Experimental Investigation On The Behavior Of Blended Cement Motar Under The Effects Of Sulphates



               Cementatious materials have been used by mankind for construction from time immemorial. The every rising functional requirement of the structures and the capacity to resist the aggressive elements has necessitated developing the new cementatious materials. Concrete is an artificial material in which the aggregates both fine and coarse are bonded together by the cement when mixed with water. The most important part of the concrete is cement, whose production produces a lot of CO2. The most effective way to decrease the CO2 emission of cement industry is to substitute a proportion of cement with other materials. Blended cement is the best solution for the problem. Recent research works has been focused on the durability characteristics of the blended cement. This paper presents the effect of sulphates on the strength properties of the Blended Cement (fly ash based). For this purpose cement mortar cubes were casted using the deionized water in three different sulphate concentrations of 500, 1000, 1500, 2000, 2500, 3000 mg/l. The sulphates used in the present investigation are sodium sulphate, magnesium sulphate, ammonium sulphate and ferrous sulphate. The effect is studied with single, double and triple combination of the sulphates. Controlled sample specimen were casted using deionized water with no concentration for comparison. Specimens are tested for compressive strength by using compression testing machine. Testing is done at age of 7, 28 and 90 days. And from this investigation we can conclude that with this concentrations the effect on compressive strength of the blended cement is slightly less when compared with the controlled sample specimen. 

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