Feasibility study of cement-stabilized materials using 100% mixed recycled aggregates from perspectives of mechanical properties and microstructure

The research on the highly efficient reutilization of mixed recycled aggregates (MRA) produced from construction and demolition waste has attracted significant attention globally. In this study, the feasibility of using 100% MRA in cement-stabilized materials was investigated. The mechanical propert...

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Autores principales:	Meng Tao, Lian Songsong, Ying Kanjun, Yu Hongming
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	mixed recycled aggregates cement-stabilized materials mechanical properties microstructure Technology T Chemical technology TP1-1185
Acceso en línea:	https://doaj.org/article/bdaf9bf6f176443c81bdc9c6ebb42d60
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spelling	oai:doaj.org-article:bdaf9bf6f176443c81bdc9c6ebb42d602021-12-05T14:11:03ZFeasibility study of cement-stabilized materials using 100% mixed recycled aggregates from perspectives of mechanical properties and microstructure1605-812710.1515/rams-2021-0031https://doaj.org/article/bdaf9bf6f176443c81bdc9c6ebb42d602021-07-01T00:00:00Zhttps://doi.org/10.1515/rams-2021-0031https://doaj.org/toc/1605-8127The research on the highly efficient reutilization of mixed recycled aggregates (MRA) produced from construction and demolition waste has attracted significant attention globally. In this study, the feasibility of using 100% MRA in cement-stabilized materials was investigated. The mechanical properties and microstructures of cement-stabilized MRA (CSMRA) materials containing 100% MRA were systematically examined through unconfined compressive strength (UCS) test, indirect tensile strength (ITS) test, drying shrinkage test, X-ray diffraction analysis, mercury intrusion porosimetry, and scanning electron microscopy. Results showed that the UCS and ITS of CSMRA materials were significantly enhanced with the increase of cement content and curing age, and there was almost a linear relationship between the UCS and ITS. The failure behavior of CSMRA materials under load showed three typical stages: compaction stage, elastic stage, and yield stage. The increase of the cement content caused the drying shrinkage deformation of CSMRA to increase sharply when the cement content exceeded 4%. The microstructural analysis indicated that cement had both filling and binding effects on CSMRA materials. The strength growth with cement content and curing age was because of the constant hydration of cement minerals, producing more calcium silicate hydrate binders between aggregates. Moreover, the increasing cement content could reduce the porosity and optimize the pore structure distribution of CSMRA materials. The findings of this study demonstrate that the use of 100% MRA in cement-stabilized materials as a road base is feasible, which will significantly enhance the utilization efficiency of MRA.Meng TaoLian SongsongYing KanjunYu HongmingDe Gruyterarticlemixed recycled aggregatescement-stabilized materialsmechanical propertiesmicrostructureTechnologyTChemical technologyTP1-1185ENReviews on Advanced Materials Science, Vol 60, Iss 1, Pp 490-502 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	mixed recycled aggregates cement-stabilized materials mechanical properties microstructure Technology T Chemical technology TP1-1185
spellingShingle	mixed recycled aggregates cement-stabilized materials mechanical properties microstructure Technology T Chemical technology TP1-1185 Meng Tao Lian Songsong Ying Kanjun Yu Hongming Feasibility study of cement-stabilized materials using 100% mixed recycled aggregates from perspectives of mechanical properties and microstructure
description	The research on the highly efficient reutilization of mixed recycled aggregates (MRA) produced from construction and demolition waste has attracted significant attention globally. In this study, the feasibility of using 100% MRA in cement-stabilized materials was investigated. The mechanical properties and microstructures of cement-stabilized MRA (CSMRA) materials containing 100% MRA were systematically examined through unconfined compressive strength (UCS) test, indirect tensile strength (ITS) test, drying shrinkage test, X-ray diffraction analysis, mercury intrusion porosimetry, and scanning electron microscopy. Results showed that the UCS and ITS of CSMRA materials were significantly enhanced with the increase of cement content and curing age, and there was almost a linear relationship between the UCS and ITS. The failure behavior of CSMRA materials under load showed three typical stages: compaction stage, elastic stage, and yield stage. The increase of the cement content caused the drying shrinkage deformation of CSMRA to increase sharply when the cement content exceeded 4%. The microstructural analysis indicated that cement had both filling and binding effects on CSMRA materials. The strength growth with cement content and curing age was because of the constant hydration of cement minerals, producing more calcium silicate hydrate binders between aggregates. Moreover, the increasing cement content could reduce the porosity and optimize the pore structure distribution of CSMRA materials. The findings of this study demonstrate that the use of 100% MRA in cement-stabilized materials as a road base is feasible, which will significantly enhance the utilization efficiency of MRA.
format	article
author	Meng Tao Lian Songsong Ying Kanjun Yu Hongming
author_facet	Meng Tao Lian Songsong Ying Kanjun Yu Hongming
author_sort	Meng Tao
title	Feasibility study of cement-stabilized materials using 100% mixed recycled aggregates from perspectives of mechanical properties and microstructure
title_short	Feasibility study of cement-stabilized materials using 100% mixed recycled aggregates from perspectives of mechanical properties and microstructure
title_full	Feasibility study of cement-stabilized materials using 100% mixed recycled aggregates from perspectives of mechanical properties and microstructure
title_fullStr	Feasibility study of cement-stabilized materials using 100% mixed recycled aggregates from perspectives of mechanical properties and microstructure
title_full_unstemmed	Feasibility study of cement-stabilized materials using 100% mixed recycled aggregates from perspectives of mechanical properties and microstructure
title_sort	feasibility study of cement-stabilized materials using 100% mixed recycled aggregates from perspectives of mechanical properties and microstructure
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/bdaf9bf6f176443c81bdc9c6ebb42d60
work_keys_str_mv	AT mengtao feasibilitystudyofcementstabilizedmaterialsusing100mixedrecycledaggregatesfromperspectivesofmechanicalpropertiesandmicrostructure AT liansongsong feasibilitystudyofcementstabilizedmaterialsusing100mixedrecycledaggregatesfromperspectivesofmechanicalpropertiesandmicrostructure AT yingkanjun feasibilitystudyofcementstabilizedmaterialsusing100mixedrecycledaggregatesfromperspectivesofmechanicalpropertiesandmicrostructure AT yuhongming feasibilitystudyofcementstabilizedmaterialsusing100mixedrecycledaggregatesfromperspectivesofmechanicalpropertiesandmicrostructure
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Feasibility study of cement-stabilized materials using 100% mixed recycled aggregates from perspectives of mechanical properties and microstructure

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