Investigation of the Internal Structure of Hardened 3D-Printed Concrete by X-CT Scanning and Its Influence on the Mechanical Performance

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dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorChen, Yanjuanen_US
dc.contributor.authorKuva, Jukkaen_US
dc.contributor.authorMohite, Ashishen_US
dc.contributor.authorLi, Zhongsenen_US
dc.contributor.authorRahier, Huberten_US
dc.contributor.authorAl-Neshawy, Fahimen_US
dc.contributor.authorShu, Jiangpengen_US
dc.contributor.departmentDepartment of Mechanical Engineeringen
dc.contributor.departmentDepartment of Civil Engineeringen
dc.contributor.groupauthorMaterials to Productsen
dc.contributor.groupauthorMineral Based Materials and Mechanicsen
dc.contributor.organizationVrije Universiteit Brusselen_US
dc.contributor.organizationGeological Survey of Finlanden_US
dc.contributor.organizationZhejiang Universityen_US
dc.date.accessioned2023-04-19T06:06:39Z
dc.date.available2023-04-19T06:06:39Z
dc.date.issued2023-03en_US
dc.descriptionFunding Information: This work was supported by the European Union Horizon 2020 research programme under MSCA COFUND grant agreement 101034352 with co-funding from the VUB-Industrial Research Fund: X-ray tomography was also supported by the Academy of Finland via RAMI infrastructure project (#293109). Publisher Copyright: © 2023 by the authors.
dc.description.abstractAs we know, 3DPC is printed layer by layer compared with mold-casting conventional concrete. Pore structure and layer-to-layer interface are two main aspects of the internal structure for 3DPC, which decide 3DPC’s mechanical performance. The layer-to-layer interface caused by printing is specific to 3DPC. The emphasis of this study lies in the layer-to-layer interfaces of 3DPC. The first aim of this study is to quantify the characteristics of the layer-to-layer interface and therefore characterize different aspects of the interfaces. The second aim of this study is to explore how the internal structure of printed concrete influences the mechanical performance of 3DPC. This research set out to design a series of experimental comparisons between 3DPC and casted concrete with the same compositions. Mechanical tests, i.e., compressive stress, ultrasonic Pulse Velocity test, flexural tension, and tension splitting, as well as the Ultrasonic Pulse Velocity test, were performed to check the mechanical performance of 3DPC. Contrary to what has often been expected, the mechanical test results showed the printed concrete has a quality not worse than casted concrete with the same recipe. Meanwhile, the X-ray computed tomography (X-CT) is used to characterize the internal structure, pore shapes, and interfaces of 3DPC. First, the investigation revealed that the lower total porosity and fewer big voids could be the fundamental causes meaning 3DPC has a better mechanical performance than casted concrete. Second, the statistics based on aspect ratio show that the distribution curves follow similar trends, regardless of the printed or casted concrete. Third, this study quantified the depth of the different interfaces for 3DPC. The results suggest that the porosity in an interface varies in a range. The author’s pioneer work has contributed to our present understanding of the interfaces of 3DPC.en
dc.description.versionPeer revieweden
dc.format.extent26
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationChen, Y, Kuva, J, Mohite, A, Li, Z, Rahier, H, Al-Neshawy, F & Shu, J 2023, ' Investigation of the Internal Structure of Hardened 3D-Printed Concrete by X-CT Scanning and Its Influence on the Mechanical Performance ', Materials, vol. 16, no. 6, 2534 . https://doi.org/10.3390/ma16062534en
dc.identifier.doi10.3390/ma16062534en_US
dc.identifier.issn1996-1944
dc.identifier.otherPURE UUID: a61f86ec-2756-459b-ac4a-9339db5afd3den_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/a61f86ec-2756-459b-ac4a-9339db5afd3den_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85151994606&partnerID=8YFLogxKen_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/106028116/materials_16_02534.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/120474
dc.identifier.urnURN:NBN:fi:aalto-202304192790
dc.language.isoenen
dc.publisherMDPI AG
dc.relation.ispartofseriesMaterialsen
dc.relation.ispartofseriesVolume 16, issue 6en
dc.rightsopenAccessen
dc.subject.keyword3D-printed concreteen_US
dc.subject.keywordhardened concreteen_US
dc.subject.keywordinterfaceen_US
dc.subject.keywordinternal structureen_US
dc.subject.keywordX-ray computed tomographyen_US
dc.titleInvestigation of the Internal Structure of Hardened 3D-Printed Concrete by X-CT Scanning and Its Influence on the Mechanical Performanceen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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