Effects of EOGO in Metakaolin-Based Geopolymer

Area of Science:

• Materials Science
• Civil Engineering
• Nanotechnology

Background:

• Geopolymer concrete offers a sustainable alternative to Portland cement, reducing carbon emissions.
• Metakaolin-based geopolymers are a key area of research for eco-friendly construction materials.
• Carbon-based nanomaterials show promise for enhancing cementitious composites.

Purpose of the Study:

• To investigate the impact of Edge-Oxidized Graphene Oxide (EOGO) on the mechanical and rheological properties of metakaolin-based geopolymer concrete.
• To determine the optimal concentration of EOGO for improving geopolymer performance.
• To explore the potential of EOGO as an additive for sustainable construction materials.

Main Methods:

• Incorporation of EOGO at varying percentages (0%, 0.1%, 0.5%, 1%) into a metakaolin-based geopolymer mixture.
• Characterization of metakaolin-EOGO (MKGO) geopolymer properties through compressive strength, free-free resonance column (FFRC), void content, and water absorption tests.
• Evaluation of rheological properties, including setting time and fluidity.

Main Results:

• Maximum compressive strength and stiffness were observed at 0.1% EOGO addition.
• Void content was minimized at the 0.1% EOGO concentration.
• Increased EOGO content led to shorter setting times and decreased fluidity.

Conclusions:

• Edge-Oxidized Graphene Oxide (EOGO) effectively enhances the mechanical performance of metakaolin-based geopolymers.
• 0.1% EOGO is identified as the optimal content for improving geopolymer paste properties.
• EOGO presents a viable additive for developing advanced and sustainable construction materials.