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

S .B. Roll no _____

CONCRETE TECHNOLOGY

4^th Exam / civil / 5107/ May’07

Duration 3 hrs

Section – A

1.     Fill in the blanks

a.     Water cement ratio is valid when concrete is __________ compacted.

b.     Slump is measure in _________

c.      Tensile strength  of concrete is about ____ % of its compressive strength.

d.     Ordinary concrete has ______ grades.

e.      Expansion joints are provided to control _____ cracks.

f.       Hydration of cement increases with the ________ in temperature.

g.     Residue on IS sieve No.9 of ordinary cement for fineness test should not be  more than___

h.     Lesser is the size of aggregate ________ is the quantity of cement.

i.       Bulk density of aggregate is ________ than its sp. Gr.

j.       Cement bags should be stored ______- cm away from walls.

Section –B

2.     Attempt any five questions

a.     Write precautions to  be observed while perfuming slump test.

b.     What is flakiness    index? Explain with example.

c.      List precautions to be taken before defective concrete is repaired

d.     Write ate importance of quality control of concrete

e.      List properties of fresh concrete.

f.       Name three pigments used to given colour to concrete  surface mar face gets.

Section –C

3.     Differentiate between any four

a.     Fine aggregates and coarse aggregates

b.     Low heat cement and rapid hardening cement .

c.      Bulking and bulk density.

d.     Accelerators and retarders for concrete making.

e.      Batching of water and batching of aggregates.

f.       Consistency and work ability.

Note : Attempt any three questions.

4.     What we mean by freezing and thawing of concrete road? How  you will protect it?

5.     Explain the purpose of providing construction and contraction joints in concrete. What do you mean by curing concrete?

6.     What do you mean by curing concrete?

7.     What are deleterious material in an aggregate ? what are their harmful effects?