Thermogravimetric analysis (TGA) for characterization of self-cementationof recycled concrete aggregates in pavement
International audience A key question concerning the application of recycled concrete aggregates (RCA) into pavement is the assessmentof self-cementing properties of RCA, which increase the strength and stiffness of unbound base and subbaselayers. In this paper, the assessment of self-cementing prop...
Published in: | Thermochimica Acta |
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HAL CCSD
2024
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Online Access: | https://hal.science/hal-04408957 https://hal.science/hal-04408957/document https://hal.science/hal-04408957/file/Chong-Wang%20%20-%20Thermochimica%20acta.pdf https://doi.org/10.1016/j.tca.2024.179680 |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
language |
English |
topic |
Recycled concrete aggregate Self-cementing properties Thermogravimetric analysis Microstructure Road base [SPI]Engineering Sciences [physics] |
spellingShingle |
Recycled concrete aggregate Self-cementing properties Thermogravimetric analysis Microstructure Road base [SPI]Engineering Sciences [physics] Wang, Chong Chazallon, Cyrille Braymand, Sandrine Hornych, Pierre Thermogravimetric analysis (TGA) for characterization of self-cementationof recycled concrete aggregates in pavement |
topic_facet |
Recycled concrete aggregate Self-cementing properties Thermogravimetric analysis Microstructure Road base [SPI]Engineering Sciences [physics] |
description |
International audience A key question concerning the application of recycled concrete aggregates (RCA) into pavement is the assessmentof self-cementing properties of RCA, which increase the strength and stiffness of unbound base and subbaselayers. In this paper, the assessment of self-cementing properties of RCA, the hydration of unhydrated binder andtheir influence on the microstructure and mechanical behaviour were studied by subjecting two different RCA(NRCA and ORCA, showing significantly different self-cementing properties), after curing for 0, 360 and 720days, to the thermogravimetric analysis (TGA), scanning electron microscopic analysis (SEM) and monotonictriaxial tests. The results show that the unhydrated binder content of NRCA is low (between 6.2% and 7.9% infines), and most of the unhydrated binder was hydrated after curing for 360 days. Besides, the sulfate attackproducts, ettringite, were also observed from both TGA and SEM, which could also lead to the self-cementingproperties. The hydration products of unhydrated cement and sulfate attack products not only form bonds betweenparticles, but also fill the small pores (width less than 3 μm), turning the open type of an unboundstructure to a rigid dense skeleton structure. |
author2 |
Laboratoire des sciences de l'ingénieur, de l'informatique et de l'imagerie (ICube) École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Université de Strasbourg (UNISTRA)-Institut National des Sciences Appliquées - Strasbourg (INSA Strasbourg) Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Les Hôpitaux Universitaires de Strasbourg (HUS)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE) Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS) Shandong Jianzhu University Laboratoire Auscultation, Modélisation, Expérimentation des infrastructures de transport (MAST-LAMES ) Université Gustave Eiffel |
format |
Article in Journal/Newspaper |
author |
Wang, Chong Chazallon, Cyrille Braymand, Sandrine Hornych, Pierre |
author_facet |
Wang, Chong Chazallon, Cyrille Braymand, Sandrine Hornych, Pierre |
author_sort |
Wang, Chong |
title |
Thermogravimetric analysis (TGA) for characterization of self-cementationof recycled concrete aggregates in pavement |
title_short |
Thermogravimetric analysis (TGA) for characterization of self-cementationof recycled concrete aggregates in pavement |
title_full |
Thermogravimetric analysis (TGA) for characterization of self-cementationof recycled concrete aggregates in pavement |
title_fullStr |
Thermogravimetric analysis (TGA) for characterization of self-cementationof recycled concrete aggregates in pavement |
title_full_unstemmed |
Thermogravimetric analysis (TGA) for characterization of self-cementationof recycled concrete aggregates in pavement |
