Quantitative XRD Analysis of Binary Blends of Siliceous Fly Ash and Hydrated Cement

Singh, G V P B and K V L, Subramaniam (2016) Quantitative XRD Analysis of Binary Blends of Siliceous Fly Ash and Hydrated Cement. Journal of Materials in Civil Engineering. pp. 1-7. ISSN 0899-1561

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Quantitative analysis of the amorphous phase in binary blends of siliceous fly ash and hydrated cement is presented using the Partial Or No Known Crystal Structure (PONKCS) method. In binary blends, the total amorphous phase contains contributions from the glassy phase in fly ash and amorphous components of hydrated cement. A single pseudo-Voigt function is found to adequately fit the broad hump in the X-ray diffraction pattern resulting from diffuse scattering produced by the glassy phase in siliceous fly ash. The weight fractions of the amorphous component of hydrated cement and the glassy phase of siliceous fly ash in a binary blend are determined using the fitted profiles for the X-ray diffraction (XRD) patterns. For low lime content of less than 5%, the peak characteristics of the fitted function for the broad hump in the XRD pattern of fly ash are nominally identical for different oxide compositions of the glassy phase. The PONKCS method is shown to provide good accuracy in determining siliceous fly ash content in binary blends.

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IITH Creators:
IITH CreatorsORCiD
K V L, Subramaniamhttp://orcid.org/0000-0002-5995-0911
Item Type: Article
Additional Information: The authors would like to acknowledge support of the Center of Excellence in Sustainable Development at I.I.T. Hyderabad.
Uncontrolled Keywords: X-ray diffraction, Amorphous, Phase analysis, Fly ash, Cement, Binary blend, Hydration
Subjects: Civil Engineering > Standards
Civil Engineering > Soil Structure Interaction
Divisions: Department of Civil Engineering
Depositing User: Team Library
Date Deposited: 19 Feb 2016 04:50
Last Modified: 05 Jul 2017 09:44
URI: http://raiith.iith.ac.in/id/eprint/2192
Publisher URL: http://doi.org/10.1061/(ASCE)MT.1943-5533.0001554
OA policy: http://www.sherpa.ac.uk/romeo/issn/0899-1561/
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