Answer / banambar pradhan

in cement conc., if water cement ratio excess in conc. then
during the period of casting , aggregate goes down and
cement slurry goes up. this process is called laitance

Answer / jagadish

the formation of weak powdery layer on the surface of
hardened concrete due to high water cement ratio is know as
laitance

Answer / pramod kumar, gurgaon

formation of cement paste at the surface of the casted slab
or road after worked up with the trovel. it is due to the
aggregate goes down and water comes up to the top surface
which produces dust in summer and mud in rainy season.

Answer / manikanta73

due to over compaction of concrete aggregates goes down and cement and water comes up and forms a layer called laitance

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