Development of supplementary cementitious materials from Algerian kaolin: elaboration of metakaolin and assessment of pozzolanicity

Mehsas, Boumediene; Siline, Mohammed; Zeghichi, Leila

doi:10.1007/s41062-020-00444-2

Cited by 14 publications

(6 citation statements)

References 37 publications

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“…Several previous studies have also reported a 2-hour calcination time as the optimum soaking time to convert kaolin to highly reactive metakaolin at a temperature above 600 °C [11,21]. This conclusion contradicts the study by Mehsas et al [22] that studied two metakaolin samples from Algeria and concluded that at any calcination temperature, a soaking time of 2 h was insufficient to convert the kaolin to the reactive phase. Table 1 summarizes the metakaolin processing condition from the previous studies.…”

Section: Introductionmentioning

confidence: 81%

Highly reactive metakaolin: a multi-parameter optimization by response surface methodology

Hamisi,

Jande,

Hilonga

2023

Eng. Res. Express

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Multi-parameter effect consideration during metakaolin conversion gives the best optimum processing conditions. Kaolin deposits have different properties, which makes it vital to establish optimum conditions for a distinctive kaolin deposit. The Response Surface Methodology under Box-Behnken Design has been adopted in the current study to optimize the processing conditions for kaolin-to-metakaolin conversion. The temperature of 765.608 °C, the rate of 9.775°C/min, and 6.465 h of soaking were the optimum conditions for yielding the highly reactive (1382.15mg Ca (OH)2/g) metakaolin. The typical reflections at 2θ of 14.32 and 29.03°attested to the existence of kaolinite in the kaolin sample, which then disappeared in the optimized metakaolin as confirmed by X-ray diffraction. The Fourier-transformation infrared spectroscopy confirmed the existence of kaolinite in the sample with reflections at the bands 3692, 3650, and 3620 cm-1 which disappeared to form a broad band in this region, which validates the formation of reactive amorphous metakaolin.

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Section: Introductionmentioning

confidence: 81%

Highly reactive metakaolin: a multi-parameter optimization by response surface methodology

Hamisi,

Jande,

Hilonga

2023

Eng. Res. Express

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“…Conversely, the SLT [19][20][21] utilizes a fixed amount of Ca(OH) 2 in the solution. It involves adding 1 g of pozzolan to a plastic bottle with 75 ml of saturated lime solution.…”

Section: Fratini Test and Saturated Lime Test (Slt)mentioning

confidence: 99%

Pozzolanic potential of sustainable precursors for engineered geopolymer composites (EGC)

Subramanian,

Davis,

Thomas

2024

Eng. Res. Express

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Confirming the pozzolanic activity is crucial to ensure their compatibility and performance in geopolymer composite (GC) applications, as it improves the geopolymerization process and optimizes the strength characteristics of GCs. This work evaluates the pozzolanic properties of Fly ash (FA), Basic Oxygen Furnace (BOF) slag, and Iron Ore Tailings (IOT) for their potential use in the development of Engineered Geopolymer Composites (EGC). IOT partially substitutes fine aggregate, while FA and BOF slag are the major precursors. Pozzolanic properties of the aforementioned materials were assessed through the Frattini, saturated lime test (SLT), and strength activity index (SAI). The Frattini test values recorded were 90, 47, and 30 % of CaO removal, denoting their degree of pozzolanicity respectively for BOF Slag, FA, and IOT. In the SLT, the formation of stable calcium silicate hydrates and aluminates are verified by the reaction of the test pozzolans with lime, thereby conforming their pozzolanicity. The results from the Frattini and SAI tests showed a significant correlation, indicating an effective pozzolanicity measure of the test materials. However, the results from the SLT did not align with the outcomes from the Frattini and SAI tests. This contradiction suggests that the SLT is ineffective compared to the other two test methods in measuring the pozzolanic activity of the test materials. The research findings provide valuable insights into the potential usage of these materials (pozzolans) as sustainable building materials in the construction industry.

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“…The high speci c surface area, speci c gravity and presence of CaO, SiO 2 and Fe 2 O 3 in GGBS increased the formation of C-S-H gel at all curing age and thereby increased the density and homogeneity of mix [33][34][35] . Aforementioned are the important reasons for attaining the higher strength of the mix blended with GGBS.…”

Section: Microstructure Analysismentioning

confidence: 99%

“…In addition, the heat rate and heat ow of various binders like synthesized cement [29] , calcium sulfoaluminate cement [30] , y ash, slag, silica fume, calcined clays, grounded lightweight aggregates, quartz, grounded limestone, municipal solid waste, grounded pumice, grounded glass, basalt nes [31] and Portland cement [32] were evaluated using the thermodynamic model for better understanding in pozzolanicity. Similarly, the XRD technique was used by many investigators for correlating the experimental and analytical results of pozzolanic activity of various cementitious materials [33][34][35] . XRD techniques predict the development of calcium hydroxide, Calcium-silicate hydrate, tricalcium silicate, dicalcium silicate and ettringite at different curing ages in various binders [36][37] .…”

Section: Introductionmentioning

confidence: 99%

Effect of Silica in Cementitious Composites Using Thermodynamic Modeling

Shanmugasundaram

Praveenkumar

2022

Preprint

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This article examines the effect of silica on pozzolanic performance of Portland cement blended with Ground Granulated Blast furnace Slag (GGBS), and Bagasse Ash (BA). Using the thermodynamic modeling and X-Ray powder Diffraction technique (XRD), the effect of different water to binder ratios in cementitious composites is analyzed through the hydration process of the proposed mixes. The hydration of the composites involves the formation of Portlandite, Calcium-Silicate Hydrate (C-S-H), tricalcium silicate (C3S), dicalcium silicate (C2S), tricalcium aluminate (C3A), tetracalcium aluminoferrite (C4AF) and ettringite at 28 days. The results of thermodynamic modeling are compared with XRD technique, compressive strength and strength activity index test. Portland cement blended with GGBS attained better pozzolanic activity with 0.3 and 0.35 water to binder ratios than admixed BA. Also, the hydration products predicted from thermodynamic modeling and XRD peaks are highly resound in compressive strength and strength activity index tests.

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Development of supplementary cementitious materials from Algerian kaolin: elaboration of metakaolin and assessment of pozzolanicity

Cited by 14 publications

References 37 publications

Highly reactive metakaolin: a multi-parameter optimization by response surface methodology

Highly reactive metakaolin: a multi-parameter optimization by response surface methodology

Pozzolanic potential of sustainable precursors for engineered geopolymer composites (EGC)

Effect of Silica in Cementitious Composites Using Thermodynamic Modeling

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