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sample2 - 6 How would you define the coefficient of...

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SAMPLE EXAM QUESTIONS Materials Science of Concrete 1. Using a sketch, show how the load is applied to a splitting tension test specimen. Also compute the splitting tensile strength (2P / π LD) of a 3 by 6-in cylinder if the failure load was 11,300 lbs. 2. Compare cylinder and cube strengths for compressive strength. 3. List four parameters that affects the elastic modulus of concrete. Explain your answer. 4. Show in a schematic form the following properties affect the creep of concrete: (a) type of concrete; (b) amount of aggregate; (c) water/cement ratio, (d) relative humidity 5. Does the aggregate strength have a large effect on the strength of concrete?
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Unformatted text preview: 6. How would you define the coefficient of permeability? Give typical values of the coefficient for (a) hardened cement pastes; (b) commonly used aggregates; (c) high-strength concretes; and (d) mass concrete for dams. 7. How does aggregate size influence the coefficient of permeability of concrete? List other factors that determine the permeability of concrete in a structure. 8. What chemical reactions are generally involved in sulfate attack on concrete? What are the physical manifestations of these reactions? 9. What is the alkali-aggregate reaction? List some of the rock types that are vulnerable to attack by alkaline solutions....
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