Question Paper: Concrete Technology Question Paper - Jun 17 - Civil Engineering (Semester 5) - Jawaharlal Nehru Technological University (JNTUH)
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Concrete Technology - Jun 17

Civil Engineering (Semester 5)

Total marks: 80
Total time: 3 Hours
INSTRUCTIONS
(1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Draw neat diagrams wherever necessary.

1.a. State the chemical composition of cement.
(5 marks) 00

1.b. What is bulking of sand?
(5 marks) 00

1.c. What are the factors affecting workability of concrete
(5 marks) 00

1.d. List out different methods of curing of concrete.
(5 marks) 00

1.e. State different types of light weight aggregate concretes.
(5 marks) 00

1.f. What are the properties of fibre reinforced concrete?
(5 marks) 00

1.g. List out different types of shrinkage in concrete.
(5 marks) 00

1.h. Write a short note on pull out test on concrete.
(5 marks) 00

1.i. Distinguish between ‘Mean strength” and ‘Target strength of concrete’.
(5 marks) 00

1.j. List out factors in the choice of mix proportion.
(5 marks) 00

2.a. What is hydration of cement and explain the influences of Bogue’s compounds.
(5 marks) 00

2.b. What are the different types of admixtures used in concrete and explain any two of them
(5 marks) 00

OR

3.a. Discuss in detail the various tests to be carried out to determine the quality of cement.
(5 marks) 00

3.b. What is alkali aggregate reaction? How to control alkali aggregate reaction?
(5 marks) 00

4.a Define workability of concrete? How to measure workability of concrete and explain any one of them.
(5 marks) 00

4.b. What is segregation & bleeding of concrete and how to minimize these effects in concrete?
(5 marks) 00

OR

5.a. What is maturity of concrete?
(5 marks) 00

5.b. Explain the concept of maturity as per Plowman.
(5 marks) 00

5.c. List and explain the various factors affecting the strength of concrete
(5 marks) 00

6.a. Explain the characteristics and uses of Fibre reinforced concrete.
(5 marks) 00

6.b. What is polymer concrete? List out different polymers used in concrete.
(5 marks) 00

OR

7. Explain briefly any two of them:

(a) High performance concrete.

(b) SIFCON.

(c) Self consolidating concrete.

(5 marks) 00

8.a. Explain how modulus of elasticity of concrete is determined.

(5 marks) 00

8.b. What are the factors influencing the elastic modulus of concrete
(5 marks) 00

OR

9. List out different Non-destructive tests of hardened concrete and explain any two of them.
(5 marks) 00

10.a. Write step wise procedure for mix design as per Indian standards.

(5 marks) 00

10.b. Explain durability of concrete and list out factors affecting durability of concrete.
(5 marks) 00

OR

11.a. Discuss about acceptance criteria in concrete mix design.

(5 marks) 00

11.b. Explain quality control of concrete.
(5 marks) 00

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