Quantitative determination of phases in the alkaline activation of fly ash. Part II: Degree of reaction

By A. Fernández-Jiménez, Á. G. Torre, A. Palomo, G. López-Olmo, M. Alonso, M. Aranda. 2006

227 citations recorded by the source corpus.

A working procedure was developed for determining the degree of reaction of fly ash subjected to alkali activation (with 8 M NaOH) at mild temperatures. Since the reaction products dissolve in HCl, the residue left after this acid attack contains only the fraction of the original ash that failed to react with the basic solution. This residue was analysed with Rietveld XRPD quantification and NMR and the findings were compared to the results of the analyses run on the activated ash to obtain a very precise quantification of all of the (crystalline, vitreous and amorphous) phases present in the systems studied.

Subfields: Civil and Structural Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/8330b20ee9ceaecbc24884b108a702e68edc2a28

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In Civil and Structural Engineering

1. Zuhua Zhang
2. J. Provis
3. Hao Wang
4. A. Reid
5. J. V. van Deventer
6. A. Hajimohammadi
7. Jin Zou
8. S. A. Bernal

In Materials Chemistry

1. Zuhua Zhang
2. J. Provis
3. Hao Wang
4. J. V. van Deventer
5. A. Reid
6. A. Hajimohammadi
7. Jin Zou
8. S. A. Bernal

Citations in the corpus

• Toward an indexing approach to evaluate fly ashes for geopolymer manufacture (2016, background): “in the range 15 to 35% after 48 h curing at 65 °C and 7 days age ing at 25°C [35, 36], although this may be increased to up to 60% by extending high temperature curi ng to 7 days at 85°C [37].”
• Quantitative study of the reactivity of fly ash in geopolymerization by FTIR (2012, background): “The glassy phases or other amorphous phases present in fly ash are regarded as reactive components for geopolymer synthesis because of their higher dissolution extent under alkaline condition compared to the crystalline phases, such as mullite and quartz [14,23].”
• One-Part Geopolymer Mixes from Geothermal Silica and Sodium Aluminate (2008, result): “These results show that the process of development of the geopolymer gel in the ‘just add water’ system studied here is relatively similar to the gel formation process in fly ash geopolymerization as was previously studied by this technique.[15-18] Both systems, although chemically very different, s”