Innovative Fly Ash Geopolymer-Epoxy Composites: Preparation, Microstructure and Mechanical Properties

Area of Science:

• Materials Science
• Civil Engineering
• Polymer Chemistry

Background:

• Geopolymers are inorganic binders with potential for sustainable construction.
• Fly ash is an industrial byproduct often requiring disposal.
• Epoxy resins offer tunable mechanical properties and adhesion.

Purpose of the Study:

• To develop and characterize novel composite materials from fly ash-based geopolymers and epoxy resins.
• To investigate the compatibility and mechanical performance of these new composites.
• To explore their potential as low-cost, sustainable building materials.

Main Methods:

• A synthetic method involving concurrent reticulation of organic (epoxy) and inorganic (geopolymer) components.
• Formation of hydrogen bonding between geopolymer and epoxy phases.
• Characterization of mechanical properties and comparison with neat geopolymers and metakaolin-based composites.

Main Results:

• High compatibility between fly ash geopolymer and epoxy resin phases due to hydrogen bonding.
• Significantly improved mechanical properties compared to neat geopolymers.
• Comparable performance to composites made with more expensive raw materials like metakaolin.

Conclusions:

• Novel, low-cost aluminosilicate binders were successfully produced using industrial byproducts.
• The composites exhibit excellent thixotropicity and adhesion for building applications.
• These materials represent a promising advancement in sustainable building technology.