A1-What is the bond strength between steel and conerete and how it can be calculated?2-What is the segregation of fresh concrete? Give its reason and how to control it?V3- What are the advantages of concrete?3- Discuss the effect of age and curing on the compressive strength of concrete.5-What are the main purposes of using plasticizer admixtures?6-What are the main techniques that should be used to reduce heat of hydration in massCoti fullowing:

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1-What is the bond strength between steel and concrete and how it can be calculated? our to control it?

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Composite Construction

Composite construction is the construction of structures in which two or more materials are used. Regarding structural engineering, composite construction is a construction where two materials are bound together in a technical manner such that both the materials act as a single unit to carry and transfer the load. The motives of composite construction are to increase the structural strength, make structures more aesthetic, and provide a sustainable environment.

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A1-What is the bond strength between steel and conerete and how it can be calculated?
2-What is the segregation of fresh concrete? Give its reason and how to control it?
V3- What are the advantages of concrete?
3- Discuss the effect of age and curing on the compressive strength of concrete.
5-What are the main purposes of using plasticizer admixtures?
6-What are the main techniques that should be used to reduce heat of hydration in mass
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A1-What is the bond strength between steel and concrete and how it can be calculated? 2-What is the segregation of fresh concrete? Give its reason and how to control it? V3- What are the advantages of concrete? 3- Discuss the effect of age and curing on the compressive strength of concrete. 5-What are the main purposes of using plasticizer admixtures? 6-What are the main techniques that should be used to reduce heat of hydration in mass
A concrete mix includes the following ingredients per cubic meter: a. Cement = 400 kg b. Water = 176 kg c. No admixture Table P6.30 shows possible changes that can be made to the mix ingredi- ents. Indicate in the appropriate boxes in the table what will happen in each case for the workability and the ultimate compressive strength as increase, decrease, or approximately the same.
A. What are the primary and secondary parameters upon which durability of concrete depends on? Discuss in detail one PRIMARY PARAMETER to which concrete is exposed in the image shown: *
4b. Deformation occurs on freshly lay concrete when it finally set or harden.discuss the various causes for dimensional changes in the hardened concrete.
1. What are the most common applications for structural steel?2. What is the purpose of reinforcing steel in concrete? Discuss the qualities of reinforcing steel in general.3. Discuss briefly four kinds of heat treatment used to improve the characteristics of steel. What are the benefits of each kind of treatment?
Concrete is strongest when subjected to: O A) Tension O B) Bending O9 Torsion O D) Compression If a peak load of 250 kN was exerted on a 100 mm x 200 mm test cylinder, the compressive strength of the concrete is: OA) 28.6 MPa O B) 35.2 MPa O9 31.8 MPa O D) 32.4 MPa The approximate volume percentages of the principal components of a concrete mixture are: 6%, 11%, 41%, 26%, 16%. Which of the following lists matches the correct order of these main components? Start with the one at 6% and end with the one at 16%. O Air, Water, Coarse Aggregate, Fine Aggregate, Cement O Water, Coarse Aggregate, Fine Aggregate, Cement, Air O Air, Coarse Aggregate, Fine Aggregate, Water, Cement O Air, Cement, Coarse Aggregate, Fine Aggregate, Water Under ideal conditions, concrete should be batched and placed within after mixing, when retarding admixtures are not used. OA 90 minutes O B) 1/2 hour OC 4 hours O D) 120 minutes
6. Discuss the different types of volume change in concrete at early and long-term ages.
A concrete mix includes the following ingredients per cubic meter: Cement%3D400 kg Water=184 kg No admixture Table below shows possible alternatives mix ingredients. Indicate in the appropriate boxes in the table what will happen in each case for the workability and the ultimate compressive strength as increase, decrease or approximately the same. What will happen? Cement Water Admixture (kg) (kg) Ultimate compressive Workability strength 400 225 None 449 184 None Water 400 184 Reducer Water 400 128 Reducer 400 184 Super Plasticizer 400 184 Air Entrainer 400 184 Accelerator DFocus
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
A project specifies a concrete strength of at least 3000 psi. Materials engineers will design the mix for a strength higher than that. Calculate the required average compressive strength of the mix design if the standard deviation is s = 350 psi. Estimate the modulus of elasticity of the concrete at the required average compressive strength (the calculated strength, not the given strength).
Which one of the following sentences is not correct? a.For many years, tensile strength has been measured in terms of the compressive strength. b.The modulus of rupture where the normal-weight concrete has an fc of 4000 psi is 474 psi. c.For lightweight concretes tensile strength depends largely on the porous aggregate. d.For normal weight concrete, the tensile strength depends primarily on the strength of bond between hardened cement paste and aggregate.
Correctly define which of the stress versus strain graphs represent the comparison of 8 ksi and 4 ksi concrete for the chart below (say left or right). Qualitatively compare the w/c ratio, elastic modulus, and brittleness. 0.000 0.003 0.000 0.003 Sean, e Sane Feure 2 Strss vesus Srain curves Feure 2. Stress vasus rain curve