GTU Civil Engineering (Semester 8)
Repairs & Rehabilitation of Structures
May 2016
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) State the reasons of deterioration of reinforced concrete buildings. Explain prevention measures during concreting and during its usage.
7 M
1 (b) What are the objectives of condition survey? In detail explain the various stages of it.
7 M

2 (a) Describe factors affecting corrosion of steel in concrete.
7 M
Solve any one question from Q2(b) & Q2(c)
2 (b) Explain the need of cover in RCC structures. Give IS:456-2000 recommendation for nominal cover.
7 M
2 (c) 'Air and moisture permeability of concrete adversely affect the health of concrete'- Justify the statement with examples.
7 M

Solve any two question from Q3(a), Q3(b) & Q3(c), Q3(d)
3 (a) Write a short note on polymer concrete.
7 M
3 (b) What is shore? Enlist different types of shores and explain use of Dead shore with sketch.
7 M
3 (c) State in detail the essential parameters for repair materials.
7 M
3 (d) Write a short note on Ferrocement.
7 M

Solve any two question from Q4(a), Q4(b) & Q4(c), Q4(d)
4 (a) Enlist and explain long term health monitoring techniques.
7 M
4 (b) Explain various methods to repair a earthquake deficient masonry structure.
7 M
4 (c) Distinguish between Rehabilitation and Retrofitting.
7 M
4 (d) Explain concrete repairing by grouting.
7 M

Solve any two question from Q5(a), Q5(b) & Q5(c), Q5(d)
5 (a) List methods of demolition and explain in brief.
7 M
5 (b) Discuss factors affecting selection method of demolition.
7 M
5 (c) Explain the ultrasonic pulse velocity test in detail.
7 M
5 (d) Define durability of concrete and explain the major causes of inadequate durability.
7 M



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