Toward an indexing approach to evaluate fly ashes for geopolymer manufacture
By Zuhua Zhang, J. Provis, Jin Zou, A. Reid, Hao Wang. 2016
143 citations recorded by the source corpus.
Variations between fly ashes can lead to significant differences in the geopolymers derived from them, in both microstructural and mechanical properties. This study assesses the effect of physical, crystallographic and chemical characteristics of fly ash on geopolymerisation performance and the strength of the resulting binders. Physical and glass chemistry factors are combined to develop a comprehensive index to evaluate the suitability of fly ashes for the production of high-strength geopolymers. An equation for this index is proposed, developed using five typical low-calcium fly ashes and then validated against a further eight literature datasets, showing a good relationship between the ranking order of the calculated index and the compressive strengths of geopolymer pastes produced with comparable activator and paste workability. This index can be used to screen the source materials, which is of significant value in moving alkali activated cements towards acceptance in practice.
Subfields: Building and Construction, Civil and Structural Engineering
View Paper: https://www.semanticscholar.org/paper/88250aa96e56dcc102dfc3a188ad98d9fc15f4d4
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In Building and Construction
In Civil and Structural Engineering
Citations in the corpus
- Clean production and properties of geopolymer concrete; A review (2020, background): “15–90 Steam-cured specimens exhibited higher strength than autoclaved specimens (Zhang et al., 2016)”