- Which one is NOT the normal component of plain concrete?
Cement
Gravel
Sand
Air
Steel Rods
- What is the possible range of strength of concrete that younormally use in residential construction?
500-1000 psi
3000-5000 psi
30,000-50,000 psi
300,000-500,000 psi
- Which of the following statements about coarse aggregate inconcrete is NOT true?
Aggregates should be relatively free from flat and elongatedparticles
Uniform size (same size) coarse aggregates are good for makingconcrete.
Well graded coarse aggregate is best for making concrete.
Heavily porous coarse aggregate is not good for makingconcrete.
