The study of disorder and nanocrystallinity in C-S-H, supplementary cementitious materials and geopolymers using pair distribution function analysis

Date

2011-07-01

Author

Akgül, Çağla
Monteiro, Paulo JM

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Significant progress was achieved with the application of Rietveld method to characterize the crystalline phases in portland cement paste. However, to obtain detailed information on the amorphous or poorly crystalline phases, it is necessary to analyze the total scattering data. The pair distribution function (PDF) method has been successfully used in the study of liquids and amorphous solids. The method takes the Sine Fourier transform of the measured structure factor over a wide momentum transfer range, providing a direct measure of the probability of finding an atom surrounding a central atom at a radial distance away. The obtained experimental characteristic distances can be also used to validate the predictions by the theoretical models, such as, molecular dynamics, ab initio simulations and density functional theory. The paper summarizes recent results of PDF analysis on silica fume, rice husk ash, fly ash. ASR gel, C-S-H and geopolymers.

Subject Keywords

Amorphous material, Calcium-Silicate-Hydrate (C-S-H), X-ray diffraction, Alkali-aggregate reaction, Geopolymer

URI

https://hdl.handle.net/11511/38780

Journal

CEMENT AND CONCRETE RESEARCH

DOI

https://doi.org/10.1016/j.cemconres.2011.03.027

Collections

Department of Civil Engineering, Article

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Citation Formats

Ç. Akgül and P. J. Monteiro, “The study of disorder and nanocrystallinity in C-S-H, supplementary cementitious materials and geopolymers using pair distribution function analysis,” CEMENT AND CONCRETE RESEARCH, pp. 696–710, 2011, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/38780.