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Fourth Semester B.E. Degree Examination, Dec. 20l3lJan.2Ol4Goncrete Technology

Time: 3 hrs. Max. Marks:100Note: Answer FIVEfull questions, selecting

atlesst TWO questions from each part.

PART _ A

1 a. What are Boughe's compounds in cement? Explain the role of each compound in strength

gaining and hardening process. (10 Marks)

b. Exp14,,1$he process of "Dry Process" of manufacturing cement with a help of flow,lt"Jlr.u,

What are the physical requirements of good fine and coarse aggre$ates?Define "Grading of aggregates", what is the importance of.grading of aggregates in the

manufacture of quality concrete.

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3 a. Define water cement ratio, and how this w/c ratio will have influence on workability of fresh

concrete. ::: ,. ,, ,, (10 Marks)

b. What are admixtures? Why ihey..ale used in ttle,,manufacture of concrete? Explain any three

admixtures used in concrete manufacture. ',,,,, '''i (10 Marks)

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tt"'' - "t"'4 a. Write notes oni) Segregationii) Bleeding. (10 Marks)

b. What are the filed tests condtrCted on quality of cement at site of construction. (10 Marks)

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5 a. Define "Tensile "strength of concrete".concrete?

b. Define: . ,',ll'i) Flex$ml'strengthii) Cofuressive strengthiii) : Sptit tensile strength.

PART - B

How is it related with compressive strength of.,,i ,, r (10 Marks)

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6 a., Fxplain the relation between the modulus of elasticity and compressiv th of concrete.

Write shoft notes on :

i) Factors affecting the shrinkageiD Factors affecting creep.

What are the factors contributing to cracks in concrete?

Explain the significance of durability of concrete in itsaffecting the durability of concrete.

8 a. Define nominal mix, and its types, explain the importance of design mix in the RCC designof structural members. (10 Marks)

b. Write step by step procedure for I.S method of mix design (preferably flow chart) (10 Marks)

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