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Crystallization of stratlingite in a high alumina cement-silica fume system with or without deflocculant

Shinmei, Toshio / Ohkawa, Makio / Borovsky, Adriana / Iiyama, Makoto / Parr, Chris

Hydration mechanism of low cement castables has been long investigated but only a limited number of studies focused on specific hydrates is available. This paper will investigate a formation of stratlingite (C2ASH8) which is believed to prevent a conversion of metastable hydrates to the stable C3AH6 in high alumina cement-silica fume systems. The stratlingite formations at 21°C and 35°C were confirmed by XRD. Its early formation at higher curing temperature is accelerated by the addition of sodium tripolyphosphate as evidenced by XRD.

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Crystallization of stratlingite in a high alumina cement-silica fume system with or without deflocculant

Shinmei, Toshio / Ohkawa, Makio / Borovsky, Adriana / Iiyama, Makoto / Parr, Chris

Hydration mechanism of low cement castables has been long investigated but only a limited number of studies focused on specific hydrates is available. This paper will investigate a formation of stratlingite (C2ASH8) which is believed to prevent a conversion of metastable hydrates to the stable C3AH6 in high alumina cement-silica fume systems. The stratlingite formations at 21°C and 35°C were confirmed by XRD. Its early formation at higher curing temperature is accelerated by the addition of sodium tripolyphosphate as evidenced by XRD.

Crystallization of stratlingite in a high alumina cement-silica fume system with or without deflocculant

Shinmei, Toshio / Ohkawa, Makio / Borovsky, Adriana / Iiyama, Makoto / Parr, Chris

Hydration mechanism of low cement castables has been long investigated but only a limited number of studies focused on specific hydrates is available. This paper will investigate a formation of stratlingite (C2ASH8) which is believed to prevent a conversion of metastable hydrates to the stable C3AH6 in high alumina cement-silica fume systems. The stratlingite formations at 21°C and 35°C were confirmed by XRD. Its early formation at higher curing temperature is accelerated by the addition of sodium tripolyphosphate as evidenced by XRD.

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Title:

Crystallization of stratlingite in a high alumina cement-silica fume system with or without deflocculant

Contributors:

Shinmei, Toshio (author) / Ohkawa, Makio (author) / Borovsky, Adriana (author) / Iiyama, Makoto (author) / Parr, Chris (author)

Published in:

Journal of the Technical Association of Refractories, Japan ; 32 ; 3-11

Publication date:

2012

Size:

9 Seiten, 10 Bilder, 2 Tabellen, 18 Quellen

ISSN:

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

zementarmer Feuerbeton , Calciumaluminatbinder , Calciumaluminathydrat , Calciumaluminatzement , Mikrosilica , Röntgenbeugung , Natriumphosphat , Entflockungsmittel , Fabutit , Aushärten , metastabile Phase , stabile Phase , pyrogene Kieselsäure

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