GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VIII (NEW) EXAMINATION — WINTER 2018
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Subject Code: 2180607 Date: 19/11/2018
Subject Name: Repairs & Rehabilitation Of Concrete Structures
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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Q.1 (a) Give various construction errors that lead to the cracking and deterioration of concrete. 03
(b) Discuss Epoxy as a repair material. 04
(c) How does corrosion occur in RCC Structures? Discuss various corrosion mitigation techniques? 07
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Q.2 (a) How can we improve the durability of concrete in seawater? 03
(b) How is corrosion of reinforcement prevented in RCC? 04
(c) Explain carbonation in concrete. How is it determined in concrete? What are the limitations associated with it? 07
OR
(c) What are the causes of distress in concrete? 07
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Q.3 (a) How is the repairing of small cracks carried out in structures? 03
(b) Explain the methodology to repair an earthquake-deficient structure. 04
(c) Explain the rebound hammer test with a neat sketch. 07
OR
Q.3 (a) Which parameters are required for the selection of repair material? 03
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(b) Write a short note on the fiber wrap technique. 04(c) Enlist factors affecting permeability. Explain in detail. 07
Q.4 (a) How to carry out repairs of leakage from a terrace? 03
(b) Explain crack due to overloading with a sketch. 04
(c) What do you mean by jacketing? Explain column jacketing with a neat sketch. 07
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OR
Q.4 (a) Distinguish between Rehabilitation and Retrofitting. 03
(b) What are the factors affecting pulse velocity measurement? 04
(c) Write a short note on vacuum concrete and ferrocement. 07
Q.5 (a) What is durability? Enlist factors affecting durability. 03
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(b) Write a short note on the temperature effect on concrete. 04(c) Explain alkali-silica reaction in detail. 07
OR
Q.5 (a) Give the advantages of utilizing Portland slag cement. Where is it used? 03
(b) Write a short note on visual inspection to assess fire-damaged structures. 04
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(c) Write a short note on the effect of freezing and thawing. 07--- Content provided by FirstRanker.com ---
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