Performance Evaluation Of M60 Concrete Incorporating Ggbs And Alccofine As Partial Cement Replacements

Abstract

This Paper Evaluates The Mechanical Performance Of M60 Concrete In Which Ordinary Portland Cement Is Partially Replaced By Ground Granulated Blast-furnace Slag (GGBS) And Alccofine 1203. A Constant Total Binder Content Of 450 Kg/m³, Water Content Of 135 Kg/m³ And Water-to-binder Ratio Of 0.30 Were Used. The Experimental Matrix Comprised A Control, Binary GGBS Mixtures At 20%, 30% And 40%, And Ternary Mixtures Containing 30% GGBS With 5%, 10%, 15% And 20% Alccofine. Absolute-volume Mix Calculations, Batching, Mould Preparation, Mixing, Compaction, Water Curing And Strength Testing Were Organized In Accordance With Relevant Indian Standards. Three Specimens Were Considered For Cube Compression, Cylinder Compression, Split Tension And Flexure At 7, 14 And 28 Days. The Final Report Dataset Showed That M60-G30A10 Achieved The Highest 28-day Cube Compressive Strength Of 79.40 MPa, Cylinder Compressive Strength Of 65.20 MPa, Split-tensile Strength Of 5.07 MPa And Flexural Strength Of 7.31 MPa. These Values Exceeded Control Concrete By 15.6%, 15.8%, 13.2% And 15.1%, Respectively. The Performance Gain Is Attributed To Improved Packing, Hydration Nucleation, Additional C-S-H Formation And Interfacial-transition-zone Densification. Increasing Alccofine Beyond 10% Reduced Marginal Efficiency Because Of Higher Surface Demand And Clinker Dilution. The Preferred Binder Is Therefore 60% OPC, 30% GGBS And 10% Alccofine, Subject To Independent Durability And Field-scale Validation.

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