Zeta potential, gel formation and compressive strength of low calcium fly ash geopolymers
By Chamila Gunasekara, D. Law, Sujeeva Setunge, J. Sanjayan. 2015
172 citations recorded by the source corpus.
A major challenge in the specification of geopolymer mix designs is the variability in the fly ash used and the impact of that variability on the performance of the geopolymer produced. The factors affecting the performance of geopolymers made from a total of five chemically and physically distinct fly ashes are reported. The key factor identified as influencing the strength was the workability, with a flow in the range between 110 ± 5% and 140 ± 5% required for optimal performance. In this flow range, the strength of geopolymer is governed by the specific surface area of precursor fly ash coupled with the quantity of the 10 lm and 20 lm particles. In addition a negative zeta potential of the fly ash was identified as assisting gel formation with the smaller the negative zeta potential of the geopolymer product the more gel formation and high compressive strength observed.
Subfields: Civil and Structural Engineering, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/4355680ed686773270ba77daca3cdd89bed40233
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In Civil and Structural Engineering
Citations in the corpus
- Current Sustainable Trends of Using Waste Materials in Concrete—A Decade Review (2020, background): “The current decade review has highlighted that the majority of the available research on the use of waste materials in concrete focuses on short-term and long-term strength characteristics only [377– 379].”