A comparative evaluation of sepiolite and nano-montmorillonite on the rheology of cementitious materials for 3D printing
dc.contributor.author | Aydın, Eylül Mina | |
dc.contributor.author | Kara, Ahmet Burhan | |
dc.contributor.author | Bundur, Zeynep Başaran | |
dc.contributor.author | Özyurt, N. | |
dc.contributor.author | Bebek, Özkan | |
dc.contributor.author | Gulgun, M. A. | |
dc.date.accessioned | 2023-06-13T11:22:43Z | |
dc.date.available | 2023-06-13T11:22:43Z | |
dc.date.issued | 2022-10-03 | |
dc.identifier.issn | 0950-0618 | en_US |
dc.identifier.uri | http://hdl.handle.net/10679/8388 | |
dc.identifier.uri | https://www.sciencedirect.com/science/article/pii/S0950061822025910 | |
dc.description.abstract | Through the last decade, methods of digital manufacturing of concrete gained a significant interest compared to conventional concrete. The main challenge in additive manufacturing (3D printing) is to design a highly thixotropic cementitious system. This study aims to investigate the use of sepiolite as a rheology modifier as a novel approach to improve the thixotropic behavior and adapt cementitious systems to 3D printing. To understand the influence of sepiolite on rheological properties, a comparative evaluation with nano-montmorillonite was established. The effectiveness of clay addition was also investigated in fly-ash amended cement-based materials. The rheological analysis was done on cement-paste samples containing both clays in terms of their effects on thixotropy, structural build-up, and recovery. A preliminary printability assessment was done with a lab scale printer having a ram extruder. The results show that the incorporation of clays increased the dynamic yield stress and time-dependent evolution of static yield stress. Moreover, the addition of clays improved the thixotropic behavior of cement-based systems, particularly those containing fly-ash. Herein, the sepiolite was found to be more effective compared to nano-montmorillonite in terms of improving thixotropy, structural build-up and recovery. The results showed that use of fly-ash enhances the printability of the mix for the specified extruder and the samples containing 1% nano-montmorillonite or 0.5% sepiolite can be printed. The positive effects of sepiolite were attributed to opposing surface charges of the clay layers and its micro-fibrous microstructure. The findings in this study enabled an in-depth understanding of the rheology and printability of fly-ash amended clay containing printable cement-based mortars. | en_US |
dc.description.sponsorship | TÜBİTAK | |
dc.language.iso | eng | en_US |
dc.publisher | Elsevier | en_US |
dc.relation | info:turkey/grantAgreement/TUBITAK/MAG-119 M520 | |
dc.relation.ispartof | Construction and Building Materials | |
dc.rights | restrictedAccess | |
dc.title | A comparative evaluation of sepiolite and nano-montmorillonite on the rheology of cementitious materials for 3D printing | en_US |
dc.type | Article | en_US |
dc.peerreviewed | yes | en_US |
dc.publicationstatus | Published | en_US |
dc.contributor.department | Özyeğin University | |
dc.contributor.authorID | (ORCID 0000-0003-1398-4021 & YÖK ID 205281) Başaran, Zeynep | |
dc.contributor.authorID | (ORCID 0000-0003-2721-9777 & YÖK ID 43734) Bebek, Özkan | |
dc.contributor.ozuauthor | Bundur, Zeynep Başaran | |
dc.contributor.ozuauthor | Bebek, Özkan | |
dc.identifier.volume | 350 | en_US |
dc.identifier.wos | WOS:000855127500001 | |
dc.identifier.doi | 10.1016/j.conbuildmat.2022.128935 | en_US |
dc.subject.keywords | Mineral additives | en_US |
dc.subject.keywords | Rheology | en_US |
dc.subject.keywords | Sepiolite | en_US |
dc.subject.keywords | Thixotropy | en_US |
dc.subject.keywords | Three-dimensional (3D) printing | en_US |
dc.identifier.scopus | SCOPUS:2-s2.0-85136531230 | |
dc.contributor.ozugradstudent | Aydın, Eylül Mina | |
dc.contributor.ozugradstudent | Kara, Ahmet Burhan | |
dc.relation.publicationcategory | Article - International Refereed Journal - Institutional Academic Staff and Graduate Student |
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