EFFECT OF INDUCED CARBONATION ON HAREDEN PROPERTIES OF M30 AND M35GRADE CONCRETE USING ORDINARY PORTLAND CEMENT

Abstract

An experimental investigation was carried out to find harden properties of M30 and M35 grade of concrete using Ordinary Portland cement with water cement ratio 0.42 for M30 and 0.40 for M35 grade concrete were used in this study. In this experimental study carbonation is assessed using a solution of 0.2% phenolphthalein indicator. Normal concrete is indicated in pink colouration. Where as no change in colour indicates that concrete is affected by carbonation. The Mix design is carried out as per BIS (1026-2009).Compressive strength test, split tensile strength test and the flexural strength test were carried out to find effect of carbonation on hardened properties of carbonated concrete and normal concrete. A comparative study is carried out in between normal concrete and carbonated concrete for 3rd day, 7thday and 28th day test samples. The result shows that carbonation concrete has a higher compressive strength as compared to non carbonated concrete cubes. The result shows that the split tensile strength and flexural
strength of carbonated concrete increase as compared to noncarbonated concrete of 3rd day,7thday and 28th day test samples.