Combined experimental and theoretical investigation of pore characteristics effect on thermal conductivity of light-weight aggregate concrete including microencapsulated PCM
Pore characteristics of concrete material have a significant impact on its thermal conductivity, however, very little pays attention to the impact of pore characteristics on thermal conductivity of light-weight aggregate concrete including microencapsulated phase change materials (MPCM-LWAC). In thi...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-09-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423017532 |
| _version_ | 1797646751372410880 |
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| author | Lin Zhu Weihua Ding Faning Dang Guochen Sang Yi Xue Qiaoyu Wang |
| author_facet | Lin Zhu Weihua Ding Faning Dang Guochen Sang Yi Xue Qiaoyu Wang |
| author_sort | Lin Zhu |
| collection | DOAJ |
| description | Pore characteristics of concrete material have a significant impact on its thermal conductivity, however, very little pays attention to the impact of pore characteristics on thermal conductivity of light-weight aggregate concrete including microencapsulated phase change materials (MPCM-LWAC). In this paper, the experimental investigation was carried out to reveal the thermal conductivity and pore characteristics of LWAC including different MPCM dosage. The quantitative analysis on pore characteristic parameters (Porosity, Flatness, Spherical degree) that were extracted based on stereology theory has proved a clear relationship of pore characteristics in regard to MPCM dosage. On the basis of experimental investigation, the theoretical investigation was performed to establish the theoretical model suitable for the effective thermal conductivity (ETC) of MPCM-LWAC. To consider the impact of pore characteristics on ETC of MPCM-LWAC, two-step method was proposed to improve the common theoretical model. Results shown that the addition of MPCM caused the increasing of porosity of MPCM-LWAC, while little impact on the Flatness and Spherical degree. Regardless of the MPCM dosage embedded into LWAC, the data sets of Flatness and Spherical degree follow the Lognormal Distribution and Normal distribution respectively. The position parameter of Normal distribution was determined as the shape factor in improved H–C model by using retrograde method. The ETC of MPCM-LWAC getting from the improved H–C model were in better agreement with the experimental results. Hence, the improved H–C model was recommended as the theoretical model to predict the ETC of MPCM-LWAC. |
| first_indexed | 2024-03-11T15:07:16Z |
| format | Article |
| id | doaj.art-e306b535d41c439fb3beb3aca0dc16fc |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-11T15:07:16Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-e306b535d41c439fb3beb3aca0dc16fc2023-10-30T06:02:50ZengElsevierJournal of Materials Research and Technology2238-78542023-09-0126587602Combined experimental and theoretical investigation of pore characteristics effect on thermal conductivity of light-weight aggregate concrete including microencapsulated PCMLin Zhu0Weihua Ding1Faning Dang2Guochen Sang3Yi Xue4Qiaoyu Wang5State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, China; School of Civil Engineering and Architecture, Xi'an University of Technology, Xi'an 710048, China; Shaanxi Key Laboratory of Loess Mechanics and Engineering, Xi'an University of Technology, Xi'an 710048, ChinaState Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, China; School of Civil Engineering and Architecture, Xi'an University of Technology, Xi'an 710048, China; Shaanxi Key Laboratory of Loess Mechanics and Engineering, Xi'an University of Technology, Xi'an 710048, China; Corresponding author. State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, China.State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, China; School of Civil Engineering and Architecture, Xi'an University of Technology, Xi'an 710048, China; Shaanxi Key Laboratory of Loess Mechanics and Engineering, Xi'an University of Technology, Xi'an 710048, China; Corresponding author. State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, China.State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, China; School of Civil Engineering and Architecture, Xi'an University of Technology, Xi'an 710048, China; Shaanxi Key Laboratory of Loess Mechanics and Engineering, Xi'an University of Technology, Xi'an 710048, ChinaState Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, China; School of Civil Engineering and Architecture, Xi'an University of Technology, Xi'an 710048, China; Shaanxi Key Laboratory of Loess Mechanics and Engineering, Xi'an University of Technology, Xi'an 710048, ChinaState Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, China; School of Civil Engineering and Architecture, Xi'an University of Technology, Xi'an 710048, China; Shaanxi Key Laboratory of Loess Mechanics and Engineering, Xi'an University of Technology, Xi'an 710048, ChinaPore characteristics of concrete material have a significant impact on its thermal conductivity, however, very little pays attention to the impact of pore characteristics on thermal conductivity of light-weight aggregate concrete including microencapsulated phase change materials (MPCM-LWAC). In this paper, the experimental investigation was carried out to reveal the thermal conductivity and pore characteristics of LWAC including different MPCM dosage. The quantitative analysis on pore characteristic parameters (Porosity, Flatness, Spherical degree) that were extracted based on stereology theory has proved a clear relationship of pore characteristics in regard to MPCM dosage. On the basis of experimental investigation, the theoretical investigation was performed to establish the theoretical model suitable for the effective thermal conductivity (ETC) of MPCM-LWAC. To consider the impact of pore characteristics on ETC of MPCM-LWAC, two-step method was proposed to improve the common theoretical model. Results shown that the addition of MPCM caused the increasing of porosity of MPCM-LWAC, while little impact on the Flatness and Spherical degree. Regardless of the MPCM dosage embedded into LWAC, the data sets of Flatness and Spherical degree follow the Lognormal Distribution and Normal distribution respectively. The position parameter of Normal distribution was determined as the shape factor in improved H–C model by using retrograde method. The ETC of MPCM-LWAC getting from the improved H–C model were in better agreement with the experimental results. Hence, the improved H–C model was recommended as the theoretical model to predict the ETC of MPCM-LWAC.http://www.sciencedirect.com/science/article/pii/S2238785423017532MPCM-LWACPore characteristicsETCTwo-step methodTheoretical model |
| spellingShingle | Lin Zhu Weihua Ding Faning Dang Guochen Sang Yi Xue Qiaoyu Wang Combined experimental and theoretical investigation of pore characteristics effect on thermal conductivity of light-weight aggregate concrete including microencapsulated PCM Journal of Materials Research and Technology MPCM-LWAC Pore characteristics ETC Two-step method Theoretical model |
| title | Combined experimental and theoretical investigation of pore characteristics effect on thermal conductivity of light-weight aggregate concrete including microencapsulated PCM |
| title_full | Combined experimental and theoretical investigation of pore characteristics effect on thermal conductivity of light-weight aggregate concrete including microencapsulated PCM |
| title_fullStr | Combined experimental and theoretical investigation of pore characteristics effect on thermal conductivity of light-weight aggregate concrete including microencapsulated PCM |
| title_full_unstemmed | Combined experimental and theoretical investigation of pore characteristics effect on thermal conductivity of light-weight aggregate concrete including microencapsulated PCM |
| title_short | Combined experimental and theoretical investigation of pore characteristics effect on thermal conductivity of light-weight aggregate concrete including microencapsulated PCM |
| title_sort | combined experimental and theoretical investigation of pore characteristics effect on thermal conductivity of light weight aggregate concrete including microencapsulated pcm |
| topic | MPCM-LWAC Pore characteristics ETC Two-step method Theoretical model |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423017532 |
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