Skip to Main content Skip to Navigation
Journal articles

Characteristics and applications of flash metakaolins

Abstract : This paper presents physical, chemical and mechanical characteristics of metakaolins obtained from an industrial flash calciner, in order to compare their properties with standard industrial metakaolin produced in a rotary kiln calciner. Three kaolins, with three levels of purity, were calcined by these two different methods to give six different metakaolins for the study. The results showed that the method of calcination did not affect the chemical composition of the metakaolins formed but did influence their physical properties and performance as a supplementary cementitious material when blended with Portland cement, and in geopolymer synthesis. Flash metakaolins have a lower water demand than rotary metakaolins, which can be explained by the morphological properties of the flash metakaolin, induced by the calcination process. Traditional rotary-calcined metakaolins tend to be angular layered particles, whereas flash metakaolins contain spherical particles. Mechanical test results showed that the two methods of calcination can lead to metakaolins with equivalent performance in the synthesis of construction materials. (C) 2013 Elsevier B.V. All rights reserved.
Document type :
Journal articles
Complete list of metadatas

https://hal.insa-toulouse.fr/hal-01850824
Contributor : Insa Toulouse Scd <>
Submitted on : Friday, July 27, 2018 - 5:10:01 PM
Last modification on : Friday, January 10, 2020 - 9:09:32 PM

Identifiers

Citation

R. San Nicolas, Martin Cyr, Gilles Escadeillas. Characteristics and applications of flash metakaolins. Applied Clay Science, Elsevier, 2013, 83-84, pp.253--262. ⟨10.1016/j.clay.2013.08.036⟩. ⟨hal-01850824⟩

Share

Metrics

Record views

130