Ettringite dependace in thaumasite formation

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Title: Ettringite dependace in thaumasite formation
Authors: Chinchón Payá, Servando | Aguado de Cea, Antonio | Chinchón Yepes, Servando
Center, Department or Service: Universidad de Alicante. Departamento de Construcciones Arquitectónicas
Keywords: Thaumasite | Ettringite | Aluminum | Silicon
Knowledge Area: Construcciones Arquitectónicas
Issue Date: 2020
Publisher: IOP Publishing
Citation: IOP Conference Series: Materials Science and Engineering. 2020, 897: 012002.
Abstract: Thaumasite has been synthetized with and without ettringite in the reaction medium. The compositions of solids have been analyzed over time by means of X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM-EDX) in order to check the relation between ettringite and thaumasite. The results indicate that in the synthesis in absence of ettringite, the thaumasite appears at 6 months. By contrast, in the synthesis with presence of ettringite, at 7 days much of the ettringite has become thaumasite and at 2 months ettringite has disappeared and only thaumasite is detected. The results obtained at the end of two years experience, using the Rietveld method, show that thaumasite forms from ettringite by substitution of aluminum with silicon.
Sponsor: The authors wish to express their gratitude for the economic support received from the Ministerio de Economía y Competitividad [Spanish Ministry of Economy and Competitiveness] through the Research Project BIA 28798 C02 02 “La reacción sulfática interna en tre áridos con distintos compuestos de azufre y cementos de diferente contenido de aluminatos” [Internal sulfate reaction between aggregates with different sulfur compounds and cements with different aluminate contents].
ISSN: 1757-8981 (Print) | 1757-899X (Online)
DOI: 10.1088/1757-899X/897/1/012002
Language: eng
Type: info:eu-repo/semantics/article
Rights: Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Peer Review: si
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