Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 4th Sem New 2140608 Concrete Technology Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?IV(NEW) ? EXAMINATION ? SUMMER 2019
Subject Code:2140608 Date:15/05/2019
Subject Name: Concrete Technology
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) Explain the effect of water cement ratio on the workability and
strength of Concrete?
03
(b) Define the primary and secondary hydration process of Cement Paste. 04
(c) Write down merits and demerits of concrete properties in terms of
workability, strength and durability while using the Ordinary Portland
Cement and Portland Pozzolana Cement.
07
Q.2 (a) Differentiate between setting and hardening of cement. 03
(b) Describe the wet process of manufacturing of cement in the flow
chart.
04
(c) Describe the test for determining initial and final setting time of
cement.
07
OR
(c) What is sustainability of concrete? How to make concrete sustainable
according to your viewpoint?
07
Q.3 (a) List out the factors affecting the workability of concrete and explain
anyone in detail.
03
(b) Differentiate between volume batching and weigh batching in
concrete mix procedure.
04
(c) State the different methods of concrete curing and explain anyone in
detail.
07
OR
Q.3 (a) List out the factors affecting the segregation & explain anyone. 03
(b) List out various types of special concreting techniques & write the
merits of ready-mixed concrete.
04
(c) List out a minimum of seven types of special concrete & describe
lightweight aggregate concrete.
07
Q.4 (a) Write down the purpose of adding Chemical Admixtures in concrete. 03
(b) List out the factors affecting shrinkage and explain any one in detail. 04
(c) Write down the factors affecting the strength of concrete & describe
any three in detail.
07
OR
Q.4 (a) Why compressive strength of concrete performed on 7 days and 28
days? Give your comments on that.
03
(b) List various crack repair techniques and explain any one in detail. 04
(c) Describe the Rebound Hammer Test with the labelled sketch. Write
down the limitations of this test method.
07
Q.5 (a) Explain in brief about freezing and thawing effect of concrete. 03
(b) Write down the various advantages of Quality control of the concrete
mix.
04
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?IV(NEW) ? EXAMINATION ? SUMMER 2019
Subject Code:2140608 Date:15/05/2019
Subject Name: Concrete Technology
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) Explain the effect of water cement ratio on the workability and
strength of Concrete?
03
(b) Define the primary and secondary hydration process of Cement Paste. 04
(c) Write down merits and demerits of concrete properties in terms of
workability, strength and durability while using the Ordinary Portland
Cement and Portland Pozzolana Cement.
07
Q.2 (a) Differentiate between setting and hardening of cement. 03
(b) Describe the wet process of manufacturing of cement in the flow
chart.
04
(c) Describe the test for determining initial and final setting time of
cement.
07
OR
(c) What is sustainability of concrete? How to make concrete sustainable
according to your viewpoint?
07
Q.3 (a) List out the factors affecting the workability of concrete and explain
anyone in detail.
03
(b) Differentiate between volume batching and weigh batching in
concrete mix procedure.
04
(c) State the different methods of concrete curing and explain anyone in
detail.
07
OR
Q.3 (a) List out the factors affecting the segregation & explain anyone. 03
(b) List out various types of special concreting techniques & write the
merits of ready-mixed concrete.
04
(c) List out a minimum of seven types of special concrete & describe
lightweight aggregate concrete.
07
Q.4 (a) Write down the purpose of adding Chemical Admixtures in concrete. 03
(b) List out the factors affecting shrinkage and explain any one in detail. 04
(c) Write down the factors affecting the strength of concrete & describe
any three in detail.
07
OR
Q.4 (a) Why compressive strength of concrete performed on 7 days and 28
days? Give your comments on that.
03
(b) List various crack repair techniques and explain any one in detail. 04
(c) Describe the Rebound Hammer Test with the labelled sketch. Write
down the limitations of this test method.
07
Q.5 (a) Explain in brief about freezing and thawing effect of concrete. 03
(b) Write down the various advantages of Quality control of the concrete
mix.
04
2
(c) In which cases the nominal mix and design mix is used? Describe step
by step procedure of concrete mix design as per IS code.
07
OR
Q.5 (a) Briefly explain the Alkali-aggregate reaction. 03
(b) Explain Sulphate Attack on concrete. 04
(c) List out the factors affecting the permeability of concrete. Explain any
two out of them.
07
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This post was last modified on 20 February 2020