Development of novel concave and convex trowels for higher interlayer strength of 3D printed cement paste
Past experimental results have shown that the use of nozzle trowels can enhance the interlayer strength of 3D printed cement paste. In this study, the design is further optimized by introducing concave and convex shapes onto the nozzle trowel design. A technique for accurate simulation of the interl...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/181299 |
| _version_ | 1826124120650153984 |
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| author | He, Lewei Pan, Jiahui Hee, Yu Sheng Chen, Hao Li, Leo Gu Panda, Biranchi Chow, Wai Tuck |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering He, Lewei Pan, Jiahui Hee, Yu Sheng Chen, Hao Li, Leo Gu Panda, Biranchi Chow, Wai Tuck |
| author_sort | He, Lewei |
| collection | NTU |
| description | Past experimental results have shown that the use of nozzle trowels can enhance the interlayer strength of 3D printed cement paste. In this study, the design is further optimized by introducing concave and convex shapes onto the nozzle trowel design. A technique for accurate simulation of the interlayer stresses with the influence of nozzle trowels is established, and it is found that the nozzle trowels double the maximum shear stress and increase the maximum pressure by about 114 %. Moreover, the concave and convex nozzle trowels with removal of interlayer notch further increase the interlayer strength by 35 %. A theoretical model is also proposed to predict the interface geometry and then validated by the experimental observations on the concave and convex trowels. These findings not only result in 3D printed cement paste with much higher interlayer strength, but also emphasize the importance of nozzle designing with optimal interlayer stresses and interface geometries in the application of 3D concrete printing (3DCP). |
| first_indexed | 2025-03-09T13:41:12Z |
| format | Journal Article |
| id | ntu-10356/181299 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-03-09T13:41:12Z |
| publishDate | 2024 |
| record_format | dspace |
| spelling | ntu-10356/1812992024-11-30T16:48:39Z Development of novel concave and convex trowels for higher interlayer strength of 3D printed cement paste He, Lewei Pan, Jiahui Hee, Yu Sheng Chen, Hao Li, Leo Gu Panda, Biranchi Chow, Wai Tuck School of Mechanical and Aerospace Engineering Engineering 3D Concrete printing Interlayer strength Past experimental results have shown that the use of nozzle trowels can enhance the interlayer strength of 3D printed cement paste. In this study, the design is further optimized by introducing concave and convex shapes onto the nozzle trowel design. A technique for accurate simulation of the interlayer stresses with the influence of nozzle trowels is established, and it is found that the nozzle trowels double the maximum shear stress and increase the maximum pressure by about 114 %. Moreover, the concave and convex nozzle trowels with removal of interlayer notch further increase the interlayer strength by 35 %. A theoretical model is also proposed to predict the interface geometry and then validated by the experimental observations on the concave and convex trowels. These findings not only result in 3D printed cement paste with much higher interlayer strength, but also emphasize the importance of nozzle designing with optimal interlayer stresses and interface geometries in the application of 3D concrete printing (3DCP). Nanyang Technological University National Research Foundation (NRF) Published version This work is supported by the National Natural Science Foundation of China under Grant 52308250, the STI 2030-Major Projects under grant 2022ZD0208900, the Guangdong Basic and Applied Basic Research Foundation under grant 2024A1515010524, and the Major Projects of Colleges and Universities in Guangdong Province under grant 2023ZDZX2021. The authors also acknowledge the financial and technical support from National Research Foundation, Singapore, SempCorp. Design & Construction Pte Ltd., and Singapore Centre for 3D Printing (SC3DP). 2024-11-25T00:38:53Z 2024-11-25T00:38:53Z 2024 Journal Article He, L., Pan, J., Hee, Y. S., Chen, H., Li, L. G., Panda, B. & Chow, W. T. (2024). Development of novel concave and convex trowels for higher interlayer strength of 3D printed cement paste. Case Studies in Construction Materials, 21, e03745-. https://dx.doi.org/10.1016/j.cscm.2024.e03745 2214-5095 https://hdl.handle.net/10356/181299 10.1016/j.cscm.2024.e03745 2-s2.0-85203539740 21 e03745 en Case Studies in Construction Materials © 2024 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/). application/pdf |
| spellingShingle | Engineering 3D Concrete printing Interlayer strength He, Lewei Pan, Jiahui Hee, Yu Sheng Chen, Hao Li, Leo Gu Panda, Biranchi Chow, Wai Tuck Development of novel concave and convex trowels for higher interlayer strength of 3D printed cement paste |
| title | Development of novel concave and convex trowels for higher interlayer strength of 3D printed cement paste |
| title_full | Development of novel concave and convex trowels for higher interlayer strength of 3D printed cement paste |
| title_fullStr | Development of novel concave and convex trowels for higher interlayer strength of 3D printed cement paste |
| title_full_unstemmed | Development of novel concave and convex trowels for higher interlayer strength of 3D printed cement paste |
| title_short | Development of novel concave and convex trowels for higher interlayer strength of 3D printed cement paste |
| title_sort | development of novel concave and convex trowels for higher interlayer strength of 3d printed cement paste |
| topic | Engineering 3D Concrete printing Interlayer strength |
| url | https://hdl.handle.net/10356/181299 |
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