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27Al-1H and 27Al-29Si Double resonance NMR of one-part geopolymers

  • The production and processing of ordinary Portland cement are responsible for nearly 5% of the world C02 emissions. Due to the world’s increasing requirement for building materials, this air pollution is growing up in the next decades. Alternative cement such as geopolymers can reduce these emissions effectively, Conventional geopolymer binders, produced ffom fly ash or metakaolin as aluminosilicate source and water-glass or alkali hydroxide Solutions as activator, are often used and studied. It is known that under appropriate conditions the starting materials form a three-dimensional aluminosilicate structure and create a gel-like matrix, In our case, a silica source from wastewater treatment of chlorosilane production and solid sodium aluminate as starting materials are initiated to harden by water. This procedure is known as “just add water” or “one-part” geopolymer formulation. These composites have significant advantages for use on construction site, but their Chemical structureThe production and processing of ordinary Portland cement are responsible for nearly 5% of the world C02 emissions. Due to the world’s increasing requirement for building materials, this air pollution is growing up in the next decades. Alternative cement such as geopolymers can reduce these emissions effectively, Conventional geopolymer binders, produced ffom fly ash or metakaolin as aluminosilicate source and water-glass or alkali hydroxide Solutions as activator, are often used and studied. It is known that under appropriate conditions the starting materials form a three-dimensional aluminosilicate structure and create a gel-like matrix, In our case, a silica source from wastewater treatment of chlorosilane production and solid sodium aluminate as starting materials are initiated to harden by water. This procedure is known as “just add water” or “one-part” geopolymer formulation. These composites have significant advantages for use on construction site, but their Chemical structure is not extensively analyzed. In this work, a well known one-part geopolymer is investigated by 'H and 27A1 magic-angle spinning nuclear magnetic resonance (MAS NMR) spectroscopy. Furthermore, it is shown that overlapping NMR lines can resolved with echo experiments andzeige mehrzeige weniger

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Metadaten
Autor*innen:Sebastian Greiser, Gregor GluthORCiD, Patrick SturmORCiD, H.J.H. Brouwers, Christian Jäger
Persönliche Herausgeber*innen:V. Bílek, Z. Kersner
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):NTCC2014 - International conference on non-traditional cement & concrete V (Proceedings)
Jahr der Erstveröffentlichung:2014
Herausgeber (Institution):Brno University of Technology
Verlag:Novpress
Erste Seite:91
Letzte Seite:94
Freie Schlagwörter:Geopolymers; NMR; One-part formulation; REDOR; Zeolite Na-A
Veranstaltung:NTCC2014 - International conference on non-traditional cement and concrete
Veranstaltungsort:Brno, Czech Republic
Beginndatum der Veranstaltung:16.06.2014
Enddatum der Veranstaltung:19.06.2014
ISBN:978-80-214-4867-4
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:20.02.2016
Referierte Publikation:Nein
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