JNTU Kakinada B-Tech 2-2 RT22015 CONCRETE TECHNNOLOGY R13 April 2018 Question Paper

Code No: RT22015
II B. Tech II Semester Supplementary Examinations, April-2018
CONCRETE TECHNNOLOGY (Civil Engineering)Time: 3 hours Max. Marks: 70
Note: 1. Question Paper consists of two parts (Part-A and Part-B) 2. Answer ALL the question in Part-A
3. Answer any THREE Questions from Part-B
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PART ?A
1. a)Define specific gravity.
3M
b)What is placing of concrete?
4M
c)Define maturity concept.
3M
d)Write about nature of creep.
4M
e)What are the statical methods of mix design
4M
f)What is self healing concrete?
4M
PART -B
2. a)Write about plasticizers and super plasticizers.
8M
b) What is the affect of size of aggregate on concrete?
8M
3. a)Write in detail about segregation and bleeding of concrete.
10M
b) What is the effect of time and temperature on workability?
6M
4. a)What are the factors affecting the strength of concrete?
8M
b) Write about Abram?s law and Gel space ratio.
8M
5. Write in detail about elasticity, creep and shrinkage of concrete.
16M
6. Design a concrete mix for characteristic strength of 25MPa at 28 days with a
standard deviation of 4MPa.The specific gravity of FA and CA are 2.64 and 2.74
respectively. A slump of 40mm is necessary. The specific gravity of cement is
3.15.Assuming the necessary data design the mix as per IS code method
16M
7. Write about different special concretes. How they are different from conventional
concrete? Explain.
16M

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