Concrete Technology, Question Paper of Civil Engineering 4th Semester, Download Question Paper 3

S .B. Roll no _____

CONCRETE TECHNOLOGY

4^th Exam / civil / 5107/ May’06

Duration 3 hrs

Section – A

1.     Fill in the blanks

a.     Concrete is a mixture cement , fine aggregate _____ and water.

b.     ______ concrete is liable to shrink on drying.

c.      In fineness test of ordinary portend cement the residue on sieve No. 9 should not be more than ___

d.     Duff abrahm establish the law of _______

e.      To determine the consistency of concrete ________ test is performed.

f.       The ratio of various ingredients in concrete of grade M 200 is ______

g.     The cement bags should be stored ______- mm from the walls.

h.     The sand used should be _______ in order to prevent bleeding.

i.       The finishing should be  delayed in order to avoid the formation of ______

j.           Curing compound should be used for hastening the _________

Section –B

Note : Attempt any five questions

2.       

a.     What is the difference between concrete and mortar?

b.     Why bulking of sand is taken into consideration  in concrete mix?

c.      Indicate the order in which C2 S, C3S, C4AF and C3A reacts when , comes in contact with water.

d.     Why do you mean by fineness modulus?

e.      Why the cement should not be allowed come in moisture contact?

f.       Name out the desired properties of freshly mixed or plastic concrete.

Section – C

3.       

a.      Differentiate between any four of the following pair of words or statements.

b.     Weigh batching ad volume batching of aggregate of concrete.

c.      Accelerator and retarders in concrete.

d.     Plaine cement concrete and reinforced cement concrete

e.      M150 and M 200 grade of concrete.

f.       Initial setting time and final setting time of cement.

Section – D

Note : Attempt any three questions

4.     What are the advantages and disadvantages of concrete over other building materials? Like bricks. Timber, lime, steel etc?

5.     Explain the effect of water – cement ratio, specimen size , humidity and grading of aggregates on compressive strength of concrete.

6.     Describe with their advantages, the different methods of curing the concrete work.

7.     With the help of neat proportionate sketch. Describe the slump cone test’ for concrete. Why this test is performed?