Heating Rate Effect on Gas Permeability and Pore Structure of Mortar under High Temperature
This experimental study investigated the effect of heating rate on mortar gas permeability and microstructure. The mortar was heated to three target temperatures (400 °C, 500 °C, and 600 °C) at three heating rates (5 °C/min,10 °C/min, and 15 °C/min). The variations of gas permeability and porosity w...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-09-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/15/19/6505 |
| _version_ | 1797478516818706432 |
|---|---|
| author | Wei Chen Yuehan Liu Mingquan Sheng Hejun Zhang Yue Liang Frederic Skoczylas |
| author_facet | Wei Chen Yuehan Liu Mingquan Sheng Hejun Zhang Yue Liang Frederic Skoczylas |
| author_sort | Wei Chen |
| collection | DOAJ |
| description | This experimental study investigated the effect of heating rate on mortar gas permeability and microstructure. The mortar was heated to three target temperatures (400 °C, 500 °C, and 600 °C) at three heating rates (5 °C/min,10 °C/min, and 15 °C/min). The variations of gas permeability and porosity were measured simultaneously at different confining pressures, and the changes in mortar microstructure were analyzed by NMR and SEM techniques. The results show that the porosity and gas permeability increase with an increase in temperature and heating rate. The gas permeability and porosity continue to decrease as confinement is increased due to a reduction in the pore volume. The microstructure observed by SEM indicates that the high heating rate induces some microcracks at 500 °C and 600 °C. The fractal dimension based on NMR can quantitatively characterize the complexity of the mortar pore structure and shows a quadratic decreasing relationship with gas permeability and porosity. |
| first_indexed | 2024-03-09T21:32:57Z |
| format | Article |
| id | doaj.art-fa723c8e2fd940fd8c7d37271d169bc0 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T21:32:57Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-fa723c8e2fd940fd8c7d37271d169bc02023-11-23T20:51:59ZengMDPI AGMaterials1996-19442022-09-011519650510.3390/ma15196505Heating Rate Effect on Gas Permeability and Pore Structure of Mortar under High TemperatureWei Chen0Yuehan Liu1Mingquan Sheng2Hejun Zhang3Yue Liang4Frederic Skoczylas5School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430068, ChinaSchool of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430068, ChinaSchool of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430068, ChinaSchool of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430068, ChinaSchool of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430068, ChinaCNRS (Centre National de la Recherche Scientifique), Centrale Lille, UMR9013—LaMcube—Laboratoire de Mécanique Multiphysique et Multiéchelle, Université de Lille, F-59000 Lille, FranceThis experimental study investigated the effect of heating rate on mortar gas permeability and microstructure. The mortar was heated to three target temperatures (400 °C, 500 °C, and 600 °C) at three heating rates (5 °C/min,10 °C/min, and 15 °C/min). The variations of gas permeability and porosity were measured simultaneously at different confining pressures, and the changes in mortar microstructure were analyzed by NMR and SEM techniques. The results show that the porosity and gas permeability increase with an increase in temperature and heating rate. The gas permeability and porosity continue to decrease as confinement is increased due to a reduction in the pore volume. The microstructure observed by SEM indicates that the high heating rate induces some microcracks at 500 °C and 600 °C. The fractal dimension based on NMR can quantitatively characterize the complexity of the mortar pore structure and shows a quadratic decreasing relationship with gas permeability and porosity.https://www.mdpi.com/1996-1944/15/19/6505heating rateporositygas permeabilitymicrostructure |
| spellingShingle | Wei Chen Yuehan Liu Mingquan Sheng Hejun Zhang Yue Liang Frederic Skoczylas Heating Rate Effect on Gas Permeability and Pore Structure of Mortar under High Temperature Materials heating rate porosity gas permeability microstructure |
| title | Heating Rate Effect on Gas Permeability and Pore Structure of Mortar under High Temperature |
| title_full | Heating Rate Effect on Gas Permeability and Pore Structure of Mortar under High Temperature |
| title_fullStr | Heating Rate Effect on Gas Permeability and Pore Structure of Mortar under High Temperature |
| title_full_unstemmed | Heating Rate Effect on Gas Permeability and Pore Structure of Mortar under High Temperature |
| title_short | Heating Rate Effect on Gas Permeability and Pore Structure of Mortar under High Temperature |
| title_sort | heating rate effect on gas permeability and pore structure of mortar under high temperature |
| topic | heating rate porosity gas permeability microstructure |
| url | https://www.mdpi.com/1996-1944/15/19/6505 |
| work_keys_str_mv | AT weichen heatingrateeffectongaspermeabilityandporestructureofmortarunderhightemperature AT yuehanliu heatingrateeffectongaspermeabilityandporestructureofmortarunderhightemperature AT mingquansheng heatingrateeffectongaspermeabilityandporestructureofmortarunderhightemperature AT hejunzhang heatingrateeffectongaspermeabilityandporestructureofmortarunderhightemperature AT yueliang heatingrateeffectongaspermeabilityandporestructureofmortarunderhightemperature AT fredericskoczylas heatingrateeffectongaspermeabilityandporestructureofmortarunderhightemperature |