GTU Civil Engineering (Semester 8)
Repairs & Rehabilitation of Structures
May 2015
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary


1 (a) Write short note on RCC Jacketing.
7 M
1 (b) Write short note on Foundation Rehabilitation Methods.
7 M

2 (a) Explain briefly cracking of concrete and remedial measures for prevention of Cracking.
7 M
2 (b) Explain concrete repairing by grouting. Discuss in brief various mortars used for repairing of concrete structures.
7 M
2 (c) List out various Non Destructive Test (NDT) used to determine strength of existing structure. Explain any one of them.
7 M

3 (a) Explain need of concrete cover in R.C.C. structure. Give IS 456:2000 recommendations for nominal cover.
7 M
3 (b) What are the main objectives of condition assessment of structure?
7 M
3 (c) Explain Temperature effect on concrete.
7 M
3 (d) Define thermal properties of concrete
(i) Thermal conductivity
(ii) Thermal diffusivity
(iii) Specific heat
(iii) Co-efficient of thermal expansion.
7 M

4 (a) What are the different means of corrosion of steel in reinforced concrete? Explain its mechanism with neat diagrams
7 M
4 (b) Explain the methodology to repair a earthquake deficient masonry structure
7 M
4 (c) Enlist and explain long term Health monitoring techniques.
7 M
4 (d) Differentiate between porosity and permeability of concrete. Discuss the Factors affecting permeability of concrete.
7 M

5 (a) Differentiate between retrofitting and rehabilitation of structure.
7 M
5 (b) Describe various methods of demolition of framed reinforced concrete structure. What is implosion and what are its basic principles.
7 M
Write short note on (any two)
5 (c) i) Visual observations to assess fire damaged structure.
4 M
5 (c) ii) Fiber reinforced concrete.
3 M
5 (c) iii) Vacuum Concrete.
3 M
5 (d) Briefly explain different demolition technique.
7 M



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