Evaluating the effective thermal conductivity of cement mortar through x-ray scanning
The effective thermal conductivity of cement mortar as a porous material depends on its solid phase and void phase conductivity. Therefore, a sample's pore distribution can highly impact the value of effective thermal conductivity. For this reason, an x-ray CT scanner was applied to detect air-...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-01-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X22009236 |
| _version_ | 1797956157810147328 |
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| author | Iman Asadi Guomin Ji Mohammad Hajmohammadian Baghban |
| author_facet | Iman Asadi Guomin Ji Mohammad Hajmohammadian Baghban |
| author_sort | Iman Asadi |
| collection | DOAJ |
| description | The effective thermal conductivity of cement mortar as a porous material depends on its solid phase and void phase conductivity. Therefore, a sample's pore distribution can highly impact the value of effective thermal conductivity. For this reason, an x-ray CT scanner was applied to detect air-void content in mortars with different mix proportions. After 28 days of curing, the thermal conductivity of samples (40 × 40 × 80 mm3) was measured by the transient plane source (TPS) apparatus, TPS2500. Then, the samples were scanned by a Zeiss Metrotom 1500 CT scanner to detect the macro pore content. Finally, the VGStudio Max 3.0 software was applied to observe the voids and simulate the effective thermal conductivity. The results showed that the total macro void contents (in this study, voids bigger than 52 μm) were increased up to 15% and 33% for samples with the cement the sand ratio of 1:3 and 1:4 compared to the sample with the c:s ratio of 1:2. However, the results indicated that the void fraction is not uniform. Therefore, effective thermal conductivity can vary in different sample locations. The finding shows that x-ray scanning and image analysis is the proper method to precisely determine the effective thermal conductivity of cement-based materials. |
| first_indexed | 2024-04-10T23:45:38Z |
| format | Article |
| id | doaj.art-334638019f324ba598003cc9b06fd726 |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-04-10T23:45:38Z |
| publishDate | 2023-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-334638019f324ba598003cc9b06fd7262023-01-11T04:29:27ZengElsevierCase Studies in Thermal Engineering2214-157X2023-01-0141102686Evaluating the effective thermal conductivity of cement mortar through x-ray scanningIman Asadi0Guomin Ji1Mohammad Hajmohammadian Baghban2Department of Structural Engineering, Norwegian University of Science and Technology, NO-7491, Trondheim, NorwayDepartment of Manufacturing and Civil Engineering, Norwegian University of Science and Technology, Gjøvik, Norway; Corresponding author.Department of Manufacturing and Civil Engineering, Norwegian University of Science and Technology, Gjøvik, Norway; Corresponding author.The effective thermal conductivity of cement mortar as a porous material depends on its solid phase and void phase conductivity. Therefore, a sample's pore distribution can highly impact the value of effective thermal conductivity. For this reason, an x-ray CT scanner was applied to detect air-void content in mortars with different mix proportions. After 28 days of curing, the thermal conductivity of samples (40 × 40 × 80 mm3) was measured by the transient plane source (TPS) apparatus, TPS2500. Then, the samples were scanned by a Zeiss Metrotom 1500 CT scanner to detect the macro pore content. Finally, the VGStudio Max 3.0 software was applied to observe the voids and simulate the effective thermal conductivity. The results showed that the total macro void contents (in this study, voids bigger than 52 μm) were increased up to 15% and 33% for samples with the cement the sand ratio of 1:3 and 1:4 compared to the sample with the c:s ratio of 1:2. However, the results indicated that the void fraction is not uniform. Therefore, effective thermal conductivity can vary in different sample locations. The finding shows that x-ray scanning and image analysis is the proper method to precisely determine the effective thermal conductivity of cement-based materials.http://www.sciencedirect.com/science/article/pii/S2214157X22009236Cement mortarCT scannerEffective thermal conductivityPorosity |
| spellingShingle | Iman Asadi Guomin Ji Mohammad Hajmohammadian Baghban Evaluating the effective thermal conductivity of cement mortar through x-ray scanning Case Studies in Thermal Engineering Cement mortar CT scanner Effective thermal conductivity Porosity |
| title | Evaluating the effective thermal conductivity of cement mortar through x-ray scanning |
| title_full | Evaluating the effective thermal conductivity of cement mortar through x-ray scanning |
| title_fullStr | Evaluating the effective thermal conductivity of cement mortar through x-ray scanning |
| title_full_unstemmed | Evaluating the effective thermal conductivity of cement mortar through x-ray scanning |
| title_short | Evaluating the effective thermal conductivity of cement mortar through x-ray scanning |
| title_sort | evaluating the effective thermal conductivity of cement mortar through x ray scanning |
| topic | Cement mortar CT scanner Effective thermal conductivity Porosity |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X22009236 |
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