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Mesoscopic Finite Element Method of the Effective Thermal Conductivity of Concrete with Arbitrary Gradation
Joint Authors
Chang, Mingfeng
Huang, Pingming
Zhao, Yu
Niu, Yanwei
Ren, Xiang
Sun, Yamin
Source
Advances in Materials Science and Engineering
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-12-27
Country of Publication
Egypt
No. of Pages
11
Abstract EN
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.
American Psychological Association (APA)
Huang, Pingming& Zhao, Yu& Niu, Yanwei& Ren, Xiang& Chang, Mingfeng& Sun, Yamin. 2018. Mesoscopic Finite Element Method of the Effective Thermal Conductivity of Concrete with Arbitrary Gradation. Advances in Materials Science and Engineering،Vol. 2018, no. 2018, pp.1-11.
https://search.emarefa.net/detail/BIM-1120022
Modern Language Association (MLA)
Huang, Pingming…[et al.]. Mesoscopic Finite Element Method of the Effective Thermal Conductivity of Concrete with Arbitrary Gradation. Advances in Materials Science and Engineering No. 2018 (2018), pp.1-11.
https://search.emarefa.net/detail/BIM-1120022
American Medical Association (AMA)
Huang, Pingming& Zhao, Yu& Niu, Yanwei& Ren, Xiang& Chang, Mingfeng& Sun, Yamin. Mesoscopic Finite Element Method of the Effective Thermal Conductivity of Concrete with Arbitrary Gradation. Advances in Materials Science and Engineering. 2018. Vol. 2018, no. 2018, pp.1-11.
https://search.emarefa.net/detail/BIM-1120022
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1120022