Do geopolymers actually contain nanocrystalline zeolites? A reexamination of existing results

JL Provis, GC Lukey, JSJ Van Deventer - Chemistry of materials, 2005 - ACS Publications
Geopolymers are a class of aluminosilicate materials synthesized by alkaline or alkali-
silicate activation of solid alumina-and silica-containing precursor materials at ambient or …

Role of carbonates in the chemical evolution of sodium carbonate-activated slag binders

SA Bernal, JL Provis, RJ Myers, R San Nicolas… - Materials and …, 2015 - Springer
Multi-technique characterisation of sodium carbonate-activated blast furnace slag binders
was conducted in order to determine the influence of the carbonate groups on the structural …

Crystalline phase formation in metakaolinite geopolymers activated with NaOH and sodium silicate

B Zhang, KJD MacKenzie, IWM Brown - Journal of materials science, 2009 - Springer
The effect of the NaOH content and the presence of sodium silicate activators on the
formation of crystalline phases from metakaolinite-based geopolymers were studied by X …

A and X-type zeolites synthesised from kaolinite at low temperature

C Belviso, F Cavalcante, A Lettino, S Fiore - Applied Clay Science, 2013 - Elsevier
A commercial Chinese well crystalline kaolinite (KCh) and a poorly crystalline kaolinite (KGa-
2) from the Source Clay Repository of The Clay Minerals Society were used, after fusion with …

Zeolites prepared from calcined and mechanically modified kaolins: a comparative study

AG San Cristóbal, R Castelló, MAM Luengo… - Applied Clay …, 2010 - Elsevier
Kaoliniferous sand and washed industrial kaolin obtained from it were calcined (750° C) or
milling prior to activation with NaOH. The changes were characterized by pH, cation …

Reactions of kaolinites and metakaolinites with NaOH—comparison of different samples (Part 1)

L Heller-Kallai, I Lapides - Applied Clay Science, 2007 - Elsevier
Reactions with aqueous sodium hydroxide of eight different kaolinites and of metakaolinites
derived from them were studied under hydrothermal conditions. All the kaolinites gave basic …

Kaolin deposits and occurrences in Africa: Geology, mineralogy and utilization

GIE Ekosse - Applied Clay Science, 2010 - Elsevier
Kaolin exploitation remains a financially sustained profit making mining industry that
continues to contribute positively to national economies of the world. Its occurrence in Africa …

Microwave-assisted versus conventional synthesis of zeolite A from metakaolinite

H Youssef, D Ibrahim, S Komarneni - Microporous and Mesoporous …, 2008 - Elsevier
This is a comparative study of the synthesis of zeolite A from metakaolinite using both
conventional and microwave-assisted heating. The effects of reaction conditions on the rate …

The effect of leaching temperature on kaolinite and meta-kaolin dissolution and zeolite re-precipitation

H Peng, T Qi, J Vogrin, Q Huang, W Wu, J Vaughan - Minerals Engineering, 2021 - Elsevier
The effect of temperature on leaching-precipitation kinetics of both meta-kaolin and kaolinite
was investigated. The dissolution of kaolin is the overall rate limiting step and only sodalite …

Novel synthesis and characterization of nanosized γ-Al2O3 from kaolin

H Yang, M Liu, J Ouyang - Applied Clay Science, 2010 - Elsevier
This paper reports the synthesis of nanosized γ-Al2O3 from acid-leachates of calcined
kaolin. Al (hydr) oxide was precipitated with ammonia from the leachate in the presence of …