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Journal of Engineering Research

Journal of Engineering Research

DOI

10.70259/engJER.2024.861837

Abstract

The current study explores the potential of utilizing Waste glass powder (WGP) as an alternative to cement in the development of sustainable eco-friendly Ultra-high-performance concrete (UHPC). UHPC mixtures underwent optimization through the application of a Modified Andreasen and Andersen (MAA) particle packing model, resulting in a reduction of cement content from 900 to 800 kg/m3. Six mixes were cast, with varying levels of cement replacement ratios with WGP up to 50%. The evaluation focuses on the flowability, dry density, and mechanical properties of UHPC at different ages using normal curing. A statistical model utilizing response surface methodology (RSM) was employed to formulate and optimize sustainable UHPC mixtures that incorporate WGP. This approach was used to validate the effectiveness of the model by predicting the flowability and mechanical properties of UHPC in comparison to the MAA model. Cement and WGP were employed as two variables in the response surface methodology model. The models' validity was assessed through the application of analysis of variance (ANOVA). The results show that at a WGP proportion of 50%, the flow diameter attains its peak with a 10% increase, the microstructure of concrete is improved by substituting 20% of the cement with WGP, which increases the compressive and tensile strengths by 5% and 7% respectively, after 90 days of normal curing when compared to the reference combination. The RSM model exhibited a significant determination coefficient (R2) of 0.9783 for flowability, 0.9863 for compressive strength and 0.9573 for splitting tensile strength after 28 days.

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