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Advanced Concrete Technology Question Paper - Dec 18 - Civil Engineering (Semester 7) - Pune University (PU)
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Advanced Concrete Technology - Dec 18
Civil Engineering (Semester 7)
Total marks: 80
Total time: 3 Hours
INSTRUCTIONS
(1) Answer Q1 or Q2, Q3 or Q4, Q5 or Q6,Q7 or Q8,Q9 or Q10.
(2)Neat diagrams must be drawn wherever necessary.
(3) Figures to the right indicate full marks.
(4) Your answers will be valued as a whole.
(5) Use of electronic pocket calculator is allowed.
(6) Assume suitable data if necessary.
(7) Use of IS code $10262,456$ is not allowed.
1.a.
Write short note on gel-space ratio.
(4 marks)
00
1.b.
Explain in brief the comparison between natural river sand and manufactured sand used in making concrete.
(6 marks)
00
OR
2.a.
What is mean by green concrete? State the various materials used in green concrete.
(4 marks)
00
2.b.
What are the guideline for quality control and quality assurance of concrete? How to check the quality of concrete in fresh and hardened state?
(6 marks)
00
3.a.
Compare the high performance concrete and High strength concrete with respect to material, mechanical properties and elastic properties.
(4 marks)
00
3.b.
Write short note on
(6 marks)
00
i) Pervious concrete
ii) Vacuum concrete
OR
4.a.
State advanced non-destructive testing methods. Explain ány one in details.
(4 marks)
00
4.b.
Explain step by step procedure to design the Self compacting concrete.
(5 marks)
00
5.a.
Explain basic concept of Fibre reinforced concrete. Give examples of fibres suitable to improve
(6 marks)
00
i) flexural strength
in) impact strength
iii) shear strength
5.b.
Explain the behaviour of brittle fibre in brittle matrix and elastic fibre in brittle matrix.
(6 marks)
00
5.c.
Write short note on tensile behavior of fibre reinforced concrete.
(6 marks)
00
OR
6.a.
Explain the bending behaviour of fibre reinforced concrete.
(6 marks)
00
6.b.
Write short note on Steel fibre and Polypropylene fibres.
(6 marks)
00
6.c.
What is the effect of aspect ratio of fibres on workability and strength
(6 marks)
00
7.a.
Explain the behaviour of GFRC under tension, compression and flexure.
(6 marks)
00
7.b.
What is SIFCON? Explain the procedure to develop this material and its applicafions.
(6 marks)
00
7.c.
Explain interaction between fibre and matrix, un-cracked and cracked in flexure.
(4 marks)
00
OR
8.a.
Explain the quality control test to be conducted on fibre reinforced concrete.
(6 marks)
00
8.b.
Explain the procedure to mix fibres in concrete. Why workability of concrete reduces with addition of fibres?
(6 marks)
00
8.c.
Give the examples of nâturally occurring fibres and their applications?
(4 marks)
00
9.a.
Compare ferrocement construction with RCC construction with respect to material, handling, shape, density, strength and ductile behaviour.
(6 marks)
00
9.b.
Explain the step by step procedure to construct ferrocement elements like wall and water tank.
(6 marks)
00
9.c.
Why rich mortar mix is used in the ferrocement construction?
(4 marks)
00
OR
10.a.
Give the examples of precast concrete element available in market and its advantages and disadvantages with respect to on-site construction.
(6 marks)
00
10.b.
Explain close mould techniques of ferrocement construction.
(6 marks)
00
10.c.
Explain the manufacturing process of industrial precast pipes.
(4 marks)
00
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