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

Tchakouté, Hervé K.; Rüscher, Claus H.; Hinsch, Malte Sebastian; Djobo, Jean Noël Yankwa; Kamseu, Elie; Leonelli, Cristina

doi:10.1016/j.chemer.2017.04.003

Cited by 96 publications

(29 citation statements)

References 24 publications

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“…Researchers have been exploring new SCBA utilizations. These new SCBA uses include production of glass-ceramic material [12], geopolymers [13], raw material for ceramic [14], phillipsite zeolite synthesis [15], Fe 2 O 3 -SiO 2 nanocomposite to remove Cr(VI) [16], sodium waterglass [17], silica aerogels [18], and mesoporous silica as a catalyst [19]. It should be emphasized that considerable SCBA research has been focused on utilization in cementitious materials.…”

Section: Introductionmentioning

confidence: 99%

Characteristics and Applications of Sugar Cane Bagasse Ash Waste in Cementitious Materials

Gao

et al. 2018

Materials

171

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Sugar cane bagasse ash (SCBA) is an abundant byproduct of the sugar and ethanol industry. SCBA is generally used as a fertilizer or is disposed of in landfills, which has led to intensified environmental concerns. In recent years, SCBA research has mainly been focused on utilization in construction materials due to the abundance and pozzolanic characteristics of SCBA. In this paper, a comprehensive review of the state-of-the-art morphology, physical properties, chemical composition, and mineralogical composition of SCBA is presented. Studies indicate that SCBA is a potentially promising construction material. The applications of SCBA as a pozzolanic material, a new source for preparing alkali-activated binders, aggregates, and fillers in construction materials, are summarized. The impacts of SCBA on fresh and hardened concrete properties are highlighted, including the physical properties, mechanical strength, microstructure, and durability. Key factors that govern pozzolanic activity are discussed in detail, including calcination and recalcination temperatures, and durations, fineness, loss on ignition (LOI), and crystal silicon dioxide. Finally, further research on the optimal and broad utilization of SCBA in construction materials is recommended.

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Section: Introductionmentioning

confidence: 99%

Characteristics and Applications of Sugar Cane Bagasse Ash Waste in Cementitious Materials

Gao

et al. 2018

Materials

171

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“…The pastes produced by the activating solution with glass waste from a BFS-based system possessed $75-80% of the compressive strength of the control, which is similar to the SCSA results presented here. More recently, sugar cane bagasse ash was evaluated as a silica source in the production of the activating solution [25]. This new solution yielded similar results in compressive strength tests to those from waste glass and RHA in metakaolin-based AAM.…”

Section: Comparison Of Scsa To Other Silica Sourcesmentioning

confidence: 96%

“…One of the key research targets in the near future will thus be the assessment of new sources of silica to produce the activating solution due the sodium silicate disadvantages [18,19]. One of the key research targets in the near future will thus be the assessment of new sources of silica to produce the activating solution [20][21][22][23][24][25]. Results from these studies about new silica source to the alkaline activator will be discussed in the Results and Discussions section, where they will be compared to the use of SCSA to the same purpose.…”

Section: Introductionmentioning

confidence: 99%

Exploratory study on the utilization of different dietary methionine sources and methionine to lysine ratio for growing–finishing pigs

et al. 2015

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“…Rice husk ash appeared to be suitable for producing an alkalineactivator solution in combination with NaOH (He et al 2013;Tchakouté et al 2016). Furthermore, waste glass and sugar cane bagasse ash performed well in terms of geopolymer production (Tchakouté et al 2016(Tchakouté et al , 2017. The solubility of any other alternative SiO 2 sources in NaOH was not considered here.…”

Section: Introductionmentioning

confidence: 99%

Solubility of Precursors and Carbonation of Waterglass-Free Geopolymers

Werling

Dehn

Krause

et al. 2020

Clays and clay miner.

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Geopolymers have the potential to function as an environmentally friendly substitute for ordinary Portland cement, with up to 80% less CO2 emission during production. The effect is best utilized for geopolymers prepared with amorphous silica instead of waterglass (Na2xSiyO2y+x) to adjust the Si:Al ratio. The reactivity of the precursors with the alkaline activator affects the final mineralogical properties of the binder. The purpose of the present study was to investigate the amount of different phases formed during geopolymerization and to understand the quantitative evolution of carbonation during geopolymer synthesis by determining the solubility of metakaolinite and amorphous SiO2 in NaOH at various concentrations. The solubility was studied by ICP-OES measurements. X-ray diffraction was used for qualitative and quantitative phase analysis of the geopolymers. The solubility of the precursors increased with calcination temperature of metakaolinite, reaction time for amorphous SiO2, and at higher NaOH concentrations. Partial dissolution resulted in free Na+, which is a source for the formation of carbonates in the geopolymers. Thermonatrite occurred prior to trona formation in all samples.

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

Cited by 96 publications

References 24 publications

Characteristics and Applications of Sugar Cane Bagasse Ash Waste in Cementitious Materials

Characteristics and Applications of Sugar Cane Bagasse Ash Waste in Cementitious Materials

Exploratory study on the utilization of different dietary methionine sources and methionine to lysine ratio for growing–finishing pigs

Solubility of Precursors and Carbonation of Waterglass-Free Geopolymers

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