¬¬¬¬¬Enhancement Of Properties of Concrete by Optimizing the Proportions of Hybrid Mineral Admixtures and Sugarcane Bagasse Ash

­­­­­Enhancement Of Properties of Concrete by Optimizing the Proportions of Hybrid Mineral Admixtures and Sugarcane Bagasse Ash

SUDHAN NARAYANAN G1, NARMADHA S2, NITHYA M3  ,SUGANYA R4

1Sudhan Narayanan G Structural Engineering & Dhirajlal Gandhi College of Technology

2Narmadha S, Assistant Professor,Civil Engineering &  Dhirajlal Gandhi College of Technology

 3Nithya M, Assistant Professor,Civil Engineering &  Dhirajlal Gandhi College of Technology

4Suganya R, Assistant Professor,Civil Engineering &  Dhirajlal Gandhi College of Technology

---------------------------------------------------------------------***---------------------------------------------------------------------

Abstract - concrete is the most widely used construction material in India with annual consumption exceeding 100 million cubic meters. It is well known that conventional concrete designed on the basis of compressive strength does not meet many functional requirements such as impermeability, resistance to frost, thermal cracking adequately.
The production of the Portland cement as a main constituent of concrete has basically led to the dangerous impacts on our environment by releasing substantive amount of C02. Production of one ton of Portland cement emits one ton of C02 and other greenhouse gases. Hence the cement must be effectively replaced by some other cementitious materials without compromising the desired properties of concrete.

               The coal based power plant generates a huge amount of fly ash which is collected from electrostatic precipitator and Silica fume is a by-product of producing silicon metal or ferrosilicon alloys in smelters using electric arc furnaces. Disposal of these wastes may require huge land surface or any water bodies which in turn affects the environment, so recycling of these waste is indeed required.

           The purpose of this study is to find the suitability of Fly Ash and Silica Fume as hybrid admixture replacement materials for cement without compromising the strength & durability of conventional cement based hybrid concrete. Replacement of cement partially by Fly Ash and Silica Fume also reduces the supply demand on cement and may also reduce the emission of C02 in to atmosphere.

The physical and chemical properties of Fly Ash and Silica Fume has been studied and both the industrial wastes are used to replace the cement at 25%F.A-5%S.F, 20%F.A,10%S.F,15%F.A-15%S.Fand10%F.A-20%S.F.And sugarcane bagasse ash used ratios were 10%, 15%, 20%and 25%.These specimens will be tested for its mechanical properties such as compressive strength, split tensile strength and flexural strength on 7, 28 & 90 days and durability properties like acid attack, sulphate attack, acid attack and water permeability.

After determining the properties of the concrete mixes, the optimum percentage of replacement levels of Fly Ash, Silica Fume and sugarcane baggage ash will be found out for the optimized concrete Mix..

Key Words:  Fly Ash, Silica Fume, sugarcane baggage ash, Hybrid Mineral Admixtures