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Study on the Cooling Effect of Asphalt Pavement Blended with Composite Phase Change Materials
To explore the cooling effect of phase change materials (PCM) on asphalt pavement, a numerical model of the coupled heat transfer process of a typical monolithic subgrade of the G7 Expressway in the eastern Tianshan mountain area was developed. Three types of paraffin materials (OP55E, OP52E, OP47E)...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9100766/ https://www.ncbi.nlm.nih.gov/pubmed/35591542 http://dx.doi.org/10.3390/ma15093208 |
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author | Dai, Ming Wang, Shiwan Deng, Jianbo Gao, Zhijie Liu, Zhiyun |
author_facet | Dai, Ming Wang, Shiwan Deng, Jianbo Gao, Zhijie Liu, Zhiyun |
author_sort | Dai, Ming |
collection | PubMed |
description | To explore the cooling effect of phase change materials (PCM) on asphalt pavement, a numerical model of the coupled heat transfer process of a typical monolithic subgrade of the G7 Expressway in the eastern Tianshan mountain area was developed. Three types of paraffin materials (OP55E, OP52E, OP47E) were mixed in a 4:3:3 volume ratio and blended into the asphalt upper layer and overall asphalt layer at volume ratios of 5%, 10%, 15% and 20%. The cooling effect of different PCM addition schemes was simulated and analyzed, and the frequency and duration of asphalt pavement high temperature operation status were also measured. The results showed that: (1) Th addition of PCM in the asphalt layer can effectively reduce the frequency of pavement high temperature rutting damage. The number of days and average daily duration of high temperature on the road surface were both reduced. (2) The cooling effect was positively correlated with the PCM volume mixing ratio, and the temperature drop of the pavement also increased with the increase of the PCM blending ratio. As the PCM mixing ratio increased from 5% to 20%, the initial 75 °C pavement cooled by 1.49 °C and 4.66 °C, respectively, and the number of days and hours of pavement temperature over 70 °C decreased to 4 days and 3.3 h, respectively. (3) The cooling effect of the asphalt upper layer PCM scheme was greater at a small mixing ratio (5%), whereas the performance of the overall asphalt layer PCM blended scheme was effectively promoted by increasing the equivalent heat capacity of system under the large mixing ratio (20%). |
format | Online Article Text |
id | pubmed-9100766 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-91007662022-05-14 Study on the Cooling Effect of Asphalt Pavement Blended with Composite Phase Change Materials Dai, Ming Wang, Shiwan Deng, Jianbo Gao, Zhijie Liu, Zhiyun Materials (Basel) Article To explore the cooling effect of phase change materials (PCM) on asphalt pavement, a numerical model of the coupled heat transfer process of a typical monolithic subgrade of the G7 Expressway in the eastern Tianshan mountain area was developed. Three types of paraffin materials (OP55E, OP52E, OP47E) were mixed in a 4:3:3 volume ratio and blended into the asphalt upper layer and overall asphalt layer at volume ratios of 5%, 10%, 15% and 20%. The cooling effect of different PCM addition schemes was simulated and analyzed, and the frequency and duration of asphalt pavement high temperature operation status were also measured. The results showed that: (1) Th addition of PCM in the asphalt layer can effectively reduce the frequency of pavement high temperature rutting damage. The number of days and average daily duration of high temperature on the road surface were both reduced. (2) The cooling effect was positively correlated with the PCM volume mixing ratio, and the temperature drop of the pavement also increased with the increase of the PCM blending ratio. As the PCM mixing ratio increased from 5% to 20%, the initial 75 °C pavement cooled by 1.49 °C and 4.66 °C, respectively, and the number of days and hours of pavement temperature over 70 °C decreased to 4 days and 3.3 h, respectively. (3) The cooling effect of the asphalt upper layer PCM scheme was greater at a small mixing ratio (5%), whereas the performance of the overall asphalt layer PCM blended scheme was effectively promoted by increasing the equivalent heat capacity of system under the large mixing ratio (20%). MDPI 2022-04-29 /pmc/articles/PMC9100766/ /pubmed/35591542 http://dx.doi.org/10.3390/ma15093208 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Dai, Ming Wang, Shiwan Deng, Jianbo Gao, Zhijie Liu, Zhiyun Study on the Cooling Effect of Asphalt Pavement Blended with Composite Phase Change Materials |
title | Study on the Cooling Effect of Asphalt Pavement Blended with Composite Phase Change Materials |
title_full | Study on the Cooling Effect of Asphalt Pavement Blended with Composite Phase Change Materials |
title_fullStr | Study on the Cooling Effect of Asphalt Pavement Blended with Composite Phase Change Materials |
title_full_unstemmed | Study on the Cooling Effect of Asphalt Pavement Blended with Composite Phase Change Materials |
title_short | Study on the Cooling Effect of Asphalt Pavement Blended with Composite Phase Change Materials |
title_sort | study on the cooling effect of asphalt pavement blended with composite phase change materials |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9100766/ https://www.ncbi.nlm.nih.gov/pubmed/35591542 http://dx.doi.org/10.3390/ma15093208 |
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