Evaluating the eco-compatibility of mortars with feldspar-based fine aggregate

As cement manufacturing is associated with CO2 emissions that contribute to environmental problems, cement usage must be reduced and alternative aggregates must be developed. Thus, we developed and evaluated a mortar that uses feldspar as a fine aggregate, which does not require additional mineral a...

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Autores principales:	Ji-Sun Kim, Jong-Young Lee, Young-Ho Kim, Dongchan Kim, Jin Kim, Jung-Geun Han
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2022
Materias:	Feldspar Feldspar mortar Feldspar fine aggregates Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/e93b847d181946a4b8b8e1b193c7ece3
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id	oai:doaj.org-article:e93b847d181946a4b8b8e1b193c7ece3
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spelling	oai:doaj.org-article:e93b847d181946a4b8b8e1b193c7ece32021-11-22T04:25:44ZEvaluating the eco-compatibility of mortars with feldspar-based fine aggregate2214-509510.1016/j.cscm.2021.e00781https://doaj.org/article/e93b847d181946a4b8b8e1b193c7ece32022-06-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2214509521002965https://doaj.org/toc/2214-5095As cement manufacturing is associated with CO2 emissions that contribute to environmental problems, cement usage must be reduced and alternative aggregates must be developed. Thus, we developed and evaluated a mortar that uses feldspar as a fine aggregate, which does not require additional mineral admixtures. Feldspar and conventional plastering sand-based specimens were prepared with a fine aggregate proportion of 75%, 80%, or 85%. The compressive strength test results confirmed that the strength of the feldspar-based mortar was 1.1–4.5 times higher than conventional plastering sand-based mortar. Microstructure analysis after 3 and 7 d of curing revealed the existence of capillary micropores and gel pores, which improved water tightness. C-S-H and C-S-H gel hydration was also observed at the early stage, and the amount of C-S-H also increased. Further, an additional reaction may have occurred between feldspar compounds, SiO2 and Al2O3, and Ca(OH)2 that accelerated C-S-H production and contributed to the higher compressive strength. The relatively high-strength feldspar-based mortar is expected to reduce cement dependency, which can be achieved using a fine-aggregate feldspar mixing ratio according to project requirements. Thus, the proposed fine aggregate alternative can help alleviate the environmental problems associated with cement usage. It also has potential as an eco-friendly building material.Ji-Sun KimJong-Young LeeYoung-Ho KimDongchan KimJin KimJung-Geun HanElsevierarticleFeldsparFeldspar mortarFeldspar fine aggregatesMaterials of engineering and construction. Mechanics of materialsTA401-492ENCase Studies in Construction Materials, Vol 16, Iss , Pp e00781- (2022)
institution	DOAJ
collection	DOAJ
language	EN
topic	Feldspar Feldspar mortar Feldspar fine aggregates Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Feldspar Feldspar mortar Feldspar fine aggregates Materials of engineering and construction. Mechanics of materials TA401-492 Ji-Sun Kim Jong-Young Lee Young-Ho Kim Dongchan Kim Jin Kim Jung-Geun Han Evaluating the eco-compatibility of mortars with feldspar-based fine aggregate
description	As cement manufacturing is associated with CO2 emissions that contribute to environmental problems, cement usage must be reduced and alternative aggregates must be developed. Thus, we developed and evaluated a mortar that uses feldspar as a fine aggregate, which does not require additional mineral admixtures. Feldspar and conventional plastering sand-based specimens were prepared with a fine aggregate proportion of 75%, 80%, or 85%. The compressive strength test results confirmed that the strength of the feldspar-based mortar was 1.1–4.5 times higher than conventional plastering sand-based mortar. Microstructure analysis after 3 and 7 d of curing revealed the existence of capillary micropores and gel pores, which improved water tightness. C-S-H and C-S-H gel hydration was also observed at the early stage, and the amount of C-S-H also increased. Further, an additional reaction may have occurred between feldspar compounds, SiO2 and Al2O3, and Ca(OH)2 that accelerated C-S-H production and contributed to the higher compressive strength. The relatively high-strength feldspar-based mortar is expected to reduce cement dependency, which can be achieved using a fine-aggregate feldspar mixing ratio according to project requirements. Thus, the proposed fine aggregate alternative can help alleviate the environmental problems associated with cement usage. It also has potential as an eco-friendly building material.
format	article
author	Ji-Sun Kim Jong-Young Lee Young-Ho Kim Dongchan Kim Jin Kim Jung-Geun Han
author_facet	Ji-Sun Kim Jong-Young Lee Young-Ho Kim Dongchan Kim Jin Kim Jung-Geun Han
author_sort	Ji-Sun Kim
title	Evaluating the eco-compatibility of mortars with feldspar-based fine aggregate
title_short	Evaluating the eco-compatibility of mortars with feldspar-based fine aggregate
title_full	Evaluating the eco-compatibility of mortars with feldspar-based fine aggregate
title_fullStr	Evaluating the eco-compatibility of mortars with feldspar-based fine aggregate
title_full_unstemmed	Evaluating the eco-compatibility of mortars with feldspar-based fine aggregate
title_sort	evaluating the eco-compatibility of mortars with feldspar-based fine aggregate
publisher	Elsevier
publishDate	2022
url	https://doaj.org/article/e93b847d181946a4b8b8e1b193c7ece3
work_keys_str_mv	AT jisunkim evaluatingtheecocompatibilityofmortarswithfeldsparbasedfineaggregate AT jongyounglee evaluatingtheecocompatibilityofmortarswithfeldsparbasedfineaggregate AT younghokim evaluatingtheecocompatibilityofmortarswithfeldsparbasedfineaggregate AT dongchankim evaluatingtheecocompatibilityofmortarswithfeldsparbasedfineaggregate AT jinkim evaluatingtheecocompatibilityofmortarswithfeldsparbasedfineaggregate AT junggeunhan evaluatingtheecocompatibilityofmortarswithfeldsparbasedfineaggregate
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Evaluating the eco-compatibility of mortars with feldspar-based fine aggregate

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