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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)...

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Autores principales: Dai, Ming, Wang, Shiwan, Deng, Jianbo, Gao, Zhijie, Liu, Zhiyun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
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%).
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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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