Download GTU B.Tech 2020 Summer 8th Sem 2180607 Repairs And Rehabilitation Of Concrete Structures Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Summer 8th Sem 2180607 Repairs And Rehabilitation Of Concrete Structures Previous Question Paper

Seat No.: ________
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE ? SEMESTER-VIII EXAMINATION- SUMMER 2020

Subject Code: 2180607
Date: 26/10/2020
Subject Name: Repairs & Rehabilitation of Concrete Structures
Time:02.30 PM TO 05.00 PM




Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.



MARKS
Q.1 (a) Define: 1. Repair 2. Rehabilitation 3. Retrofitting
03

(b) Enlist different crack repair techniques. Explain any one in
04
detail.

(c) Enlist various causes of distress and deterioration of concrete
07
and explain any three in detail.


thre
e in detail
Q.2 (a) Define: 1. Durability of Concrete 2. Permeability of Concrete 3.
03
Efflorescence

(b) Write short note on Ferro Cement.
04

(c) Explain parameter for selection of repair material.
07


OR


(c) List various Non-destructive tests for assessment of strength of
07
concrete. Explain any one in detail.
Q.3 (a) Write short note on shoring.
03

(b) What are the causes of damage in Masonry buildings?
04

(c) Enlist various crack repair techniques in concrete and explain
07
any one in detail.


OR

Q.3 (a) Explain Thermal properties of the concrete.
03

(b) Discuss Epoxy as a repair material.
04

(c) Enlist different systems of protection for reinforcing steel in
07
RCC structure. Also discuss each in detail.
Q.4 (a) Mention steps for patch repair in RCC slab where carbonation
03
depth has reached reinforcement level.

(b) Explain how to improve durability of concrete in sea water.
04
1

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(c) What is carbonation? State and explain the factor affecting the
07
rate of carbonation. Explain the method to test depth of
carbonation.

OR

Q.4 (a) Differentiate between Porosity and Permeability.
03

(b) Differentiate between retrofitting and rehabilitation of
04
structures.

(c) Explain jacketing. Discuss repair and strengthening of columns
07
by jacketing technique.
Q.5 (a) Write short note on Polymere Concrete.
03

(b) Explain visual inspection to assess fire damaged structures.
04

(c) Explain long term health monitoring of structures.
07


OR
Q.5 (a) Write short note on fiber wrap technique.
03
(b) Enlist different crack repair techniques. Explain any one in detail
04
(c) Discuss various types of maintenance. Also explain importance
07
of building maintenance

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