Multiphase Model for Predicting the Thermal Conductivity of Cement Paste and Its Applications
Thermal conductivity plays a significant role in controlling thermal cracking of cement-based materials. In this study, the thermal conductivity of cement paste at an early age was measured by the hot plate method. The test results showed that the thermal conductivity of cement paste decreased with...
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MDPI AG
2021-08-01
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| Online Access: | https://www.mdpi.com/1996-1944/14/16/4525 |
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| author | Yuanbo Du Yong Ge |
| author_facet | Yuanbo Du Yong Ge |
| author_sort | Yuanbo Du |
| collection | DOAJ |
| description | Thermal conductivity plays a significant role in controlling thermal cracking of cement-based materials. In this study, the thermal conductivity of cement paste at an early age was measured by the hot plate method. The test results showed that the thermal conductivity of cement paste decreased with the increase of water/cement ratio and curing age. Meanwhile, a multiphase model for the thermal conductivity of cement paste was proposed and used to study the influence of saturation and curing temperature on the thermal conductivity of cement paste. To determine the parameters involved in this model, the thermal conductivity of each phase in cement paste was calculated by the molecular dynamic simulation method, and the hydration of cement was simulated by the Virtual Cement and Concrete Testing Laboratory. The inversion results showed that the relative error between experimental and simulation results lay between 1.1% and 6.5%. The thermal conductivity of paste in the saturated condition was 14.9–32.3% higher than that in the dry state. With the curing temperature increasing from 10 °C to 60 °C, the thermal conductivity of cement paste decreased by 3.9–4.9% depending on the water/cement ratio. |
| first_indexed | 2024-03-10T08:38:37Z |
| format | Article |
| id | doaj.art-fb83db435a694027bfff84ad007298ea |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T08:38:37Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-fb83db435a694027bfff84ad007298ea2023-11-22T08:28:49ZengMDPI AGMaterials1996-19442021-08-011416452510.3390/ma14164525Multiphase Model for Predicting the Thermal Conductivity of Cement Paste and Its ApplicationsYuanbo Du0Yong Ge1School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin 150090, ChinaSchool of Transportation Science and Engineering, Harbin Institute of Technology, Harbin 150090, ChinaThermal conductivity plays a significant role in controlling thermal cracking of cement-based materials. In this study, the thermal conductivity of cement paste at an early age was measured by the hot plate method. The test results showed that the thermal conductivity of cement paste decreased with the increase of water/cement ratio and curing age. Meanwhile, a multiphase model for the thermal conductivity of cement paste was proposed and used to study the influence of saturation and curing temperature on the thermal conductivity of cement paste. To determine the parameters involved in this model, the thermal conductivity of each phase in cement paste was calculated by the molecular dynamic simulation method, and the hydration of cement was simulated by the Virtual Cement and Concrete Testing Laboratory. The inversion results showed that the relative error between experimental and simulation results lay between 1.1% and 6.5%. The thermal conductivity of paste in the saturated condition was 14.9–32.3% higher than that in the dry state. With the curing temperature increasing from 10 °C to 60 °C, the thermal conductivity of cement paste decreased by 3.9–4.9% depending on the water/cement ratio.https://www.mdpi.com/1996-1944/14/16/4525cement pastethermal conductivitymolecular dynamic methodcuring temperature |
| spellingShingle | Yuanbo Du Yong Ge Multiphase Model for Predicting the Thermal Conductivity of Cement Paste and Its Applications Materials cement paste thermal conductivity molecular dynamic method curing temperature |
| title | Multiphase Model for Predicting the Thermal Conductivity of Cement Paste and Its Applications |
| title_full | Multiphase Model for Predicting the Thermal Conductivity of Cement Paste and Its Applications |
| title_fullStr | Multiphase Model for Predicting the Thermal Conductivity of Cement Paste and Its Applications |
| title_full_unstemmed | Multiphase Model for Predicting the Thermal Conductivity of Cement Paste and Its Applications |
| title_short | Multiphase Model for Predicting the Thermal Conductivity of Cement Paste and Its Applications |
| title_sort | multiphase model for predicting the thermal conductivity of cement paste and its applications |
| topic | cement paste thermal conductivity molecular dynamic method curing temperature |
| url | https://www.mdpi.com/1996-1944/14/16/4525 |
| work_keys_str_mv | AT yuanbodu multiphasemodelforpredictingthethermalconductivityofcementpasteanditsapplications AT yongge multiphasemodelforpredictingthethermalconductivityofcementpasteanditsapplications |