compressive strength.arrow_forwardWrite discussion about Compressive strength of cube and Cylinder concrete specimens.arrow_forward
- A concrete masonry unit has actual gross dimensions of 190 mm X 190 mm X190 mm. The unit is tested in a compression machine with the followingresults:Maximum failure load = 370 kNNet volume = 5125 cm3a. Is the unit categorized as solid or hollow? Why?b. Calculate the gross area compressive strength.c. Calculate the net area compressive strength.arrow_forwardWhat is the stress in an 8-inch round x 16-inch high concrete cylinder (E = 2.5 x 10^6 psi) when the unit deformation is 0.0012 inch/inch? A. 500 psiB. 8100 psiC. 210 psiD. 3000 psiarrow_forwardThe design engineer specifies a concrete strength of 37.92 MPa. Determine the required average compressive strength for: a. a new plant where s is unknown b. a plant where s = 3.45 MPa for 22 test results c. a plant with extensive history of producing concrete with s = 2.76 MPa d. a plant with extensive history of producing concrete with s = 4.14 Mpaarrow_forward
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