Abstract:

In the modern era, global warming and environmental sustainability are major concerns, with carbon dioxide (CO₂) emissions playing a significant role in climate change. Cement production is one of the largest contributors to CO₂ emissions, accounting for a substantial percentage of global greenhouse gas emissions. India, being the second-largest cement producer after China, faces the challenge of reducing cement usage in construction without compromising structural performance. This study explores an eco-friendly alternative by replacing conventional cement with fly ash and partially replacing natural river sand with marble dust in geopolymer concrete, thereby reducing CO₂ emissions and promoting waste reutilization. The research focuses on developing geopolymer concrete by using a sodium hydroxide (NaOH) solution with 14M molarity as an alkaline activator and replacing river sand with marble dust at varying proportions of 25%, 50%, 75%, and 100%. The mechanical properties of the modified geopolymer concrete were evaluated under heat curing (60°C & 80°C) and ambient curing conditions (7, 14, and 28 days). A comparative study was conducted to assess the impact of marble dust replacement on compressive strength and overall durability.

Description:

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