Mesoscopic Finite Element Method of the Effective Thermal Conductivity of Concrete with Arbitrary Gradation
The effective thermal conductivity (ETC) of concrete is the most important parameter in determining the temperature field and thermal stresses. A 2D random polygonal aggregate model and its modified model considering porosity were established in this paper in order to partially replace the experimen...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2018-01-01
|
| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/2352864 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832553397575745536 |
|---|---|
| author | Pingming Huang Yu Zhao Yanwei Niu Xiang Ren Mingfeng Chang Yamin Sun |
| author_facet | Pingming Huang Yu Zhao Yanwei Niu Xiang Ren Mingfeng Chang Yamin Sun |
| author_sort | Pingming Huang |
| collection | DOAJ |
| description | The effective thermal conductivity (ETC) of concrete is the most important parameter in determining the temperature field and thermal stresses. A 2D random polygonal aggregate model and its modified model considering porosity were established in this paper in order to partially replace the experiment for parametric analysis on the ETC of concrete and to save the experiment cost. A mesoscopic finite element method for the ETC of concrete with arbitrary gradation was also proposed. In addition, the influence factors (thermal conductivity of coarse aggregate, cement mortar, and volume fraction of coarse aggregate) of the effective thermal conductivity of concrete were analyzed. The results show that the 2D gradation curve of coarse aggregates is proved to exist, and there is a corresponding relationship between the 2D and 3D gradation curves of coarse aggregates. The effective thermal conductivity of concrete has a positive exponential relationship with the volume fraction of coarse aggregates, a positive logarithm relationship with the thermal conductivity of coarse aggregates, and a positive linear correlation with the thermal conductivity of cement mortar. The most practical way to improve the effective thermal conductivity of concrete is to increase the ETC of the cement mortar, but the most effective way is to replace the aggregate with a material with a high thermal conductivity. |
| format | Article |
| id | doaj-art-6041dfb0f222472d868786cd357b292d |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-6041dfb0f222472d868786cd357b292d2025-02-03T05:54:07ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422018-01-01201810.1155/2018/23528642352864Mesoscopic Finite Element Method of the Effective Thermal Conductivity of Concrete with Arbitrary GradationPingming Huang0Yu Zhao1Yanwei Niu2Xiang Ren3Mingfeng Chang4Yamin Sun5School of Highway, Changan University, Xian 710064, ChinaSchool of Highway, Changan University, Xian 710064, ChinaSchool of Highway, Changan University, Xian 710064, ChinaSchool of Architecture and Civil Engineering, Xian University of Science and Technology, Xian 710064, ChinaSchool of Materials Science and Engineering, Changan University, Xian 710064, ChinaSchool of Highway, Changan University, Xian 710064, ChinaThe effective thermal conductivity (ETC) of concrete is the most important parameter in determining the temperature field and thermal stresses. A 2D random polygonal aggregate model and its modified model considering porosity were established in this paper in order to partially replace the experiment for parametric analysis on the ETC of concrete and to save the experiment cost. A mesoscopic finite element method for the ETC of concrete with arbitrary gradation was also proposed. In addition, the influence factors (thermal conductivity of coarse aggregate, cement mortar, and volume fraction of coarse aggregate) of the effective thermal conductivity of concrete were analyzed. The results show that the 2D gradation curve of coarse aggregates is proved to exist, and there is a corresponding relationship between the 2D and 3D gradation curves of coarse aggregates. The effective thermal conductivity of concrete has a positive exponential relationship with the volume fraction of coarse aggregates, a positive logarithm relationship with the thermal conductivity of coarse aggregates, and a positive linear correlation with the thermal conductivity of cement mortar. The most practical way to improve the effective thermal conductivity of concrete is to increase the ETC of the cement mortar, but the most effective way is to replace the aggregate with a material with a high thermal conductivity.http://dx.doi.org/10.1155/2018/2352864 |
| spellingShingle | Pingming Huang Yu Zhao Yanwei Niu Xiang Ren Mingfeng Chang Yamin Sun Mesoscopic Finite Element Method of the Effective Thermal Conductivity of Concrete with Arbitrary Gradation Advances in Materials Science and Engineering |
| title | Mesoscopic Finite Element Method of the Effective Thermal Conductivity of Concrete with Arbitrary Gradation |
| title_full | Mesoscopic Finite Element Method of the Effective Thermal Conductivity of Concrete with Arbitrary Gradation |
| title_fullStr | Mesoscopic Finite Element Method of the Effective Thermal Conductivity of Concrete with Arbitrary Gradation |
| title_full_unstemmed | Mesoscopic Finite Element Method of the Effective Thermal Conductivity of Concrete with Arbitrary Gradation |
| title_short | Mesoscopic Finite Element Method of the Effective Thermal Conductivity of Concrete with Arbitrary Gradation |
| title_sort | mesoscopic finite element method of the effective thermal conductivity of concrete with arbitrary gradation |
| url | http://dx.doi.org/10.1155/2018/2352864 |
| work_keys_str_mv | AT pingminghuang mesoscopicfiniteelementmethodoftheeffectivethermalconductivityofconcretewitharbitrarygradation AT yuzhao mesoscopicfiniteelementmethodoftheeffectivethermalconductivityofconcretewitharbitrarygradation AT yanweiniu mesoscopicfiniteelementmethodoftheeffectivethermalconductivityofconcretewitharbitrarygradation AT xiangren mesoscopicfiniteelementmethodoftheeffectivethermalconductivityofconcretewitharbitrarygradation AT mingfengchang mesoscopicfiniteelementmethodoftheeffectivethermalconductivityofconcretewitharbitrarygradation AT yaminsun mesoscopicfiniteelementmethodoftheeffectivethermalconductivityofconcretewitharbitrarygradation |