A Porous Stone Technique to Measure the Initial Water Uptake by Supplementary Cementitious Materials

The decades-long use of supplementary cementitious materials (SCMs) as replacements for ordinary Portland cement (OPC) by the cement and concrete industry is undergoing a resurgence in research activities related to goals addressing circular economy activities, as well as reduction in CO<sub>2...

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Autores principales:	Andras Fehervari, Will P. Gates, Chathuranga Gallage, Frank Collins
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	initial water uptake water affinity supplementary cementitious material fresh properties workability Mineralogy QE351-399.2
Acceso en línea:	https://doaj.org/article/cdf1b484fc734aeb8d3dfa8f2507fbdb
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spelling	oai:doaj.org-article:cdf1b484fc734aeb8d3dfa8f2507fbdb2021-11-25T18:26:07ZA Porous Stone Technique to Measure the Initial Water Uptake by Supplementary Cementitious Materials10.3390/min111111852075-163Xhttps://doaj.org/article/cdf1b484fc734aeb8d3dfa8f2507fbdb2021-10-01T00:00:00Zhttps://www.mdpi.com/2075-163X/11/11/1185https://doaj.org/toc/2075-163XThe decades-long use of supplementary cementitious materials (SCMs) as replacements for ordinary Portland cement (OPC) by the cement and concrete industry is undergoing a resurgence in research activities related to goals addressing circular economy activities, as well as reduction in CO<sub>2</sub> emissions. Differences in the chemistry, mineralogy and reactivity of SCMs compared to OPC impact the fresh properties of concrete. Some SCMs exhibit greater initial water uptake and thus compete strongly with OPC for water during hydration. This study focuses on the early interaction with water as a primary factor that determines the resulting fresh properties and workability. Currently, no test (standard or otherwise) is available for quantifying initial interactions between water and cementitious materials. A quick and reliable method to measure the initial water uptake of SCMs is presented herein, which relies on their affinity to water. The method enables the calculation of water-to-binder ratios for different SCMs required to achieve the same workability as a reference OPC. The results are then well correlated to measured slump and bleed properties. We propose this simple technique to be used by researchers and industry practitioners to better predict the fresh properties of concretes, mortars, or pastes with SCMs.Andras FehervariWill P. GatesChathuranga GallageFrank CollinsMDPI AGarticleinitial water uptakewater affinitysupplementary cementitious materialfresh propertiesworkabilityMineralogyQE351-399.2ENMinerals, Vol 11, Iss 1185, p 1185 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	initial water uptake water affinity supplementary cementitious material fresh properties workability Mineralogy QE351-399.2
spellingShingle	initial water uptake water affinity supplementary cementitious material fresh properties workability Mineralogy QE351-399.2 Andras Fehervari Will P. Gates Chathuranga Gallage Frank Collins A Porous Stone Technique to Measure the Initial Water Uptake by Supplementary Cementitious Materials
description	The decades-long use of supplementary cementitious materials (SCMs) as replacements for ordinary Portland cement (OPC) by the cement and concrete industry is undergoing a resurgence in research activities related to goals addressing circular economy activities, as well as reduction in CO<sub>2</sub> emissions. Differences in the chemistry, mineralogy and reactivity of SCMs compared to OPC impact the fresh properties of concrete. Some SCMs exhibit greater initial water uptake and thus compete strongly with OPC for water during hydration. This study focuses on the early interaction with water as a primary factor that determines the resulting fresh properties and workability. Currently, no test (standard or otherwise) is available for quantifying initial interactions between water and cementitious materials. A quick and reliable method to measure the initial water uptake of SCMs is presented herein, which relies on their affinity to water. The method enables the calculation of water-to-binder ratios for different SCMs required to achieve the same workability as a reference OPC. The results are then well correlated to measured slump and bleed properties. We propose this simple technique to be used by researchers and industry practitioners to better predict the fresh properties of concretes, mortars, or pastes with SCMs.
format	article
author	Andras Fehervari Will P. Gates Chathuranga Gallage Frank Collins
author_facet	Andras Fehervari Will P. Gates Chathuranga Gallage Frank Collins
author_sort	Andras Fehervari
title	A Porous Stone Technique to Measure the Initial Water Uptake by Supplementary Cementitious Materials
title_short	A Porous Stone Technique to Measure the Initial Water Uptake by Supplementary Cementitious Materials
title_full	A Porous Stone Technique to Measure the Initial Water Uptake by Supplementary Cementitious Materials
title_fullStr	A Porous Stone Technique to Measure the Initial Water Uptake by Supplementary Cementitious Materials
title_full_unstemmed	A Porous Stone Technique to Measure the Initial Water Uptake by Supplementary Cementitious Materials
title_sort	porous stone technique to measure the initial water uptake by supplementary cementitious materials
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/cdf1b484fc734aeb8d3dfa8f2507fbdb
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A Porous Stone Technique to Measure the Initial Water Uptake by Supplementary Cementitious Materials

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