JE – 916

*JE916*

IV Semester B.E. (Civil) Degree Examination, June/July 2013 (2K 11 Scheme) CE 402 : CONCRETE TECHNOLOGY Time : 3 Hours

Max. Marks : 100

Instructions : i) Answer compulsory question No. 8 and any four full question. ii) Draw the neat sketches whenever necessary. 1. a) What are the test to be conducted on cement ? How does these results are used in production of concrete ?

10

b) What are the main ingredients of plain cement concrete ? Describe in detail the functions of each.

10

2. a) What is the significance of compaction of concrete ? Explain the different methods of compaction.

10

b) What is segregation of concrete ? Explain their remedial measure.

10

3. a) What is workability of concrete ? Briefly explain any one method of determining workability of the concrete in the laboratory.

10

b) What are the various factors influencing the workability of fresh concrete ? Discuss. 4. a) What is shrinkage of concrete ? Briefly explain various types of shrinkage.

10 10

b) What is creep of concrete ? What are the main factor influencing creep of concrete ? Explain. 5. a) What is Ready mix concrete ? Discuss their merits and demerits.

10 10

b) What are the requirements of good form work and explain different types of form work ?

10 P.T.O.

*JE916*

JE – 916

6. a) Define durability of concrete. What are the factors affecting the durably ? Discuss.

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b) Discuss briefly methods of measuring compressive strength and split tensile strength of concrete. 10 7. a) Define elastic Modulus of concrete. Explain determination of elastic modulus in laboratory. 10 b) What is mix design ? Explain step-by-step procedure as per 1 S code 10262-2009 method of concrete mix design. 8. Write short notes on (any four) : i) Curing of concrete ii) High density concrete iii) High performance concrete iv) Typical form work for R.C. C. square column v) Factors affecting strength of concrete.

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10

(4×5=20)