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Scarcity of potable water increases day by day. The use of self curing agent is very important from the pointview that water resources are getting valuable every day. Curing of concrete means maintaining moisture inside the bodyof concrete during the early days and beyond in order to develop the desired properties in terms of strength & durability.A good curing practice involves keeping the concrete damp until the concrete is strong enough to do its job.This study investigated the strength properties of Silica fume concrete. This work primarily deals with the strengthcharacteristics such as compressive, Split tensile and flexural strength. Self curing concrete a set of different concretemixture were cast and tested with different cement replacement levels (0%, 2.5%, 5%, 7.5% & 10% ) of Silica Fume (SF)by wt of Cement and/or each trial super plasticizer has been added at constant values to achieve a constant range ofslump for desired work ability with a constant water-binder (w/b) ratio of 0.42 for M40 Grade & 0.39 for M60 Grade.Specimens were produced and cured in a curing tank for 3, 7, 14 and 28 days for normal concrete and at roomtemperature for Self curing concrete. The cubes were subjected to compressive strength tests after density determinationat 3,7,14 and 28 days respectively. The chemical composition and physical composition of Silica Fume and cement weredetermined. The density of the concrete decreased with increased in percentage of Silica Fume replacement between10% to 20% led to a reduction in the compressive strength of hardened concrete. This study has shown that between7.5% to 10% replacement levels, concrete will develop strength sufficient for construction purposes. Its use will lead to areduction in cement quantity required for construction purposes and hence sustainability in the construction industry aswell as aid economic construction.This project consists of two stages. In the first stage, the effect of PEG400 on compressive strength by varying thepercentage of PEG400 by weight of cement from 0% to 2% were studied for M40, M60 mix. It was found that 0.5% ofPEG400 by weight of cement was optimum for M40, M60 grade concrete respectively, for achieving maximum strengthwithout compromising on workability.And in the second stage, a comparative study on flexural strength of beams with normal and self curing concretes forM40, M60 concrete beams of sizes 0.1X0.15X1.2m, 0.1X0.2X1.2m for over reinforced, under reinforced sections arefound at the age of 30days.A research study conducted to evaluate the flexural behaviour of self curing structural concrete. Testing of the materialswere done as per relevant IS codes, preparation of materials, weighing of materials and casting of cubes and mixing,compacting and curing of concrete are done according to IS 516: 1959. The plain samples of cubes were cured for 28days in water pond and the specimens with PEG400 were cured for 28 days at room temperature by placing them inshade. Then, the reinforced concrete beams were casted for finding out the flexural behaviour of normally curedconcrete and self curing concrete.In this project, the results indicated that use of PEG400 during mixing of concrete with 7.5% of silicafumereplacement improved the performance of concrete considerably.

Manjula. D, “Flexural Behaviour of Self Curing Concrete with partial replacement of Cement by Silica Fume”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 4, Issue 11, pp. 688-704, November 2017.