In the quest for sustainable and innovative construction materials, a recent study has shed light on the rheological behavior of geopolymer dope solutions, potentially opening new avenues for the energy sector. Led by Ahmed Iqbal from the Department of Mechanical Engineering at King Abdulaziz University in Saudi Arabia, the research explores how different temperatures affect the workability of geopolymer solutions, which could have significant commercial implications.
Geopolymers, known for their semi-crystalline and amorphous structure, are derived from aluminosilicate sources. In this study, sugarcane bagasse ash (SCBA), a non-toxic biowaste material rich in carbon and aluminosilicate, was used as the base intermediate for geopolymer synthesis. The research involved preparing alkaline activators (AAs) at various temperatures, ranging from 5 to 60°C, to investigate their influence on the rheological properties of geopolymer dope solutions.
The findings revealed that the apparent viscosity and shear stress behavior of the 30 and 50% AA solutions made at 5 and 60°C were higher than those under ambient conditions. “A solution with a 50% sodium hydroxide (NaOH) content yields comparable outcomes,” Iqbal noted. “The geopolymer dope solutions also showed significant changes in their rheological characteristics under different processing conditions, which likely led to the formation of product clusters.”
The study highlights that the viscous geopolymer solution results from the formation of a rigid aluminosilicate oligomer and monomer network during geopolymerization. This discovery could be a game-changer for the energy sector, particularly in applications requiring high-strength, durable materials with enhanced workability.
The modified Bingham model and the Herschel–Bulkley model were found suitable for evaluating the rheological behavior of the SCBA geopolymer dope solution. These models could provide a framework for future research and practical applications, ensuring that geopolymers meet the stringent requirements of various industries.
Published in the journal ‘Applied Rheology’ (translated to English as ‘Applied Rheology’), this research underscores the potential of geopolymers in sustainable construction. As the world shifts towards greener technologies, understanding the rheological behavior of geopolymer dope solutions could pave the way for innovative and eco-friendly building materials.
The implications of this research are vast, particularly for the energy sector, where the demand for high-performance, sustainable materials is on the rise. By optimizing the processing conditions of geopolymer dopes, industries can achieve significant improvements in material properties, leading to more efficient and environmentally friendly construction practices.
As Iqbal’s research demonstrates, the future of geopolymers looks promising. With further advancements, these materials could become a cornerstone of sustainable construction, offering a viable alternative to traditional cement-based materials. The journey towards a greener future is underway, and geopolymers are at the forefront of this exciting evolution.