C-S-H Quantification Using XRD: A Comparison of the Rietveld and PONKCS Methods
Source abstract
Abstract
The mineralogical quantification of cementitious materials can be performed using the Rietveld method, provided that suitable crystallographic data is available. X-ray amorphous phases, such as C-(A-)S-H, restrict the use of the Rietveld method because only very little crystallographic information is available. It is possible to get around this shortcoming using the PONKCS method (acronym for Partial Or No Known Crystal Structure) or employing the crystallographic data theorized by Richardson for C-S-H. This study examines the practical application of these two approaches to quantify the C-S-H phase of mature cement paste and the hydration monitoring of CEM I and C3S pastes. The quantifications obtained were compared to the TGA and hydration modeling results. It was shown that the two methods yield comparable and interchangeable results, each achieving an accuracy within 5% of the expected values.
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Research context
OpenAlex topics: Concrete and Cement Materials Research · X-ray Diffraction in Crystallography · CO2 Sequestration and Geologic Interactions
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Autorité de Sûreté Nucléaire et de Radioprotection (ASNR), F-92260, Fontenay-aux-Roses, France.
Université Paris-Saclay, CEA, Service de Recherche en Corrosion et Comportement des Matériaux, F-91191 Gif Sur Yvette, France.
Université Paris-Saclay, CEA, Service de Physico-Chimie, F-91191 Gif Sur Yvette, France.
Université Paris-Saclay CEA, CNRS, Nanosciences et Innovation pour les Materiaux la Biomedecine et l’Energie (NIMBE), F-91191 Gif sur Yvette, France.
Malvern Panalytical, 91120 Palaiseau, France.
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