Workability
How much is slump?
Slump observed is less than 75
What should be compressive strength of M20 grade concrete?
The compressive strength should be atleast 20 Mpa
How a specimen is accepted when tested for acid resistance?
Loss of Compressive strength should not be more than 10%
How much should be the compaction factor for concrete?
It should be between Between 0.75 to 0.95
How a cylinder sample is loaded in CTM machine while testing for Split Tensile strength of concrete?
Axis of cylinder specimen to be perpendicular to Axis of loading.
Which chemical is mostly opted when testing for alkali resistance of concrete?
NaoH (Sodium Hydroxide)
How much is vee bee time for concrete?
It should be between 6 to 12 seconds.
What is value of Modulous of Elasticity of concrete?
Answer is 5400 (square root of fck)
How carbonation depth is related to strength while testing for chloride penetratin?
Inversely proportional