EBK MATERIALS FOR CIVIL AND CONSTRUCTIO
4th Edition
ISBN: 8220102719569
Author: ZANIEWSKI
Publisher: PEARSON
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Chapter 8, Problem 8.4QP
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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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?
What is the permissible tensile strength of concrete , M150 ?
A 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?
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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- Write three aggregate properties that affect compressive strength of concrete.arrow_forwardA normal-weight concrete has an average compressive strength of 4500 psi.What is the estimated modulus of elasticity?arrow_forwardChapter 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 ksiarrow_forward
- As per NSCP 2015, what is the maximum permissible concrete strain? Select one: a. 0.002 b. 0.005 c. 0.003 d. 0.007arrow_forwardWrite the parameters that affect the compressive strength of concrete.arrow_forwardWhat is the approximate modulus of elasticity of steel in MPa for a concrete with a compressive strength of 21 MPa?arrow_forward
- 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)arrow_forwardWhat happens if any concrete cube fails in 28 days compressive strength test?arrow_forwardHow is unit weight of concrete affected by its aggregates?arrow_forward
- Estimate the modulus of elasticity for concrete with a density of 120 lb/ft3 and a 28-day maximum compressive strength of 3500 psi.arrow_forwardBriefly discuss each properties of concrete. a. Compressive strength b. Flexural strength c. Tensile strengtharrow_forwarddescribe step-by-step how the concrete flexural strength test is carried out.arrow_forward
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