Influence of gibbsite and quartz in kaolin on the properties of metakaolin-based geopolymer cements

Tchakouté, Hervé K.; Rüscher, Claus H.; Djobo, Jean Noël Yankwa; Kenne, B.B.D.; Njopwouo, D.

doi:10.1016/j.clay.2015.01.023

Cited by 142 publications

(64 citation statements)

References 30 publications

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“…The peaks observed at 800, 685, 546 and 466 cm −1 are attributed to the presence of quartz along with the characteristic peaks of dehydrated kaolinite, too. Quartz bands appear at 515, 696, 780 and 797 cm −1 , which are not seen here as significant as in another case, where it could be subtracted (Tchakoute et al, 2015). This could indicate a higher amorphous silica content and lower quartz content in the MK studied here.…”

Section: Characterization Of Raw Materials and Sodium Waterglass Fromcontrasting

confidence: 57%

Utilization of sodium waterglass from sugar cane bagasse ash as a new alternative hardener for producing metakaolin-based geopolymer cement

et al. 2017

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Section: Characterization Of Raw Materials and Sodium Waterglass Fromcontrasting

confidence: 57%

Utilization of sodium waterglass from sugar cane bagasse ash as a new alternative hardener for producing metakaolin-based geopolymer cement

et al. 2017

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“…5) which it could still be related to Al-O vibrations of Al in six fold coordination, probably due to the presence of muscovite [24], as a consequence of the high content of clayey minerals. While the loss on ignition in Z K is -0.2 wt% and implies that Z K does not contain clayey mineral and therefore not contain hydroxyl groups in their structure.…”

Section: Role Of Structural Water or Mineralogical Composition On Thementioning

confidence: 96%

A comparative study of two methods to produce geopolymer composites from volcanic scoria and the role of structural water contained in the volcanic scoria on its reactivity

Tchakouté

Kong

Djobo

et al. 2015

Ceramics International

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“…Several aluminosilicate sources are being studied to produce alkali-activated binders such as fly ash from thermoelectric power plants [10,13], metakaolin [14], spent fluid catalytic cracking catalysts [9], blastfurnace slag [15] and others. In addition, residues from the agroindustry are being researched in alkaliactivated binders, such as rice husk ash [16].…”

Section: Introductionmentioning

confidence: 99%

Study of the binary system fly ash/sugarcane bagasse ash (FA/SCBA) in SiO2/K2O alkali-activated binders

Castaldelli

Moraes

Akasaki

et al. 2016

Fuel

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Due environmental problems related to Portland cement consumption, many studies have been performed to diminish its use. One solution is the development of alkali-activated binders, which can decrease CO 2 emissions and energy consumption by 70% when compared to Portland cement production. In addition, an alkali-activated binder presents mechanical properties similar to Portland cement mixtures, which turns into an interesting material in civil construction. Aluminosilicate-based materials are important raw materials to produce the alkali-activated binders. Therefore, two residues are presented as an aluminosilicate source in this study: fly ash (FA) and sugarcane bagasse ash (SCBA). Both residues were obtained from a combustion process to generate energy, the former from coal and the latter from the bagasse of the sugarcane industry. In addition, the alkaline activating solution is an important factor to achieve improved mechanical properties. In this context, this study investigated the influence of four different SiO 2 /K 2 O molar ratios (0, 0.36, 0.75 and 1.22) in the activating solution with a constant water content, and three FA/SCBA binder proportions (75/25, 50/50 and 25/75). Microstructural characterization was carried out by X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy, mercury intrusion porosimetry, pH and electrical conductivity measurements to study the evolution of the reaction process. The compressive strength of mortars was assessed in order to determine the optimum SiO 2 /K 2 O molar ratio and FA/SCBA ratio. The tests showed that a SiO 2 /K 2 O molar ratio of 0.75 and FA/SCBA proportion of 75/25 provided the best mechanical properties.

show abstract

Influence of gibbsite and quartz in kaolin on the properties of metakaolin-based geopolymer cements

Cited by 142 publications

References 30 publications

Utilization of sodium waterglass from sugar cane bagasse ash as a new alternative hardener for producing metakaolin-based geopolymer cement

Utilization of sodium waterglass from sugar cane bagasse ash as a new alternative hardener for producing metakaolin-based geopolymer cement

A comparative study of two methods to produce geopolymer composites from volcanic scoria and the role of structural water contained in the volcanic scoria on its reactivity

Study of the binary system fly ash/sugarcane bagasse ash (FA/SCBA) in SiO2/K2O alkali-activated binders

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