Download GTU B.Tech 2020 Summer 4th Sem 2140608 Concrete Technology Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Summer 4th Sem 2140608 Concrete Technology Previous Question Paper

Seat No.: ________
Enrolment No.___________


GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER? IV EXAMINATION ? SUMMER 2020
Subject Code: 2140608 Date:04/11/2020
Subject Name: Concrete Technology
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.
Q.1 (a) State chemical composition of Ordinary Portland cement.
03

(b) Differentiate between setting and hardening of cement.
04

(c) State major Bogue's compounds, its abbreviations and discuss its properties.
07
Q.2 (a) Describe Aggregate Crushing value test on coarse aggregate.
03

(b) Discuss the quality of water for making concrete and state limiting values of
04
impurities as recommended by IS 456:2000.

(c) Describe the test for determination of initial and final setting time of cement.
07
State IS requirements for setting time for OPC.


OR


(c) Discuss importance of grading of aggregate. Explain gap graded, well graded,
07
uniformly graded and poorly graded aggregate with the help of grading
curves.
Q.3 (a) List different methods for curing of concrete and explain anyone in detail.
03

(b) Explain segregation and bleeding. How it can be controlled?
04

(c) List the factors affecting workability of concrete and explain any three of
07
them.


OR

Q.3 (a) Explain the terms Shrinkage, Creep and Modulus of Elasticity of concrete.
03

(b) Discuss the effect of water cement ratio on the strength of Concrete.
04

(c) Enlist different tests for hardened concrete. Explain Split cylinder test.
07

Q.4 (a) Explain alkali aggregate reaction. State factors promoting it.
03

(b) What do you understand by durability of concrete? Enlist factors affecting
04
durability of concrete. Explain any one in brief.

(c) Describe slump test for measurement of workability. How the test results are
07
interpreted?

OR

Q.4 (a) State acceptance criteria of concrete as per IS456:2000
03

(b) Describe in detail fiber reinforced concrete.
04

(c) Define nominal mix and design mix concrete. Describe step by step
07
procedure of IS method of mix design.
Q.5 (a) Discuss polymer concrete.
03

(b) Write short note on cold weather concreting.
04

(c) Define admixture and state uses of any three admixtures in concrete.
07


OR
Q.5 (a) Discuss different methods of transporting fresh concrete.
03
(b) Explain effect of plasticizers on properties of concrete.
04
(c) List various Non-Destructive tests for assessing the strength of concrete.
07
Explain Rebound Hammer test.
*************
1

---