Which cement is used to create bond with old concrete surface?

After placing each layer in a slump cone, the concrete in the cone is tapped to remove remaining voids.

C3 S and C2S require approximately the _________ amount of water for hydration.

Which apparatus is generally used to measure the soundness of the cement?

Which of the following option is correct?

What is standard consistency?

If L1=Measurement taken after 24 hours of immersion in water at a temp. of 27 ± 20oC and L2=Measurement taken after 3 ho…

If t1=Time at which water is first added to cement, t2=Time when needle fails to penetrate 5 mm to 7 mm from bottom of t…