The Influence of Curing Regimes in Self-Healing of Nano-Modified Cement Pastes
The present study proposes nano-calcium oxide (NC) and nano-silica (NS) particles as healing agents in cement pastes, taking into account the curing conditions. Two series of specimens were treated in water and under wetting-drying cycles. The addition of NC (1.5%wt of binder) triggered early healin...
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| Format: | Article |
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MDPI AG
2020-11-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/13/22/5301 |
| _version_ | 1797547022405861376 |
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| author | Maria Stefanidou Eirini-Chrysanthi Tsardaka Aspasia Karozou |
| author_facet | Maria Stefanidou Eirini-Chrysanthi Tsardaka Aspasia Karozou |
| author_sort | Maria Stefanidou |
| collection | DOAJ |
| description | The present study proposes nano-calcium oxide (NC) and nano-silica (NS) particles as healing agents in cement pastes, taking into account the curing conditions. Two series of specimens were treated in water and under wetting-drying cycles. The addition of NC (1.5%wt of binder) triggered early healing since cracks were healed within 14 days in underwater immersion and before 28 days at wetting-drying cycles. Attenuated Total Reflectance (ATR) spectroscopy and SEM analysis revealed that the healing products were mainly aragonite and calcite in water conditions and more amorphous carbonates under wetting-drying cycles. The combination of NS and NC (3.0%wt in total) offered healing under both curing conditions before 28 days. The presence of NS assisted toward porosity refinement and NC increased the carbonates’ content. The newly formed material was dense, and its elemental analysis by SEM revealed the C-S-H compounds that were also verified by ATR. |
| first_indexed | 2024-03-10T14:38:29Z |
| format | Article |
| id | doaj.art-f70d199fe945473fa8181ed9d9a4855b |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T14:38:29Z |
| publishDate | 2020-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-f70d199fe945473fa8181ed9d9a4855b2023-11-20T22:03:09ZengMDPI AGMaterials1996-19442020-11-011322530110.3390/ma13225301The Influence of Curing Regimes in Self-Healing of Nano-Modified Cement PastesMaria Stefanidou0Eirini-Chrysanthi Tsardaka1Aspasia Karozou2Laboratory of Building Materials, Aristotle University of Thessaloniki, 54635 Thessaloniki, GreeceLaboratory of Building Materials, Aristotle University of Thessaloniki, 54635 Thessaloniki, GreeceLaboratory of Building Materials, Aristotle University of Thessaloniki, 54635 Thessaloniki, GreeceThe present study proposes nano-calcium oxide (NC) and nano-silica (NS) particles as healing agents in cement pastes, taking into account the curing conditions. Two series of specimens were treated in water and under wetting-drying cycles. The addition of NC (1.5%wt of binder) triggered early healing since cracks were healed within 14 days in underwater immersion and before 28 days at wetting-drying cycles. Attenuated Total Reflectance (ATR) spectroscopy and SEM analysis revealed that the healing products were mainly aragonite and calcite in water conditions and more amorphous carbonates under wetting-drying cycles. The combination of NS and NC (3.0%wt in total) offered healing under both curing conditions before 28 days. The presence of NS assisted toward porosity refinement and NC increased the carbonates’ content. The newly formed material was dense, and its elemental analysis by SEM revealed the C-S-H compounds that were also verified by ATR.https://www.mdpi.com/1996-1944/13/22/5301nano-calcium oxidenano-silicaself-healingcement pastescuring regime |
| spellingShingle | Maria Stefanidou Eirini-Chrysanthi Tsardaka Aspasia Karozou The Influence of Curing Regimes in Self-Healing of Nano-Modified Cement Pastes Materials nano-calcium oxide nano-silica self-healing cement pastes curing regime |
| title | The Influence of Curing Regimes in Self-Healing of Nano-Modified Cement Pastes |
| title_full | The Influence of Curing Regimes in Self-Healing of Nano-Modified Cement Pastes |
| title_fullStr | The Influence of Curing Regimes in Self-Healing of Nano-Modified Cement Pastes |
| title_full_unstemmed | The Influence of Curing Regimes in Self-Healing of Nano-Modified Cement Pastes |
| title_short | The Influence of Curing Regimes in Self-Healing of Nano-Modified Cement Pastes |
| title_sort | influence of curing regimes in self healing of nano modified cement pastes |
| topic | nano-calcium oxide nano-silica self-healing cement pastes curing regime |
| url | https://www.mdpi.com/1996-1944/13/22/5301 |
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