Deformation resilient cement structures using 3D-printed molds
| Autor: | Muhammad M. Rahman, Shannon L. Eichmann, Chandra Shekhar Tiwary, Seyed Mohammad Sajadi, Anand B. Puthirath, Carl J. Thaemlitz, Devashish Salpekar, Peter J. Boul, Ashokkumar Meiyazhagan, Pulickel M. Ajayan, Amir Hossein Rahmati |
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| Rok vydání: | 2020 |
| Předmět: |
0301 basic medicine
chemistry.chemical_classification Toughness Multidisciplinary Materials science Conformal coating 02 engineering and technology Polymer 021001 nanoscience & nanotechnology Article 03 medical and health sciences Surface coating mechanical property 030104 developmental biology Brittleness Compressive strength chemistry materials structure lcsh:Q materials mechanics Cementitious Composite material Deformation (engineering) lcsh:Science 0210 nano-technology |
| Zdroj: | iScience iScience, Vol 24, Iss 3, Pp 102174-(2021) |
| ISSN: | 2589-0042 |
| Popis: | Summary Cementitious structures exhibit high compression strength but suffer from inherent brittleness. Conversely, nature creates structures using mostly brittle phases that overcome the strength-toughness trade-off, mainly through internalized packaging of brittle phases with soft organic binders. Here, we develop complex architectures of cementitious materials using an inverse replica approach where a soft polymer phase emerges as an external conformal coating. Architected polymer templates are printed, cement pastes are molded into these templates, and cementitious structures with thin polymer surface coating are achieved after the solubilization of sacrificial templates. These polymer-coated architected cementitious structures display unusual mechanical behavior with considerably higher toughness compared to conventional non-porous structures. They resist catastrophic failure through delayed damage propagation. Most interestingly, the architected structures show significant deformation recovery after releasing quasi-static loading, atypical in conventional cementitious structures. This approach allows a simple strategy to build more deformation resilient cementitious structures than their traditional counterparts. Graphical abstract Highlights • A polymer-coated architected cementitious structure is developed • Catastrophic failure is prevented through delayed damage propagation mechanisms • Significant structural recovery is observed after releasing compression loading Mechanical property; materials structure; materials mechanics |
| Databáze: | OpenAIRE |
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