2026-05-31T19:27:36Zhttps://riuma.uma.es/rest/oai/requestoai:riuma.uma.es:10630/136332026-02-03T11:20:48Zcom_10630_2254col_10630_37953
RIUMA. Repositorio Institucional de la Universidad de Málaga
author
Cuesta-García, Ana María
author
Ichikawa, Rodrigo U.
author
Londono-Zuluaga, Diana
author
Gómez-de-la-Torre, María de los Ángeles
author
Santacruz-Cruz, María Isabel
author
Turrillas, Xavier
author
García-Aranda, Miguel Ángel
2017-05-12T10:24:13Z
2017-06
Cement and Concrete Research 96 (2017) 1–12
0008-8846
https://doi.org/10.1016/j.cemconres.2017.02.025
http://hdl.handle.net/10630/13633
There are many commercially important multiphase materials which contain amorphous phases, such as cement
pastes, porcelains, glass-ceramics or pharmaceutical compounds. However, the analysis of amorphous phase(s)
within cement matrices that contain high amounts of crystalline phase(s) is a challenge. Here, we report measurements
of total scattering data quantitatively analyzed by Pair Distribution Function (PDF) minimization
and Rietveld methodology to determine phase compositions including both amorphous and nanocrystalline
phase contents in cement-related samples. Furthermore, laboratory techniques were used to complement the
sample characterization. In addition to five reference materials, the main phase of calcium aluminate cements,
CaAl2O4 hydrated at 50 °C to yield crystalline hydrogarnet, Ca3Al2(OH)12, (43wt%) and nanocrystalline aluminum
hydroxide gel, Al(OH)3·0.1H2O (50wt%) was also investigated. The PDF analyses revealed that the hydroxide gel
has a gibbsite local structurewith an average particle size close to 5nm. PDF and Rietveld quantitative phase analysis
results fully agree.
eng
by-nc-nd
Cristalografía por rayos X
Cemento
Aluminum Hydroxide Gel Characterization within a Calcium Aluminate Cement Paste by Combined Pair Distribution Function and Rietveld Analyses
journal article
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