Plain Cement Concrete (PCC)

Question 1

What is PCC composed of?

Answer 1

cement, fine aggregate(sand), course aggregate without steel

Question 2

Where is PCC laid?

Answer 2

it is laid directly om the soil surface to avoid direct contact of reinforcement of concrete with soil and water

Question 3

the coarse aggregate used in PCC must be:

Answer 3

1. of hard broken stone of granite/similar stone
2. free from dirt, dust and other foreign matter

Question 4

What should be the size of the stone?

Answer 4

20mm or smaller

Question 5

All the coarse material should be retained in a ___________ mesh

Answer 5

5mm square mesh

Question 6

The coarse material should be:

Answer 6

well graded so that the voids do not exceed 42%

Question 7

The fine aggregate used consists of:

Answer 7

coarse sand consisting of sharp and angular grains

Question 8

The fine aggregate should pass through a screen of ____________ mesh

Answer 8

5mm square mesh

Question 9

the sand should be of:

Answer 9

1. standard specifications
2. clean and free from dust, dirt and organic matter

Question 10

________ is normally used for plain cement concrete

Answer 10

Portland Pozzolana Cement(PPC)

Question 11

It should have the required:

Answer 11

1. tensile strength
2. compressive stresses

Question 12

Generally, potable water is used having a pH value -

Answer 12

not less than 6

Question 13

What is the proportioning of PCC generally used?

Answer 13

1:2:4 or 1:3:6