Abstract

This paper presents the results of an experimental investigation carried out on strength and durability properties of plain and blended cement concrete exposed to sea water. The mix design is targeted for M30 grade concrete. The plain cement concrete samples made 0 % replacement of fly ash (FA) with cement and the blended concrete samples made 10, 20, 30, 40 and 50 % replacement of FA with cement. Another blended cement concrete samples also made with 10 % replacement of FA and 10, 20, 30, and 40 % replacement of silpozz (silica fume) (SF) with cement. Two set of samples (cube) have been prepared. One set of sample, after 28 days of normal water curing (NWC) was being immersed in sea water for 7, 28 and 90 days and the other set of samples have been cured in normal water for 7, 28 and 90 days and their compressive strength measured. The investigation reflects that the percentage increase in compressive strength for blended cement concrete in NWC is better than the samples in sea water curing (SWC) after 28 days of NWC. The water soluble chloride and acid soluble chloride were found less for blended cement concretes up to 10 % replacement of FA and 30 % replacement of SF with cement.

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