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Evaluation of brick clays from various deposits in central Germany for use as SCMs

  • The development of low carbon cements has gained great importance over the last decades. In the effort to limit the carbon content related to its production, cement is often replaced with supplementary cementitious materials (SCMs). Commonly used SCMs such as fly ash and slag have undergone extensive research, but are currently limited in supply and availability. Among the researched SCMs, calcined clays have proven to be a suitable alternative pozzolan due to their worldwide availability and extremely low calcination temperatures when compared to clinker. This poster presents the results from an ongoing project, aimed at obtaining pozzolans, available in sufficient quantities for Portland-pozzolana cement production in Germany. The poster shows the analyses of seven brick clays from various deposits in central Germany. The chemical and mineral composition of the brick clays was evaluated through inductively coupled plasma – optical emission spectroscopy (ICP-OES), X-ray diffractionThe development of low carbon cements has gained great importance over the last decades. In the effort to limit the carbon content related to its production, cement is often replaced with supplementary cementitious materials (SCMs). Commonly used SCMs such as fly ash and slag have undergone extensive research, but are currently limited in supply and availability. Among the researched SCMs, calcined clays have proven to be a suitable alternative pozzolan due to their worldwide availability and extremely low calcination temperatures when compared to clinker. This poster presents the results from an ongoing project, aimed at obtaining pozzolans, available in sufficient quantities for Portland-pozzolana cement production in Germany. The poster shows the analyses of seven brick clays from various deposits in central Germany. The chemical and mineral composition of the brick clays was evaluated through inductively coupled plasma – optical emission spectroscopy (ICP-OES), X-ray diffraction (XRD), and thermogravimetric analysis (TG/DTG). The particle size distribution (PSD) was also evaluated by laser granulometry. The results show that the brick clays contain a substantial amount of kaolinite, illite and smectite minerals, the relative proportions differing significantly between deposits. The suitable calcination temperature range of the clays is also evaluated through TG/DTG analysis to obtain the optimum degree of dehydroxylation from which the bricks clays can be suitable for use as a pozzolan.zeige mehrzeige weniger

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  • Msinjilli et. al_2017, Evaluation of brick clays from various deposits in Germany.pdf
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Metadaten
Autor*innen:Nsesheye Susan PriebeORCiD
Koautor*innen:Gregor Gluth, Sebastian Simon, H.-J. Schröder, Hans-Carsten Kühne
Dokumenttyp:Posterpräsentation
Veröffentlichungsform:Präsentation
Sprache:Englisch
Jahr der Erstveröffentlichung:2017
DDC-Klassifikation:Naturwissenschaften und Mathematik / Chemie / Analytische Chemie
Freie Schlagwörter:CO2 reduction; Calcined clay; Cement; Illite; Kaolinite; Smectite; Supplementary cementitious materials
Veranstaltung:2nd International Conference on Calcined Clays for Sustainable Concrete
Veranstaltungsort:Havana City, Cuba
Beginndatum der Veranstaltung:04.12.2017
Enddatum der Veranstaltung:07.12.2017
Bemerkung:
Geburtsname von Priebe, Nsesheye Susan: Msinjili, N. S. -  Birth name of Priebe, Nsesheye Susan: Msinjili, N. S.
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:12.01.2018
Referierte Publikation:Nein
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