COMPRESSIVE STRENGTH AND CARBONATION OF SEA WATER CURED BLENDED CONCRETE

This paper investigates the influence of sea water on pre-cast concrete containing industrial by-product materials such as fly ash (FA) and silpozz. The mix design is targeted for M30 grade concrete. Ten concrete mixtures were designed to have the same degree of workability with water to cementitious material ratio of 0.43. The studied parameters include the compressive strength of normal water curing (NWC) and sea water curing (SWC) samples after 28 days of NWC for 7, 28, 90, 180 and 365 days curing period. The carbonation depth of concrete samples for 28, 90, 180 and 365 days SWC after 28 days of NWC was measured. It was found that the higher the FA content the higher is the carbonation process occurred. The percentage increase in compressive strength for blended cement concrete in NWC is better than the samples in SWC after 28 days of NWC.