Cargando…
Influence of Activator Na(2)O Concentration on Residual Strengths of Alkali-Activated Slag Mortar upon Exposure to Elevated Temperatures
The mechanical strength variation of ambient cured Alkali-activated mortar (AAS) upon exposure to elevated temperatures from 200 to 1200 °C was studied in this article. Slag was activated by the combination of sodium silicate liquid (Na(2)SiO(3)) and sodium hydroxide (NaOH) with different Na(2)O con...
Autores principales: | , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2018
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6117732/ https://www.ncbi.nlm.nih.gov/pubmed/30060462 http://dx.doi.org/10.3390/ma11081296 |
_version_ | 1783351812136370176 |
---|---|
author | Tran, Tai Thanh Kwon, Hyug-Moon |
author_facet | Tran, Tai Thanh Kwon, Hyug-Moon |
author_sort | Tran, Tai Thanh |
collection | PubMed |
description | The mechanical strength variation of ambient cured Alkali-activated mortar (AAS) upon exposure to elevated temperatures from 200 to 1200 °C was studied in this article. Slag was activated by the combination of sodium silicate liquid (Na(2)SiO(3)) and sodium hydroxide (NaOH) with different Na(2)O concentrations of 4%, 6%, 8%, and 10% by slag weight. Mechanical properties comprising compressive strength, flexural strength, and tensile strength before and after exposure were measured. Thermogravimetric analysis (Thermogravimetric analysis (TGA) and Derivative thermogravimetric (DTG)), X-ray diffraction (XRD), scanning electron microscope (SEM), and energy-dispersive X-ray spectroscopy (EDS) were also used for strength alteration explanation. The results indicated that Na(2)O concentration influence on strength variation of AAS mortar was observed clearly at temperature range from ambient temperature to 200 °C. The melting alteration of AAS mortar after exposed to 1200 °C was highly dependent on concentrations of Na(2)O. |
format | Online Article Text |
id | pubmed-6117732 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-61177322018-09-05 Influence of Activator Na(2)O Concentration on Residual Strengths of Alkali-Activated Slag Mortar upon Exposure to Elevated Temperatures Tran, Tai Thanh Kwon, Hyug-Moon Materials (Basel) Article The mechanical strength variation of ambient cured Alkali-activated mortar (AAS) upon exposure to elevated temperatures from 200 to 1200 °C was studied in this article. Slag was activated by the combination of sodium silicate liquid (Na(2)SiO(3)) and sodium hydroxide (NaOH) with different Na(2)O concentrations of 4%, 6%, 8%, and 10% by slag weight. Mechanical properties comprising compressive strength, flexural strength, and tensile strength before and after exposure were measured. Thermogravimetric analysis (Thermogravimetric analysis (TGA) and Derivative thermogravimetric (DTG)), X-ray diffraction (XRD), scanning electron microscope (SEM), and energy-dispersive X-ray spectroscopy (EDS) were also used for strength alteration explanation. The results indicated that Na(2)O concentration influence on strength variation of AAS mortar was observed clearly at temperature range from ambient temperature to 200 °C. The melting alteration of AAS mortar after exposed to 1200 °C was highly dependent on concentrations of Na(2)O. MDPI 2018-07-27 /pmc/articles/PMC6117732/ /pubmed/30060462 http://dx.doi.org/10.3390/ma11081296 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Tran, Tai Thanh Kwon, Hyug-Moon Influence of Activator Na(2)O Concentration on Residual Strengths of Alkali-Activated Slag Mortar upon Exposure to Elevated Temperatures |
title | Influence of Activator Na(2)O Concentration on Residual Strengths of Alkali-Activated Slag Mortar upon Exposure to Elevated Temperatures |
title_full | Influence of Activator Na(2)O Concentration on Residual Strengths of Alkali-Activated Slag Mortar upon Exposure to Elevated Temperatures |
title_fullStr | Influence of Activator Na(2)O Concentration on Residual Strengths of Alkali-Activated Slag Mortar upon Exposure to Elevated Temperatures |
title_full_unstemmed | Influence of Activator Na(2)O Concentration on Residual Strengths of Alkali-Activated Slag Mortar upon Exposure to Elevated Temperatures |
title_short | Influence of Activator Na(2)O Concentration on Residual Strengths of Alkali-Activated Slag Mortar upon Exposure to Elevated Temperatures |
title_sort | influence of activator na(2)o concentration on residual strengths of alkali-activated slag mortar upon exposure to elevated temperatures |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6117732/ https://www.ncbi.nlm.nih.gov/pubmed/30060462 http://dx.doi.org/10.3390/ma11081296 |
work_keys_str_mv | AT trantaithanh influenceofactivatorna2oconcentrationonresidualstrengthsofalkaliactivatedslagmortaruponexposuretoelevatedtemperatures AT kwonhyugmoon influenceofactivatorna2oconcentrationonresidualstrengthsofalkaliactivatedslagmortaruponexposuretoelevatedtemperatures |