Characterization of the properties of perlite geopolymer pastes
This paper deals with the characterization of perlite-based geopolymer pastes, using fine perlite as raw material. The present study examined the effects of the main synthesis parameters such as perlite to activator ratio, NaOH concentration, the addition of soluble silica to the activator, and curi...
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Consejo Superior de Investigaciones Científicas
2016-12-01
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doaj-c1099fe4aa1a4c9c9ac7ad03f26497ab2021-05-05T07:36:26ZengConsejo Superior de Investigaciones CientíficasMateriales de Construccion0465-27461988-32262016-12-0166324e102e10210.3989/mc.2016.104151979Characterization of the properties of perlite geopolymer pastesG. M. Tsaousi0I. Douni1D. Panias2National Technical University of Athens (NTUA)National Technical University of Athens (NTUA)National Technical University of Athens (NTUA)This paper deals with the characterization of perlite-based geopolymer pastes, using fine perlite as raw material. The present study examined the effects of the main synthesis parameters such as perlite to activator ratio, NaOH concentration, the addition of soluble silica to the activator, and curing temperatureon the setting time, the stability in an aquatic environment, the viscosity of the paste, and the compressive strength of the solidified geopolymers. The results showed that these inorganic polymer pastes are non-Newtonian shear thinning fluids that achieve low viscosities at high shear stresses. The optimum synthesis conditions for the geopolymer pastes proved to be a) a low initial NaOH concentration in the alkaline phase (2–5 M) and b) a solid to liquid ratio of 1.2–1.4 g/mL. If very fast setting is necessary, the pastes should be prepared with a soluble silica-doped alkaline activating phase and cured at high temperatures around 90 °C.http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/2042perlitegeopolymer pastealkali activationcharacterization |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
G. M. Tsaousi I. Douni D. Panias |
spellingShingle |
G. M. Tsaousi I. Douni D. Panias Characterization of the properties of perlite geopolymer pastes Materiales de Construccion perlite geopolymer paste alkali activation characterization |
author_facet |
G. M. Tsaousi I. Douni D. Panias |
author_sort |
G. M. Tsaousi |
title |
Characterization of the properties of perlite geopolymer pastes |
title_short |
Characterization of the properties of perlite geopolymer pastes |
title_full |
Characterization of the properties of perlite geopolymer pastes |
title_fullStr |
Characterization of the properties of perlite geopolymer pastes |
title_full_unstemmed |
Characterization of the properties of perlite geopolymer pastes |
title_sort |
characterization of the properties of perlite geopolymer pastes |
publisher |
Consejo Superior de Investigaciones Científicas |
series |
Materiales de Construccion |
issn |
0465-2746 1988-3226 |
publishDate |
2016-12-01 |
description |
This paper deals with the characterization of perlite-based geopolymer pastes, using fine perlite as raw material. The present study examined the effects of the main synthesis parameters such as perlite to activator ratio, NaOH concentration, the addition of soluble silica to the activator, and curing temperatureon the setting time, the stability in an aquatic environment, the viscosity of the paste, and the compressive strength of the solidified geopolymers. The results showed that these inorganic polymer pastes are non-Newtonian shear thinning fluids that achieve low viscosities at high shear stresses. The optimum synthesis conditions for the geopolymer pastes proved to be a) a low initial NaOH concentration in the alkaline phase (2–5 M) and b) a solid to liquid ratio of 1.2–1.4 g/mL. If very fast setting is necessary, the pastes should be prepared with a soluble silica-doped alkaline activating phase and cured at high temperatures around 90 °C. |
topic |
perlite geopolymer paste alkali activation characterization |
url |
http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/2042 |
work_keys_str_mv |
AT gmtsaousi characterizationofthepropertiesofperlitegeopolymerpastes AT idouni characterizationofthepropertiesofperlitegeopolymerpastes AT dpanias characterizationofthepropertiesofperlitegeopolymerpastes |
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1721468658163646464 |