Title:
Principles of Fourier Transform Infrared Spectroscopy and Applications to Alkali Activated Binders
Author(s):
Neithalath
Publication:
Web Session
Volume:
Issue:
Appears on pages(s):
Keywords:
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).