An investigation on alkali-activated slag pastes containing quartz powder subjected to elevated temperatures

Abstract In this work, the opportunity of employing crystalline silica in the form of quartz powder (QP) to increase the fire resistance of alkali-activated slag (AAS) has been explored. The ground granulated blast-furnace slag (designated as slag) was partially replaced with QP at levels changed fr...

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Autor principal:	Rashad,Alaa M.
Lenguaje:	English
Publicado:	Escuela de Construcción Civil, Pontificia Universidad Católica de Chile 2020
Materias:	Alkali-activated slag Quartz powder Elevated temperatures residual compressive strength
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-915X2020000100042
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spelling	oai:scielo:S0718-915X20200001000422020-05-26An investigation on alkali-activated slag pastes containing quartz powder subjected to elevated temperaturesRashad,Alaa M. Alkali-activated slag Quartz powder Elevated temperatures residual compressive strength Abstract In this work, the opportunity of employing crystalline silica in the form of quartz powder (QP) to increase the fire resistance of alkali-activated slag (AAS) has been explored. The ground granulated blast-furnace slag (designated as slag) was partially replaced with QP at levels changed from 5% to 30% with a step of 5%, by weight. After curing for 28 days, the specimens were subjected to elevated temperatures varying from 400 oC to 1000 oC with a step of 200 oC for 2 h. The compressive strength before and after heating was measured. The new formed phases were evaluated by using X-ray diffraction (XRD), whilst the decomposition phases were evaluated by using thermogravimetric (TGA). The changes in the microstructures were monitored by using scanning electron microscopy (SEM). The results showed a positive effect of incorporation of QP, up to 30%, in AAS system before and after exposure to elevated temperatures.info:eu-repo/semantics/openAccessEscuela de Construcción Civil, Pontificia Universidad Católica de ChileRevista de la construcción v.19 n.1 20202020-04-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-915X2020000100042en10.7764/rdlc.19.1.42-51
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Alkali-activated slag Quartz powder Elevated temperatures residual compressive strength
spellingShingle	Alkali-activated slag Quartz powder Elevated temperatures residual compressive strength Rashad,Alaa M. An investigation on alkali-activated slag pastes containing quartz powder subjected to elevated temperatures
description	Abstract In this work, the opportunity of employing crystalline silica in the form of quartz powder (QP) to increase the fire resistance of alkali-activated slag (AAS) has been explored. The ground granulated blast-furnace slag (designated as slag) was partially replaced with QP at levels changed from 5% to 30% with a step of 5%, by weight. After curing for 28 days, the specimens were subjected to elevated temperatures varying from 400 oC to 1000 oC with a step of 200 oC for 2 h. The compressive strength before and after heating was measured. The new formed phases were evaluated by using X-ray diffraction (XRD), whilst the decomposition phases were evaluated by using thermogravimetric (TGA). The changes in the microstructures were monitored by using scanning electron microscopy (SEM). The results showed a positive effect of incorporation of QP, up to 30%, in AAS system before and after exposure to elevated temperatures.
author	Rashad,Alaa M.
author_facet	Rashad,Alaa M.
author_sort	Rashad,Alaa M.
title	An investigation on alkali-activated slag pastes containing quartz powder subjected to elevated temperatures
title_short	An investigation on alkali-activated slag pastes containing quartz powder subjected to elevated temperatures
title_full	An investigation on alkali-activated slag pastes containing quartz powder subjected to elevated temperatures
title_fullStr	An investigation on alkali-activated slag pastes containing quartz powder subjected to elevated temperatures
title_full_unstemmed	An investigation on alkali-activated slag pastes containing quartz powder subjected to elevated temperatures
title_sort	investigation on alkali-activated slag pastes containing quartz powder subjected to elevated temperatures
publisher	Escuela de Construcción Civil, Pontificia Universidad Católica de Chile
publishDate	2020
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-915X2020000100042
work_keys_str_mv	AT rashadalaam aninvestigationonalkaliactivatedslagpastescontainingquartzpowdersubjectedtoelevatedtemperatures AT rashadalaam investigationonalkaliactivatedslagpastescontainingquartzpowdersubjectedtoelevatedtemperatures
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An investigation on alkali-activated slag pastes containing quartz powder subjected to elevated temperatures

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