Comparison of Properties of 3D-Printed Mortar in Air vs. Underwater
Research and technological advancements in 3D concrete printing (3DCP) have led to the idea of applying it to offshore construction. The effect of gravity is reduced underwater, which can have a positive effect on 3DCP. For basic verification of this idea, this study printed and additively manufactu...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-10-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/19/5888 |
| _version_ | 1797516035977379840 |
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| author | Seong-Jin Woo Jun-Mo Yang Hojae Lee Hong-Kyu Kwon |
| author_facet | Seong-Jin Woo Jun-Mo Yang Hojae Lee Hong-Kyu Kwon |
| author_sort | Seong-Jin Woo |
| collection | DOAJ |
| description | Research and technological advancements in 3D concrete printing (3DCP) have led to the idea of applying it to offshore construction. The effect of gravity is reduced underwater, which can have a positive effect on 3DCP. For basic verification of this idea, this study printed and additively manufactured specimens with the same mortar mixture in air and underwater and evaluated properties in the fresh state and the hardened state. The mechanical properties were evaluated using the specimens produced by direct casting to the mold and specimens produced by extracting from the additive part through coring and cutting. The results of the experiment show that underwater 3D printing required a greater amount of printing output than in-air 3D printing for a good print quality, and buildability was improved underwater compared to that in air. In the case of the specimen layered underwater, the density and compressive strength decreased compared to the specimen layered in air. Because there are almost no effects of moisture evaporation and bleeding in water, the interlayer bond strength of the specimen printed underwater was somewhat larger than that printed in air, while there was no effect of the deposition time interval underwater. |
| first_indexed | 2024-03-10T06:55:40Z |
| format | Article |
| id | doaj.art-115b69d881be4bf4aee466fa2dfb0eb3 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T06:55:40Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-115b69d881be4bf4aee466fa2dfb0eb32023-11-22T16:28:42ZengMDPI AGMaterials1996-19442021-10-011419588810.3390/ma14195888Comparison of Properties of 3D-Printed Mortar in Air vs. UnderwaterSeong-Jin Woo0Jun-Mo Yang1Hojae Lee2Hong-Kyu Kwon3Department of Civil Engineering, Keimyung University, 1095 Dalgubeol-daero, Dalseo-gu, Daegu 42601, KoreaDepartment of Civil Engineering, Keimyung University, 1095 Dalgubeol-daero, Dalseo-gu, Daegu 42601, KoreaKorea Institute of Civil Engineering and Building Technology, Daehwa-dong, Goyang-si 10223, KoreaDepartment of Industrial and Management Engineering, Namseoul University, 91 DaeHakro, Seonghwan-eup, Cheonan-si 31020, KoreaResearch and technological advancements in 3D concrete printing (3DCP) have led to the idea of applying it to offshore construction. The effect of gravity is reduced underwater, which can have a positive effect on 3DCP. For basic verification of this idea, this study printed and additively manufactured specimens with the same mortar mixture in air and underwater and evaluated properties in the fresh state and the hardened state. The mechanical properties were evaluated using the specimens produced by direct casting to the mold and specimens produced by extracting from the additive part through coring and cutting. The results of the experiment show that underwater 3D printing required a greater amount of printing output than in-air 3D printing for a good print quality, and buildability was improved underwater compared to that in air. In the case of the specimen layered underwater, the density and compressive strength decreased compared to the specimen layered in air. Because there are almost no effects of moisture evaporation and bleeding in water, the interlayer bond strength of the specimen printed underwater was somewhat larger than that printed in air, while there was no effect of the deposition time interval underwater.https://www.mdpi.com/1996-1944/14/19/58883D concrete printing3D printing underwatermortar printingcompressive strengthflexural tensile strengthinterlayer bond strength |
| spellingShingle | Seong-Jin Woo Jun-Mo Yang Hojae Lee Hong-Kyu Kwon Comparison of Properties of 3D-Printed Mortar in Air vs. Underwater Materials 3D concrete printing 3D printing underwater mortar printing compressive strength flexural tensile strength interlayer bond strength |
| title | Comparison of Properties of 3D-Printed Mortar in Air vs. Underwater |
| title_full | Comparison of Properties of 3D-Printed Mortar in Air vs. Underwater |
| title_fullStr | Comparison of Properties of 3D-Printed Mortar in Air vs. Underwater |
| title_full_unstemmed | Comparison of Properties of 3D-Printed Mortar in Air vs. Underwater |
| title_short | Comparison of Properties of 3D-Printed Mortar in Air vs. Underwater |
| title_sort | comparison of properties of 3d printed mortar in air vs underwater |
| topic | 3D concrete printing 3D printing underwater mortar printing compressive strength flexural tensile strength interlayer bond strength |
| url | https://www.mdpi.com/1996-1944/14/19/5888 |
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