Download GTU B.Tech 2020 Winter 5th Sem 3150610 Concrete Technology Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 5th Sem 3150610 Concrete Technology Previous Question Paper

Seat No.: ________
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?V (NEW) EXAMINATION ? WINTER 2020
Subject Code:3150610 Date:27/01/2021
Subject Name:Concrete Technology
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.
Q.1 (a) Briefly discuss the composition of concrete.
03

(b) Define workability and discuss factors affecting workability.
04

(c) Explain various causes of corrosion of steel in concrete and its
07
remedial measures.


Q.2 (a) Briefly explain Alkali-aggregate reaction.
03

(b) Explain the compaction factor test on concrete.
04

(c) Classify the various types of admixtures based on their
07
application. Explain water reducing type admixtures in detail.
Q.3 (a) Briefly discuss the need for curing and enlist various methods of
03
concrete curing.

(b) Enlist Bouge's compounds of cement and their role in the
04
hydration process.

(c) Enlist various factors affecting the strength of concrete and
07
explain anyone in detail.




Q.4 (a) Differentiate between fresh concrete and hardened concrete.
03

(b) Define the permeability of concrete and enlist various factors
04
affecting permeability.

(c) Explain the dry process for the manufacturing of cement.
07
Q.5 (a) Discuss segregation and bleeding of concrete briefly.
03

(b) Discuss the effect of freezing and thawing on concrete.
04

(c) Define nominal mix concrete and design mix concrete. Explain
07
step by step procedure of the IS method of mix design.



Q.6 (a) Define Ferro cement briefly.
03

(b) Differentiate between high strength and high-performance
04
concrete.

(c) Enlist types of fibers used in fiber reinforced concrete. Also,
07
explain factors affecting properties of fiber-reinforced concrete.
Q.7 (a) Briefly explain Gel-space ratio.
03

(b) Explain the importance of the water-cement ratio on the strength
04
of the concrete.

(c) Define creep. Explain the factors affecting the creep of concrete.
07



Q.8 (a) Distinguish between the grade of cement and grade of concrete.
03
(b) List various crack repair techniques and explain them to anyone
04
in detail.
(c) Enlist the types of NDT tests for concrete. Explain the rebound
07
hammer test in detail.
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