In a significant stride towards sustainable construction, researchers have developed an eco-friendly geopolymer binder that could revolutionize pavement applications. The study, led by Teerapon Saowapan from the Department of Civil Engineering, explores the potential of blending fly ash with waste materials like bagasse ash and calcium carbide residue to create a robust and environmentally friendly binder.
The research, published in the journal *Advances in Materials Science and Engineering* (which translates to “Advances in Materials Science and Engineering” in English), demonstrates that the geopolymer binder achieved impressive compressive strengths of 30–40 MPa. This was particularly true for mixes containing 85%–100% fly ash and those with 40%–60% bagasse ash and calcium carbide residue combined with 0%–20% fly ash.
Saowapan explained, “The key to our success lies in the microstructural densification of the geopolymer. By reducing porosity, we significantly enhanced the strength performance of the binder.” This finding was confirmed through advanced microstructural characterization techniques, including scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and x-ray diffractometry (XRD), as well as x-ray tomographic microscopy (XTM).
The implications for the construction and energy sectors are profound. Fly ash, a byproduct of coal combustion, has long been a challenge for energy producers seeking sustainable disposal methods. Similarly, bagasse ash and calcium carbide residue are industrial wastes that often end up in landfills. By repurposing these materials into a high-performance geopolymer binder, the research offers a dual benefit: reducing waste and creating a sustainable construction material.
“This research opens up new avenues for the energy sector to collaborate with construction industries,” said Saowapan. “It’s a win-win situation where waste materials are transformed into valuable resources, contributing to a circular economy.”
The study’s findings suggest that optimized blends of fly ash with waste materials can produce geopolymer binders with satisfactory strength, paving the way for sustainable solutions in pavement applications. As the world increasingly seeks eco-friendly alternatives, this research could shape future developments in the field, driving innovation and sustainability in construction practices.
In an era where environmental concerns are at the forefront, this breakthrough offers a promising solution that aligns with global efforts towards sustainability and waste reduction. The research not only highlights the potential of geopolymer binders but also underscores the importance of interdisciplinary collaboration in addressing contemporary challenges.