A Fundamental Study on an SAP Mixed Asphalt Mixture for Reducing the Urban Heat Island Effect
As the average temperature in summer rises and heat waves occur more frequently, the urban heat island (UHI) phenomenon is becoming a social problem. Asphalt road pavement stores heat during the day, raising the surface temperature, and releases the stored heat at night, thereby aggravating the UHI...
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MDPI AG
2024-12-01
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| author | Dae-Seong Jang Chi-Su Lim Kanghwi Lee Cheolmin Baek |
| author_facet | Dae-Seong Jang Chi-Su Lim Kanghwi Lee Cheolmin Baek |
| author_sort | Dae-Seong Jang |
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| description | As the average temperature in summer rises and heat waves occur more frequently, the urban heat island (UHI) phenomenon is becoming a social problem. Asphalt road pavement stores heat during the day, raising the surface temperature, and releases the stored heat at night, thereby aggravating the UHI phenomenon. Government authorities often spray water to lower the temperature of road pavement for the safety and convenience of citizens. However, the effect is immediate and does not last long. Therefore, in order to reduce the urban heat island phenomenon by spraying water, the recovery time of the surface temperature must be delayed. In this study, Super Absorbent Polymer (SAP), a highly absorbent polymer that absorbs 100 to 500 times its weight in water, was applied to asphalt road pavement. SAP is commonly used in diapers, feminine hygiene products, soil moisturizers, and concrete, and its scope is gradually expanding. The purpose of this study is to reduce the urban heat island phenomenon by mixing the SAP into asphalt and to increase the latent heat flux by evaporating the water absorbed by the SAP, thereby delaying the recovery time of the surface temperature of the road pavement. In this study, the performance of asphalt mixtures mixed with the SAP and the thermal characteristics according to the mixing amount were analyzed. In this study, the physical properties and temperature reduction performance of the asphalt mixture according to the SAP type and content were studied. The results of indoor and outdoor experiments on asphalt mixtures using the SAP showed that they satisfied the mechanical performance criteria as asphalt pavement materials and that the temperature recovery delay effect was improved. |
| format | Article |
| id | doaj-art-8428ccc3bd714cdd9968334da4e363d4 |
| institution | Kabale University |
| issn | 2076-3417 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj-art-8428ccc3bd714cdd9968334da4e363d42024-12-27T14:08:21ZengMDPI AGApplied Sciences2076-34172024-12-0114241178510.3390/app142411785A Fundamental Study on an SAP Mixed Asphalt Mixture for Reducing the Urban Heat Island EffectDae-Seong Jang0Chi-Su Lim1Kanghwi Lee2Cheolmin Baek3Department of Civil Engineering, Jeonbuk National University, Jeonju-si 54896, Republic of KoreaDepartment of Civil Engineering, Jeonbuk National University, Jeonju-si 54896, Republic of KoreaKorea Conformity Laboratories, Daejeon-si 34113, Republic of KoreaKorea Institute of Civil Engineering and Building Technology, Goyang-si 10223, Republic of KoreaAs the average temperature in summer rises and heat waves occur more frequently, the urban heat island (UHI) phenomenon is becoming a social problem. Asphalt road pavement stores heat during the day, raising the surface temperature, and releases the stored heat at night, thereby aggravating the UHI phenomenon. Government authorities often spray water to lower the temperature of road pavement for the safety and convenience of citizens. However, the effect is immediate and does not last long. Therefore, in order to reduce the urban heat island phenomenon by spraying water, the recovery time of the surface temperature must be delayed. In this study, Super Absorbent Polymer (SAP), a highly absorbent polymer that absorbs 100 to 500 times its weight in water, was applied to asphalt road pavement. SAP is commonly used in diapers, feminine hygiene products, soil moisturizers, and concrete, and its scope is gradually expanding. The purpose of this study is to reduce the urban heat island phenomenon by mixing the SAP into asphalt and to increase the latent heat flux by evaporating the water absorbed by the SAP, thereby delaying the recovery time of the surface temperature of the road pavement. In this study, the performance of asphalt mixtures mixed with the SAP and the thermal characteristics according to the mixing amount were analyzed. In this study, the physical properties and temperature reduction performance of the asphalt mixture according to the SAP type and content were studied. The results of indoor and outdoor experiments on asphalt mixtures using the SAP showed that they satisfied the mechanical performance criteria as asphalt pavement materials and that the temperature recovery delay effect was improved.https://www.mdpi.com/2076-3417/14/24/11785super absorbent polymer (SAP)urban heat island (UHI)thermal propertyasphalt mixtureheat island mitigation |
| spellingShingle | Dae-Seong Jang Chi-Su Lim Kanghwi Lee Cheolmin Baek A Fundamental Study on an SAP Mixed Asphalt Mixture for Reducing the Urban Heat Island Effect Applied Sciences super absorbent polymer (SAP) urban heat island (UHI) thermal property asphalt mixture heat island mitigation |
| title | A Fundamental Study on an SAP Mixed Asphalt Mixture for Reducing the Urban Heat Island Effect |
| title_full | A Fundamental Study on an SAP Mixed Asphalt Mixture for Reducing the Urban Heat Island Effect |
| title_fullStr | A Fundamental Study on an SAP Mixed Asphalt Mixture for Reducing the Urban Heat Island Effect |
| title_full_unstemmed | A Fundamental Study on an SAP Mixed Asphalt Mixture for Reducing the Urban Heat Island Effect |
| title_short | A Fundamental Study on an SAP Mixed Asphalt Mixture for Reducing the Urban Heat Island Effect |
| title_sort | fundamental study on an sap mixed asphalt mixture for reducing the urban heat island effect |
| topic | super absorbent polymer (SAP) urban heat island (UHI) thermal property asphalt mixture heat island mitigation |
| url | https://www.mdpi.com/2076-3417/14/24/11785 |
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