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Strength of RC Beams Incorporating Geopolymer Concrete

Sourabh Kumar, Harsh Rathore

Abstract


This study evaluates the flexural behavior of Geopolymer Concrete (GPC) beams through theoretical and experimental analyses, focusing on ultimate load, ultimate deflection, and deflection at the service load. Higher tensile reinforcement correlates with increased ultimate loads, akin to conventional reinforced cement concrete beams. Experimental loads consistently surpass theoretical values, with initial crack formation observed in specific load ranges. Notably, beams incorporating Ground Granulated Blast Furnace Slag (GGBS) in GPC demonstrate improved cracking and deflection, particularly with up to 25% fly ash replacement. Beam FAGB3, with 25% GGBS, exhibits a 40.02% higher ultimate load compared to FAGB1. Post-failure assessments reveal flexure failure without horizontal cracks, affirming adequate bond strength. Service load calculations further inform the beams' performance. In summary, this study elucidates the influential role of reinforcement and the favorable impact of GGBS on GPC beam behavior, providing insights for optimized mix designs in practical applications.


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References


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