THz Fingerprints of Cement-Based Materials
To find materials with an appropriate response to THz radiation is key for the incoming THz technology revolution. Unfortunately, this region of the electromagnetic spectra remains largely unexplored in most materials. The present work aims at unveiling the most significant THz fingerprints of cemen...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-09-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/13/18/4194 |
| _version_ | 1797553045610954752 |
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| author | Jorge S. Dolado Guido Goracci Eduardo Duque Pavel Martauz Yibing Zuo Guang Ye |
| author_facet | Jorge S. Dolado Guido Goracci Eduardo Duque Pavel Martauz Yibing Zuo Guang Ye |
| author_sort | Jorge S. Dolado |
| collection | DOAJ |
| description | To find materials with an appropriate response to THz radiation is key for the incoming THz technology revolution. Unfortunately, this region of the electromagnetic spectra remains largely unexplored in most materials. The present work aims at unveiling the most significant THz fingerprints of cement-based materials. To this end transmission experiments have been carried out over Ordinary Portland Cement (OPC) and geopolymer (GEO) binder cement pastes in combination with atomistic simulations. These simulations have calculated for the first time, the dielectric response of C-S-H and N-A-S-H gels, the most important hydration products of OPC and GEO cement pastes respectively. Interestingly both the experiments and simulations reveal that both varieties of cement pastes exhibit three main characteristic peaks at frequencies around ~0.6 THz, ~1.05 THz and ~1.35 THz, whose origin is governed by the complex dynamic of their water content, and two extra signals at ~1.95 THz and ~2.75 THz which are likely related to modes involving floppy parts of the dried skeleton. |
| first_indexed | 2024-03-10T16:10:50Z |
| format | Article |
| id | doaj.art-905c89d748a44e249207776f5283a98c |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T16:10:50Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-905c89d748a44e249207776f5283a98c2023-11-20T14:31:11ZengMDPI AGMaterials1996-19442020-09-011318419410.3390/ma13184194THz Fingerprints of Cement-Based MaterialsJorge S. Dolado0Guido Goracci1Eduardo Duque2Pavel Martauz3Yibing Zuo4Guang Ye5Centro de Física de Materiales, CSIC-UPV/EHU, Paseo Manuel de Lardizabal 5, 20018 Donostia/San Sebastián, SpainCentro de Física de Materiales, CSIC-UPV/EHU, Paseo Manuel de Lardizabal 5, 20018 Donostia/San Sebastián, SpainDonostia International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, 20018 Donostia/San Sebastián, SpainPovazska Cementaren a.s., Ladce, 01863 Ladce, SlovakiaMicrolab, Section Materials and Environment, Faculty of Civil Engineering and Geosciences, Delft University of Technology (TU DELFT), Stevinweg 1, 2628 CN Delft, The NetherlandsMicrolab, Section Materials and Environment, Faculty of Civil Engineering and Geosciences, Delft University of Technology (TU DELFT), Stevinweg 1, 2628 CN Delft, The NetherlandsTo find materials with an appropriate response to THz radiation is key for the incoming THz technology revolution. Unfortunately, this region of the electromagnetic spectra remains largely unexplored in most materials. The present work aims at unveiling the most significant THz fingerprints of cement-based materials. To this end transmission experiments have been carried out over Ordinary Portland Cement (OPC) and geopolymer (GEO) binder cement pastes in combination with atomistic simulations. These simulations have calculated for the first time, the dielectric response of C-S-H and N-A-S-H gels, the most important hydration products of OPC and GEO cement pastes respectively. Interestingly both the experiments and simulations reveal that both varieties of cement pastes exhibit three main characteristic peaks at frequencies around ~0.6 THz, ~1.05 THz and ~1.35 THz, whose origin is governed by the complex dynamic of their water content, and two extra signals at ~1.95 THz and ~2.75 THz which are likely related to modes involving floppy parts of the dried skeleton.https://www.mdpi.com/1996-1944/13/18/4194THz characterizationatomistic modellingcementitious structure |
| spellingShingle | Jorge S. Dolado Guido Goracci Eduardo Duque Pavel Martauz Yibing Zuo Guang Ye THz Fingerprints of Cement-Based Materials Materials THz characterization atomistic modelling cementitious structure |
| title | THz Fingerprints of Cement-Based Materials |
| title_full | THz Fingerprints of Cement-Based Materials |
| title_fullStr | THz Fingerprints of Cement-Based Materials |
| title_full_unstemmed | THz Fingerprints of Cement-Based Materials |
| title_short | THz Fingerprints of Cement-Based Materials |
| title_sort | thz fingerprints of cement based materials |
| topic | THz characterization atomistic modelling cementitious structure |
| url | https://www.mdpi.com/1996-1944/13/18/4194 |
| work_keys_str_mv | AT jorgesdolado thzfingerprintsofcementbasedmaterials AT guidogoracci thzfingerprintsofcementbasedmaterials AT eduardoduque thzfingerprintsofcementbasedmaterials AT pavelmartauz thzfingerprintsofcementbasedmaterials AT yibingzuo thzfingerprintsofcementbasedmaterials AT guangye thzfingerprintsofcementbasedmaterials |