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Compute the energy release rate for the double cantilever beam when loaded by end moments.
A series of experiments on identical specimens of Maxwell material were performed. Discuss the implications of results in practical applications.
Is the compressive strength going to increase? What about the elastic modulus? Please justify your answer.
Assume that the freezing was done carefully and, therefore, did not generated micro cracks. Which concrete will have a higher elastic modulus?
What is roller-compacted concrete? Define mass concrete. What type of cements and admixtures are used for making mass concrete mixtures?
Discuss the two principal problems in radiation shielding. What are the benefits of using concrete as a shielding material?
What do you understand by the terms polymer concrete, latex-modified concrete, and polymer-impregnated concrete?
What is the principal advantage of using fiber-reinforced concrete? Explain how the concrete acquires this property.
What changes may have to be made in the mix proportions for flowing concrete?
In high-rise buildings, what are the advantages of constructing shear walls and columns with high-strength concrete?
In spite of the cellular structure of aggregate, lightweight concretes show less micro cracking and excellent durability. Why?
Describe the difference between X-ray radiography and X-ray tomography. What type of problems will that generate?
Determine the thickness of delamination in a concrete pavement. Devise a scheme to determine the location of a crack using acoustic emission.
What will be the consequences of such inhomogeneities in the selection of the wave frequency to be used for a nondestructive test on concrete?
Write a memo describing the protocol of the site investigation including what nondestructive tests should be used to determine the best repair strategy.
List four nondestructive test method for the evaluation of concrete quality. Explain which you would recommend for deciding the formwork removal time.
Write a short note to the attention of the owner on the subject of a concrete quality. Describe the essential elements of statistical quality control charts.
Calculate the temperature of concrete, assuming that the cement and the aggregate are at 30oC and the water has been cooled to 5oC.
Explain the mechanism by which mineral admixtures are able to improve the pump ability and finish ability of concrete mixtures.
What maximum strength levels have been attained in recently developed high strength concrete mixtures? What is high-performance concrete?
Briefly, what tips would you like to pass on to the engineer in charge of mix proportioning on the subject of materials cost reduction?
Why is it not necessary to take into account durability considerations in concrete mix proportioning when the concrete is subject to normal exposure conditions?
In mix designing, why is it desirable to use a minimum amount of water? For a given slump, how can you reduce the amount of water?
Describe the significance of workability of concrete and the factors affecting the property.
Briefly state the influence of maximum aggregate size on the mixing water content and the cement content of a concrete mixture with a given water-cement ratio.