Concrete Technology, Question Paper of Civil Engineering 4th Semester, Download Question Paper 2

S .B. Roll no _____

CONCRETE TECHNOLOGY

4^th Exam / civil / 5161/ May’05

Duration 3 hrs

Section – A

1.     Fill in the blanks

a.     Fresh concrete is liable to ____ an drying.

b.     When fully saturated, the bulking of sand is ____

c.      The chemical reaction between cement and water is called ____ of cement.

d.     Concrete with higher compaction factor has ______ workability

e.      Quantity of cement measured by _____

State True of false

a.     Strength of cement decreased by long storage

b.     The ratio of cement sand : Aggregate in M15 is 1:1:2

c.      For compressive strength of cement, ordinary sand is used

d.     Concrete should have maximum shrinkage.

e.      At freezing point, concrete sets easily.

Choose the correct one

a.     Less the water cement ratio, (lesser/ greater) is the strength of concrete  

b.     Bulking of sand is (more/ less ) when the particles are fine.

c.      Concrete is (permeable / impermeable ) to moisture.

d.     If the slump is 20 mm, then the degree of workability is (high / low)

e.      The concrete in which preliminary tests are conducted is called (controlled / ordinary) concrete

Section –B

Note : attempt any ten questions.

2.      

a.     What are the desired properties of hardened concrete ?

b.     What are the constituents of cement?

c.      How gypsum delays the setting time?

d.     Why concrete should be workable?

e.      What do you mean by fineness mod?

f.       What is the importance of steerage of cement?

g.     What is weight batching of concrete?

h.     Define and list equipments for machine mixing of concrete ingredients.

i.       Define compaction of concrete and why done?

j.       Define bleeding. w/c ratio, w.r.t concrete

k.     Sketch one form work for column circular in shapes.

l.       What do you mean by flash? Explain in brief.

Section –C

Note : Attempt any three questions.

3.     Give the list of stages through which the entire concreting operations have to be completed

4.     List he different types of  Portiand cement , and special types of cement. Explain any one.

5.     Write short note on

a.     Effect of storage an strength of cement

b.     Curing of concrete

6.     Explain the various factors, which improve  the workability of concrete work.

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