what is the allowable silt % in river sand for Dam
concreting.

Answer Posted / pradeep k sharma

AS PER IS CODE, IT IS 3% ,BUT CONSIDERING THE COMPULSION TO
USE THE AVAILABLE RIVER SAND IN THE NEAR BY, THIS LIMIT CAN
BE INCREASED UP TO 5% ,IF ADVERSE EFFECT IS NOT OBSERVED ON
THE STRENGTH OF CONCRET CUBES TESTED BY CONDUCTING TRIAL
MIX TEST IN LABORATORY,IT IS UP TO THE DESCRETION OF
ENGINEER IN-CHARGE TO AMEND THE LIMITS GIVING DUE WEIGHTAGE
TO ALL THE FACTORS AS MENTIONED.

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