Characteristics and microscopic mechanisms of smoke emissions of OMMT/SBS-modified asphalt
Nanomaterials are increasingly being used in road engineering with the development of road construction technology. The smoke suppression performance of asphalt can be substantially improved using organic nano-montmorillonite (OMMT)/styrene–butadiene–styrene (SBS) block modifiers. Pyrolysis gas chro...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Environment International |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0160412024007785 |
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| author | Wanhong Yang Zhenghao Zhang Xiaolong Yang Xiaofan Jia Yixin Jiang |
| author_facet | Wanhong Yang Zhenghao Zhang Xiaolong Yang Xiaofan Jia Yixin Jiang |
| author_sort | Wanhong Yang |
| collection | DOAJ |
| description | Nanomaterials are increasingly being used in road engineering with the development of road construction technology. The smoke suppression performance of asphalt can be substantially improved using organic nano-montmorillonite (OMMT)/styrene–butadiene–styrene (SBS) block modifiers. Pyrolysis gas chromatography–mass spectrometry (PY-GC–MS), fluorescence microscopy (FM), thermogravimetric analysis (TG), and gel permeation chromatography (GPC) were used to explore the characteristics and microscopic mechanisms of flue gas emissions. The addition of OMMT effectively reduced the emissions of carbon dioxide and Volatile Organic Compounds (VOCs) in asphalt flue gas, as well as increased the SBS swelling degree in the asphalt matrix and the compatibility between the SBS and asphalt matrix. The stable interlayer structure formed via OMMT/SBS co-modification effectively inhibited the release of VOCs during the thermal decomposition of asphalt, being more environmentally friendly because of the reduction in emissions compared with traditional asphalt. The SBS, OMMT, and asphalt matrix is a physically modified mixture. The incorporation of OMMT increases the macromolecule content in the modified asphalt, showing that OMMT inhibited the decomposition of asphalt macromolecules into smaller molecules, thus reducing the release of VOCs. Including the appropriate macro and small molecules helps strengthen the ability of asphalt to resist permanent deformation at high temperatures, maintain its flexibility, and effectively prevent cracking at low temperatures. |
| format | Article |
| id | doaj-art-6deebd69263b45c8912c277643633b90 |
| institution | Kabale University |
| issn | 0160-4120 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Environment International |
| spelling | doaj-art-6deebd69263b45c8912c277643633b902025-01-24T04:44:00ZengElsevierEnvironment International0160-41202025-01-01195109192Characteristics and microscopic mechanisms of smoke emissions of OMMT/SBS-modified asphaltWanhong Yang0Zhenghao Zhang1Xiaolong Yang2Xiaofan Jia3Yixin Jiang4School of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China; Gansu Luqiao Shanjian Technology Co., Ltd., Lanzhou 730300, ChinaSchool of Civil Engineering and Architecture, Guangxi University, Nanning 530004, ChinaSchool of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China; Corresponding author.Gansu Luqiao Shanjian Technology Co., Ltd., Lanzhou 730300, ChinaSchool of Civil Engineering and Architecture, Guangxi University, Nanning 530004, ChinaNanomaterials are increasingly being used in road engineering with the development of road construction technology. The smoke suppression performance of asphalt can be substantially improved using organic nano-montmorillonite (OMMT)/styrene–butadiene–styrene (SBS) block modifiers. Pyrolysis gas chromatography–mass spectrometry (PY-GC–MS), fluorescence microscopy (FM), thermogravimetric analysis (TG), and gel permeation chromatography (GPC) were used to explore the characteristics and microscopic mechanisms of flue gas emissions. The addition of OMMT effectively reduced the emissions of carbon dioxide and Volatile Organic Compounds (VOCs) in asphalt flue gas, as well as increased the SBS swelling degree in the asphalt matrix and the compatibility between the SBS and asphalt matrix. The stable interlayer structure formed via OMMT/SBS co-modification effectively inhibited the release of VOCs during the thermal decomposition of asphalt, being more environmentally friendly because of the reduction in emissions compared with traditional asphalt. The SBS, OMMT, and asphalt matrix is a physically modified mixture. The incorporation of OMMT increases the macromolecule content in the modified asphalt, showing that OMMT inhibited the decomposition of asphalt macromolecules into smaller molecules, thus reducing the release of VOCs. Including the appropriate macro and small molecules helps strengthen the ability of asphalt to resist permanent deformation at high temperatures, maintain its flexibility, and effectively prevent cracking at low temperatures.http://www.sciencedirect.com/science/article/pii/S0160412024007785AsphaltOMMTSBSAsphalt smokeSmoke suppression mechanism |
| spellingShingle | Wanhong Yang Zhenghao Zhang Xiaolong Yang Xiaofan Jia Yixin Jiang Characteristics and microscopic mechanisms of smoke emissions of OMMT/SBS-modified asphalt Environment International Asphalt OMMT SBS Asphalt smoke Smoke suppression mechanism |
| title | Characteristics and microscopic mechanisms of smoke emissions of OMMT/SBS-modified asphalt |
| title_full | Characteristics and microscopic mechanisms of smoke emissions of OMMT/SBS-modified asphalt |
| title_fullStr | Characteristics and microscopic mechanisms of smoke emissions of OMMT/SBS-modified asphalt |
| title_full_unstemmed | Characteristics and microscopic mechanisms of smoke emissions of OMMT/SBS-modified asphalt |
| title_short | Characteristics and microscopic mechanisms of smoke emissions of OMMT/SBS-modified asphalt |
| title_sort | characteristics and microscopic mechanisms of smoke emissions of ommt sbs modified asphalt |
| topic | Asphalt OMMT SBS Asphalt smoke Smoke suppression mechanism |
| url | http://www.sciencedirect.com/science/article/pii/S0160412024007785 |
| work_keys_str_mv | AT wanhongyang characteristicsandmicroscopicmechanismsofsmokeemissionsofommtsbsmodifiedasphalt AT zhenghaozhang characteristicsandmicroscopicmechanismsofsmokeemissionsofommtsbsmodifiedasphalt AT xiaolongyang characteristicsandmicroscopicmechanismsofsmokeemissionsofommtsbsmodifiedasphalt AT xiaofanjia characteristicsandmicroscopicmechanismsofsmokeemissionsofommtsbsmodifiedasphalt AT yixinjiang characteristicsandmicroscopicmechanismsofsmokeemissionsofommtsbsmodifiedasphalt |