Principles of Fourier Transform Infrared Spectroscopy and Applications to Alkali Activated Binders

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Title: Principles of Fourier Transform Infrared Spectroscopy and Applications to Alkali Activated Binders

Author(s): Neithalath

Publication: Web Session

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Issue:

Appears on pages(s):

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DOI:

Date: 10/23/2022

Abstract:
This talk provides the results of a study implementing IR spectroscopy and associated spectral deconvolution to track the reaction progress in slags activated using Na or K silicate solutions. A Fourier self-deconvolution process, implemented in a custom-developed code is used for spectral deconvolution. The variations in the Si-O-T (T=Si or Al) antisymmetric stretching vibration occurring in the range of 940 cm-1 to 960 cm-1 is used to infer the influence of reaction time, temperature, and activator characteristics. The spectral deconvolution process highlights the growth of the Si-O-T band at the expense of Si-O symmetric bands, indicating the decrease in the amount of non-polymerized silica (Q0) to form more polymerized silica species (Q1 to Q2).




  

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