2022
DOI: 10.1617/s11527-022-01973-1
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Paper of RILEM TC 282-CCL: mineralogical characterization methods for clay resources intended for use as supplementary cementitious material

Abstract: To respond to the rapid introduction and development of calcined clays as supplementary cementitious material (SCM), the toolbox of characterization methods for cementitious materials requires extension to raw clay characterization. Borrowing concepts and methods developed in the field of clay mineralogy, this paper outlines the merits and limits of widely accessible characterization techniques for raw clays intended for use as SCM, when calcined. The paper focuses mainly on the identification and quantificati… Show more

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Cited by 14 publications
(4 citation statements)
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“…Therefore, the dehydroxylation peak here could be brought about by either kaolinite alone or collectively by 1:1 and 2:1 minerals present in the clays. Some other phases like calcite as shown in the FTIR for SC, could also start to decompose at this temperature range [43]. SC has another dehydroxylating peak at 760 • C that could be attributable to montmorillonite or illite.…”
Section: Mineralogy Of Raw Claysmentioning
confidence: 87%
See 1 more Smart Citation
“…Therefore, the dehydroxylation peak here could be brought about by either kaolinite alone or collectively by 1:1 and 2:1 minerals present in the clays. Some other phases like calcite as shown in the FTIR for SC, could also start to decompose at this temperature range [43]. SC has another dehydroxylating peak at 760 • C that could be attributable to montmorillonite or illite.…”
Section: Mineralogy Of Raw Claysmentioning
confidence: 87%
“…From the TGA curves in Fig. 3, the mass losses at a temperature range of 300-800 • C relate to dehydroxylations of clay phyllosilicates [43]. It is known that the mass losses of these minerals commonly overlap in specific temperature intervals [37].…”
Section: Mineralogy Of Raw Claysmentioning
confidence: 99%
“…The most influencing characteristic of the reactivity potential of clays is the mineral phase composition of the raw material. Concerning an appropriate mineralogical phase characterization, it is referred to [60]. Firstly, the material must contain sufficient content of activatable phases.…”
Section: Methods To Investigate the Reactivity Of Calcined Claysmentioning
confidence: 99%
“…1b) are exceptionally broad. The amount of clay mineral in each standard was calculated based on its dehydroxylation reaction, as proposed in [48], and is 88 % and 90 % for SWy-3 and SAu-1, respectively. Finally, a small S-shaped endothermic/exothermic set of reactions, without associated mass loss, due to the structural decomposition of montmorillonite and crystallisation of spinel [45,49], at ~910 and ~870ºC, is observed in Fig.…”
Section: Characterisation Of the As-received Smectite Claysmentioning
confidence: 99%