2020
DOI: 10.1016/j.jobe.2020.101419
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Effects of metakaolin on the hydration development of Portland–composite cement

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Cited by 60 publications
(32 citation statements)
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“…On the other hand, the crystalline quartz phase, due to the aluminosilicate compounds, can improve the physical and mechanical properties of geopolymers [99]. The kaolinite in MK may demonstrate an incomplete calcination process, which is dependent on the temperature treatment [80,100,101]. The asymmetrical hump appearing clearly in the range of 20-30 • (2θ) is commonly identified in MKs and indicates an amorphous phase related to aluminosilicate glass (Figure S4 in the Supplementary Materials) [85,102].…”
Section: Resultsmentioning
confidence: 99%
“…On the other hand, the crystalline quartz phase, due to the aluminosilicate compounds, can improve the physical and mechanical properties of geopolymers [99]. The kaolinite in MK may demonstrate an incomplete calcination process, which is dependent on the temperature treatment [80,100,101]. The asymmetrical hump appearing clearly in the range of 20-30 • (2θ) is commonly identified in MKs and indicates an amorphous phase related to aluminosilicate glass (Figure S4 in the Supplementary Materials) [85,102].…”
Section: Resultsmentioning
confidence: 99%
“…Minerals 2021, 11, x 16 of 28 the clay goes through dehydration and dehydroxylation and undergoes structural re-organization in the octahedral sheet (aluminium takes on a 5-fold rather than 6-fold coordination) forming metakaolin [39,66]. It is well known that kaolinites release high fractions of hydroxyl groups (as H2O) upon heat-treatment [29,30,67,68]. The resulting coordination under-saturation of aluminium atoms in the calcined clay leads to a high affinity to water and ultimately a high initial water uptake of metakaolin upon rehydration.…”
Section: Initial Water Uptakementioning
confidence: 99%
“…Metakaolin consists of silica and alumina product that react with portlandite to produce C-S-H gel and alumina phases (C2ASH8, C4AH13 and C3AH6) [34]. Research results have shown that the use of metakaolin is quite useful in improving the strength of concrete at a young age [36,37],…”
Section: Introductionmentioning
confidence: 99%