title_sort |
thermogravimetric analysis (tga) for characterization of self-cementationof recycled concrete aggregates in pavement |
publisher |
HAL CCSD |
publishDate |
2024 |
url |
https://hal.science/hal-04408957 https://hal.science/hal-04408957/document https://hal.science/hal-04408957/file/Chong-Wang%20%20-%20Thermochimica%20acta.pdf https://doi.org/10.1016/j.tca.2024.179680 |
genre |
Orca |
genre_facet |
Orca |
op_source |
ISSN: 0040-6031 EISSN: 1872-762X Thermochimica Acta https://hal.science/hal-04408957 Thermochimica Acta, 2024, 733, pp.179680. ⟨10.1016/j.tca.2024.179680⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.tca.2024.179680 hal-04408957 https://hal.science/hal-04408957 https://hal.science/hal-04408957/document https://hal.science/hal-04408957/file/Chong-Wang%20%20-%20Thermochimica%20acta.pdf doi:10.1016/j.tca.2024.179680 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.tca.2024.179680 |
container_title |
Thermochimica Acta |
container_volume |
733 |
container_start_page |
179680 |
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ftccsdartic:oai:HAL:hal-04408957v1 2024-02-27T08:44:19+00:00 Thermogravimetric analysis (TGA) for characterization of self-cementationof recycled concrete aggregates in pavement Wang, Chong Chazallon, Cyrille Braymand, Sandrine Hornych, Pierre Laboratoire des sciences de l'ingénieur, de l'informatique et de l'imagerie (ICube) École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Université de Strasbourg (UNISTRA)-Institut National des Sciences Appliquées - Strasbourg (INSA Strasbourg) Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Les Hôpitaux Universitaires de Strasbourg (HUS)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE) Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS) Shandong Jianzhu University Laboratoire Auscultation, Modélisation, Expérimentation des infrastructures de transport (MAST-LAMES ) Université Gustave Eiffel 2024-03 https://hal.science/hal-04408957 https://hal.science/hal-04408957/document https://hal.science/hal-04408957/file/Chong-Wang%20%20-%20Thermochimica%20acta.pdf https://doi.org/10.1016/j.tca.2024.179680 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.tca.2024.179680 hal-04408957 https://hal.science/hal-04408957 https://hal.science/hal-04408957/document https://hal.science/hal-04408957/file/Chong-Wang%20%20-%20Thermochimica%20acta.pdf doi:10.1016/j.tca.2024.179680 http://creativecommons.org/licenses/by-nc-nd/ info:eu-repo/semantics/OpenAccess ISSN: 0040-6031 EISSN: 1872-762X Thermochimica Acta https://hal.science/hal-04408957 Thermochimica Acta, 2024, 733, pp.179680. ⟨10.1016/j.tca.2024.179680⟩ Recycled concrete aggregate Self-cementing properties Thermogravimetric analysis Microstructure Road base [SPI]Engineering Sciences [physics] info:eu-repo/semantics/article Journal articles 2024 ftccsdartic https://doi.org/10.1016/j.tca.2024.179680 2024-01-28T00:01:56Z International audience A key question concerning the application of recycled concrete aggregates (RCA) into pavement is the assessmentof self-cementing properties of RCA, which increase the strength and stiffness of unbound base and subbaselayers. In this paper, the assessment of self-cementing properties of RCA, the hydration of unhydrated binder andtheir influence on the microstructure and mechanical behaviour were studied by subjecting two different RCA(NRCA and ORCA, showing significantly different self-cementing properties), after curing for 0, 360 and 720days, to the thermogravimetric analysis (TGA), scanning electron microscopic analysis (SEM) and monotonictriaxial tests. The results show that the unhydrated binder content of NRCA is low (between 6.2% and 7.9% infines), and most of the unhydrated binder was hydrated after curing for 360 days. Besides, the sulfate attackproducts, ettringite, were also observed from both TGA and SEM, which could also lead to the self-cementingproperties. The hydration products of unhydrated cement and sulfate attack products not only form bonds betweenparticles, but also fill the small pores (width less than 3 μm), turning the open type of an unboundstructure to a rigid dense skeleton structure. Article in Journal/Newspaper Orca Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Thermochimica Acta 733 179680 |