Factors affecting the suitability of fly ash as source material for geopolymers

By E. I. Díaz, E. Allouche, S. Eklund. 2010

513 citations recorded by the source corpus.

Subfields: Building and Construction, Ceramics and Composites, Civil and Structural Engineering

View Paper: https://www.semanticscholar.org/paper/486e5e954d82b448187bbdb92df85782383a2be6

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In Building and Construction

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Citations in the corpus

Impact of Alkali Silica Reaction on Fly Ash-Based Geopolymer Concrete (2013, background): “The two primary ingredients of geopolymer binders are alkaline liquids and powder materials that are rich in silica and alumina, such as kaolinite and fly ash (Diaz et al. 2010).”
Optimum mix design of geopolymer pastes and concretes cured in ambient condition based on compressive strength, setting time and workability (2019, background): “With the increase of CaO content, the 54 compressive strength of geopolymer materials increases and the setting time decreases [9, 12, 15, 16].”
Quantitative study of the reactivity of fly ash in geopolymerization by FTIR (2012, background): “Many previous studies have observed the significance of elements of Al, K, Na, Ca and Mg for the dissolution of fly ash glasses and the formation of secondary gels, particularly calcium silicate hydrates (C–(A)–S–H) [12,18,24].”
The effects of ground granulated blast-furnace slag blending with fly ash and activator content on the workability and strength properties of geopolymer concrete cured at ambient temperature (2014, background): “The chemical reaction and the rate of strength development of geopolymer concrete are influenced by several factors based on chemical compositions of the source materials, alkaline activators and curing condition [8, 9, 10].”
Effects of nano-silica on the strength development of geopolymer cured at room temperature (2015, background): “Higher amount of fine particles will result in higher surface area, and therefore higher reactivity, resulting in higher compressive strength [12].”
Hardening evolution of geopolymers from setting to equilibrium: A review (2020, background): “Obtaining similar mechanical properties has not been shown for waste materials due to unknown reactivity, heterogeneity, and contamination [38, 69].”
Effect of GGBFS on setting, workability and early strength properties of fly ash geopolymer concrete cured in ambient condition (2014, background): “Although the alkali activation mechanism is still ambiguous, the final products of geopolymerization are commonly influenced mainly by the chemical composition of the alkaline activators and source materials [7–9].”
Sorptivity and acid resistance of ambient-cured geopolymer mortars containing nano-silica (2016, background): “Several factors 35 such as reactivity of the source materials [7], curing temperature, alkaline activator to source 36 material ratio [3, 8, 9] and the type of alkaline activator play important roles in the 37 geopolymerization process.”
Early Age Properties of Low-calcium Fly Ash Geopolymer Concrete Suitable for Ambient Curing☆ (2015, background): “However, the geopolymerisation process and the resulting products may also be influenced by other factors such as, the type and properties of aluminosilicate sources and composition of alkaline solution [9, 13, 20].”
Fly ash-based geopolymer: clean production, properties and applications (2016, background): “…the fly ash or from an external calcium-content additives, to form calcium silicate hydrate gel (C-S-H), calcium aluminate hydrate gel (C-A-H) or calcium aluminum silicate gel (C-A-S-H) (C = CaO, S = SiO2, A = Al2O3, H = H2O) in the presence of water (Diaz et al., 2010; Chindaprasirt et al., 2011).”