EBK MATERIALS FOR CIVIL AND CONSTRUCTIO
4th Edition
ISBN: 8220102719569
Author: ZANIEWSKI
Publisher: PEARSON
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Question
Chapter 8, Problem 8.3QP
To determine
The shape of the concrete masonry, the compressive strength of the concrete masonry, and check for compressive strength against ASTM requirement.
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Chapter 13 Question:
What is the elasticity of concrete for a normal weight mix (unit weight equal to
150 pcf) with a compressive strength of 5,000 psi?
O 3.644 ksi
O 4.074 ksi
4,287 ksi
O 3.976 ksi
O 3,834 ksi
What is the permissible tensile strength of concrete , M150 ?
A concrete masonry unit is tested for compressive strength and produces the following results:
Failure load = 120,000 lb
Gross area = 130 sq.in
Gross volume 960 cu. in
Net volume = 447 cu.in
Is the unit categorized as solid or hollow? Why? What is the compressive strength? Does the compressive strength satisfy the ASTM
requirements for load bearing units shown?
...
TABLE 8.2 Strength Requirements of Load Bearing and Non-Load-
Bearing Concrete Masonry Units (Reprinted, with permission, from
ASTM C90, Table 3 and C129, Table 2, copyright ASTM International,
100 Barr Harbor Drive, West Conshohocken, PA 19428)
Minimum Compressive Strength
Based on Net Area MPa (psi)
Туре
Average of Three Units
Individual Units
Load bearing
13.1 (1900)
11.7 (1700)
Non-load-bearing
4.1 (600)
3.5 (500)
Chapter 8 Solutions
EBK MATERIALS FOR CIVIL AND CONSTRUCTIO
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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- A concrete masonry unit is tested for compressive strength and produces the following results: Failure load = 120 kips Gross area = 130 in 2 Gross volume = 960 in 3 Net volume = 447 in 3 a) is this unit categorized as solid or hollow? b) what is the compressive strength? c) does the compressive strength satisfy the ASTM requirements for load bearing units?arrow_forwardA concrete masonry unit is tested for compressive strength and produces thefollowing results:Failure load = 120,000 lbGross area = 130 in2Gross volume = 960 in3Net volume = 447 in3Is the unit categorized as solid or hollow? Why? What is the compressivestrength? Does the compressive strength satisfy the ASTM requirements forload bearing units shown in Table 8.2?arrow_forwardA normal-weight concrete has an average compressive strength of 30 MPa. What is the estimated modulus of elasticity?arrow_forward
- What is the approximate modulus of elasticity of steel in MPa for a concrete with a compressive strength of 21 MPa?arrow_forwardWrite the parameters that affect the compressive strength of concrete.arrow_forwardBriefly discuss each properties of concrete. a. Compressive strength b. Flexural strength c. Tensile strengtharrow_forward
- Write three aggregate properties that affect compressive strength of concrete.arrow_forwardA concrete masonry unit is tested for compressive strength and produces thefollowing results:Failure load = 726 kNGross area = 0.081 m2Gross volume = 0.015 m3Net volume = 0.007 m3Is the unit categorized as solid or hollow? Why? What is the compressivestrength? Does the compressive strength satisfy the ASTM requirements forload bearing units shown in Table 8.2?arrow_forwardGive the relationship between the compressive, tensile and flexural stress of concrete in terms of percentage of strength.arrow_forward
- Using the ACI code equation, estimate what would be the modulus of elasticity of this concrete at the required compressive strength if a project specifies a concrete strength of 24.1 MPa.arrow_forwardwhat are the physical and mechanical properties of concrete? list differentlyarrow_forwardEstimate the modulus of elasticity for concrete with a density of 120 lb/ft3 and a 28-day maximum compressive strength of 3500 psi.arrow_forward
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