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i agree with experts answers
Due to the excessive presence of salts in raw material,it react with already present in the cement C3A,C3S,C2A,C2S which are after water addition change and make new compounds,then access of
chloride effect the steel and enhance the oxidation process which resultant early corrosion,and sulphte
react with concrete and decrease its durability.
For more information Properties of concrete by dr a m noveli