Thermodynamic parameters (densities, viscosities, speed of sound, and refractive index) of four series of alkaline activators were determined over the temperature range from 15 to 60 °C for the process of geopolymerization. Mixtures of Na2SiO3and NaOH of different molar concentrations (from 2M to 8M with step 2) were used as an alkaline activator. The sample with the highest NaOH concentrationalso shows the highest values of all thermodynamic parameters.Metakaolin, obtained by calcination of kaolin at 750 °C, was used as the starting material.The samples were characterized by X-ray diffraction (XRD),FTIR and Raman spectroscopy, Scanning Electron Microscopy (SEM), and Energy-Dispersive X-Ray (EDX) Spectroscopy. Results of FTIR analysis correlated with results of Raman Spectroscopy. Due to the polymerization process, the changes in the phonon spectrum were confirmed. The different concentra-tions of activators do not notably change the Si/Al ratio.
Keywords:
geopolymers / density / viscosity / speed of sound / refractive index / FTIR / Raman spectroscopy
Source:
Macedonian Journal of Chemistry and Chemical Engineering, 2021, 40, 1, 99-
Publisher:
Society of Chemists and Technologists of Macedonia
Funding / projects:
Ministry of Education, Science and Technological Development of the Republic of Serbia
TY - JOUR
AU - Ivanović, Marija
AU - Nenadović, Snežana
AU - Pavlović, Vera P.
AU - Radović, Ivona
AU - Kijevčanin, Mirjana
AU - Pavlović, Vladimir B.
AU - Kljajević, Ljiljana
PY - 2021
UR - https://dais.sanu.ac.rs/123456789/11800
AB - Thermodynamic parameters (densities, viscosities, speed of sound, and refractive index) of four series of alkaline activators were determined over the temperature range from 15 to 60 °C for the process of geopolymerization. Mixtures of Na2SiO3and NaOH of different molar concentrations (from 2M to 8M with step 2) were used as an alkaline activator. The sample with the highest NaOH concentrationalso shows the highest values of all thermodynamic parameters.Metakaolin, obtained by calcination of kaolin at 750 °C, was used as the starting material.The samples were characterized by X-ray diffraction (XRD),FTIR and Raman spectroscopy, Scanning Electron Microscopy (SEM), and Energy-Dispersive X-Ray (EDX) Spectroscopy. Results of FTIR analysis correlated with results of Raman Spectroscopy. Due to the polymerization process, the changes in the phonon spectrum were confirmed. The different concentra-tions of activators do not notably change the Si/Al ratio.
PB - Society of Chemists and Technologists of Macedonia
T2 - Macedonian Journal of Chemistry and Chemical Engineering
T1 - The influence of thermodynamic parameters on alkaline activator of geopolymers and structure of geopolymers
SP - 99
VL - 40
IS - 1
DO - 10.20450/mjcce.2021.2127
UR - https://hdl.handle.net/21.15107/rcub_dais_11800
ER -
@article{
author = "Ivanović, Marija and Nenadović, Snežana and Pavlović, Vera P. and Radović, Ivona and Kijevčanin, Mirjana and Pavlović, Vladimir B. and Kljajević, Ljiljana",
year = "2021",
abstract = "Thermodynamic parameters (densities, viscosities, speed of sound, and refractive index) of four series of alkaline activators were determined over the temperature range from 15 to 60 °C for the process of geopolymerization. Mixtures of Na2SiO3and NaOH of different molar concentrations (from 2M to 8M with step 2) were used as an alkaline activator. The sample with the highest NaOH concentrationalso shows the highest values of all thermodynamic parameters.Metakaolin, obtained by calcination of kaolin at 750 °C, was used as the starting material.The samples were characterized by X-ray diffraction (XRD),FTIR and Raman spectroscopy, Scanning Electron Microscopy (SEM), and Energy-Dispersive X-Ray (EDX) Spectroscopy. Results of FTIR analysis correlated with results of Raman Spectroscopy. Due to the polymerization process, the changes in the phonon spectrum were confirmed. The different concentra-tions of activators do not notably change the Si/Al ratio.",
publisher = "Society of Chemists and Technologists of Macedonia",
journal = "Macedonian Journal of Chemistry and Chemical Engineering",
title = "The influence of thermodynamic parameters on alkaline activator of geopolymers and structure of geopolymers",
pages = "99",
volume = "40",
number = "1",
doi = "10.20450/mjcce.2021.2127",
url = "https://hdl.handle.net/21.15107/rcub_dais_11800"
}
Ivanović, M., Nenadović, S., Pavlović, V. P., Radović, I., Kijevčanin, M., Pavlović, V. B.,& Kljajević, L.. (2021). The influence of thermodynamic parameters on alkaline activator of geopolymers and structure of geopolymers. in Macedonian Journal of Chemistry and Chemical Engineering
Society of Chemists and Technologists of Macedonia., 40(1), 99.
https://doi.org/10.20450/mjcce.2021.2127
https://hdl.handle.net/21.15107/rcub_dais_11800
Ivanović M, Nenadović S, Pavlović VP, Radović I, Kijevčanin M, Pavlović VB, Kljajević L. The influence of thermodynamic parameters on alkaline activator of geopolymers and structure of geopolymers. in Macedonian Journal of Chemistry and Chemical Engineering. 2021;40(1):99.
doi:10.20450/mjcce.2021.2127
https://hdl.handle.net/21.15107/rcub_dais_11800 .
Ivanović, Marija, Nenadović, Snežana, Pavlović, Vera P., Radović, Ivona, Kijevčanin, Mirjana, Pavlović, Vladimir B., Kljajević, Ljiljana, "The influence of thermodynamic parameters on alkaline activator of geopolymers and structure of geopolymers" in Macedonian Journal of Chemistry and Chemical Engineering, 40, no. 1 (2021):99,
https://doi.org/10.20450/mjcce.2021.2127 .,
https://hdl.handle.net/21.15107/rcub_dais_11800 .
