GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VIII (Old) EXAMINATION - WINTER 2019
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Subject Code: 180607 Date: 29/11/2019Subject Name: Repairs & Rehabilitation Of Structures
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
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2. Make suitable assumptions wherever necessary.3. Figures to the right indicate full marks.
Q.1 (a) Differentiate between micro-crack & macro-crack. Explain the 07
mechanism of micro-cracking due to differential thermal exposure
in structures.
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(b) Make a list of various construction and design deficiencies in 07
structures. Explain the consequences of any two in detail.
Q.2 (a) Define Condition assessment of structures. Explain its objectives. 07
(b) Define Durability of Concrete. Enlist factors affecting durability 07
in concrete structures.
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OR
(b) What are the major causes of deterioration in Concrete structures? 07
Explain the chemical deterioration due to Alkali aggregate reaction
and Carbonation of concrete.
Q3 (a) Write requirements as per IS:456 for durability of concrete 07
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structures. (b) What is the importance of the field and laboratory testing for 07
damage assessment of the Structure?
OR
Q3 (a) Mention the essential requirements of a repair material. 07
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(b) Explain briefly: (a) Foamed Concrete (b) Fiber Reinforced 07
concrete (c) Polymer latex concrete.
Q4 (a) Describe in detail the different techniques you will apply to repair 07
or strengthen a distressed RCC slab.
(b) Enlist the various demolition techniques and explain few in detail. 07
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OR
Q.4 (a) What is meant by Jacketing? Discuss repair and strengthening of 07
columns by jacketing.
Q.4 (b) Write short note on Foundation Rehabilitation Methods 07
Q.5 (a) Explain the crack repair by Routing and Sealing. 07
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(b) Explain the process of corrosion in Reinforced concrete structures. 07
Mention the methods for corrosion protection.
OR
Q.5 Differentiate between the following (Any seven) 14
Repair & Rehabilitation
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Active crack and Passive crackStructural vs Non-structural crack
Design error & Construction error
Durability and Serviceability
Porosity & Permeability
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Jacketing & OverlayingAir voids & Capillary porosity
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