Study On Stress – Strain Behaviour of Hardened Concrete with HVFA, GGBS AND GBS as Partial Replacement Materials
Suvarna Latha Kakara1, M V Seshagiri Rao2
1K.Suvarna Latha, Department of Civil Engineering, JNTUH College of Engineering, Hyderabad, India.
2M.V. Seshagiri Rao, Department of Civil Engineering, JNTUH College of Engineering, Hyderabad, India.
Manuscript received on March 02, 2013. | Revised Manuscript received on April 13, 2013. | Manuscript published on April 30, 2013. | PP: 813-820 | Volume-2, Issue-4, April 2013. | Retrieval Number: D1602042413/2013©BEIESP

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Abstract: Concrete is the most widely used construction material developed by man. Because of its superior specialty of being cast in any desirable shape, it has replaced stone and brick masonry. Inspite of all this,it has some serious deficiencies which, but for its, remarkable qualities of flexibility, resistance and ability to redistribute stress, would have prevented its use as a building material. Prediction of concrete strength and stress strain behaviour of concrete is an important issue in the concrete industry, since the traditional laboratory approach to determine the strength of concrete attracts some drawbacks such as manual involvement, time consumption and chances of creeping of human error. This paper reports the results of an experimental study, conducted to evaluate the stress-strain behaviour of hardened concrete by partially replacing the concrete by partially replacing the cement by Ground granulated blast furnace slag and High volume Fly ash (GGBS and HVFA)by 0%, 10%, 20%, 30%, 40%, 50%, 60% and 70% for each grade of concrete, M20, M40 and M60 at different ages of 28 days. By taking grade of concrete percentage replacement of GGBS and water cement ratio as the controlling parameters.Another experimental study is also carried out by replacing the sand with Granulated Blast Furnace Slag (GBScoarse) which confirming to zone- II category by 0% to 70% for each grade of concrete M20,M40,and M60 at28 days. From these study analytical equations for the stress– strain behaviour of hardened concrete has been arrived and stress – strain curves were plotted. The experimental and theoretical stress strains are shows good correlation.
Keywords: GBS (coarse) zone-II, Ground Granulated Blast Furnace Slag (GGBS), Hardened concrete, HVFA, Saenz’s model equation.