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A platform for research: civil engineering, architecture and urbanism
Analysis of the Micromorphology and Molecular Weight of Modified Asphalt
https://orcid.org/http://orcid.org/0000-0002-5536-9660
To study the influence of the micromorphology and structure of modified asphalt on pavement performance under combined action of multiple modifiers, styrene–butadiene–styrene, styrene–butadiene–rubber, stabilizer and furfural extract oil were selected to modify the matrix asphalt, and short-term aging experiments were carried out. The cross-linking and distribution of the modifiers were analyzed by fluorescence microscopy, the micromorphology of the modified asphalt before and after short-term aging was analyzed by scanning electron microscopy, and the change in molecular weight of the modifier and asphalt phase was analyzed by gel permeation chromatography. The results showed that the content of saturated and aromatic of Panjin asphalt was more than 65%, and the content of aromatic was more than 33%, which was suitable for simultaneous modification of multiple modifiers with good modification effect. After the stabilizer and the compatibilizer were added, the interface adsorption layer between the modifier particle and the asphalt phase was stable under the action of the active free radicals. The surface morphology of the matrix asphalt changed greatly after aging. The modifier did not further aggravate the folds on the surface of the asphalt after aging, but the aging process was accompanied by the decomposition of modifier macromolecules and the aggregation of small molecules. In the aging process of the composite modifiers, the degradation of macromolecules was the main molecular reaction, while the polymerization reaction was the main reaction of asphalt phase. The conclusions could provide theoretical and technical support for the development and application of high-performance modified asphalt.
Analysis of the Micromorphology and Molecular Weight of Modified Asphalt
https://orcid.org/http://orcid.org/0000-0002-5536-9660
To study the influence of the micromorphology and structure of modified asphalt on pavement performance under combined action of multiple modifiers, styrene–butadiene–styrene, styrene–butadiene–rubber, stabilizer and furfural extract oil were selected to modify the matrix asphalt, and short-term aging experiments were carried out. The cross-linking and distribution of the modifiers were analyzed by fluorescence microscopy, the micromorphology of the modified asphalt before and after short-term aging was analyzed by scanning electron microscopy, and the change in molecular weight of the modifier and asphalt phase was analyzed by gel permeation chromatography. The results showed that the content of saturated and aromatic of Panjin asphalt was more than 65%, and the content of aromatic was more than 33%, which was suitable for simultaneous modification of multiple modifiers with good modification effect. After the stabilizer and the compatibilizer were added, the interface adsorption layer between the modifier particle and the asphalt phase was stable under the action of the active free radicals. The surface morphology of the matrix asphalt changed greatly after aging. The modifier did not further aggravate the folds on the surface of the asphalt after aging, but the aging process was accompanied by the decomposition of modifier macromolecules and the aggregation of small molecules. In the aging process of the composite modifiers, the degradation of macromolecules was the main molecular reaction, while the polymerization reaction was the main reaction of asphalt phase. The conclusions could provide theoretical and technical support for the development and application of high-performance modified asphalt.
Analysis of the Micromorphology and Molecular Weight of Modified Asphalt
https://orcid.org/http://orcid.org/0000-0002-5536-9660
To study the influence of the micromorphology and structure of modified asphalt on pavement performance under combined action of multiple modifiers, styrene–butadiene–styrene, styrene–butadiene–rubber, stabilizer and furfural extract oil were selected to modify the matrix asphalt, and short-term aging experiments were carried out. The cross-linking and distribution of the modifiers were analyzed by fluorescence microscopy, the micromorphology of the modified asphalt before and after short-term aging was analyzed by scanning electron microscopy, and the change in molecular weight of the modifier and asphalt phase was analyzed by gel permeation chromatography. The results showed that the content of saturated and aromatic of Panjin asphalt was more than 65%, and the content of aromatic was more than 33%, which was suitable for simultaneous modification of multiple modifiers with good modification effect. After the stabilizer and the compatibilizer were added, the interface adsorption layer between the modifier particle and the asphalt phase was stable under the action of the active free radicals. The surface morphology of the matrix asphalt changed greatly after aging. The modifier did not further aggravate the folds on the surface of the asphalt after aging, but the aging process was accompanied by the decomposition of modifier macromolecules and the aggregation of small molecules. In the aging process of the composite modifiers, the degradation of macromolecules was the main molecular reaction, while the polymerization reaction was the main reaction of asphalt phase. The conclusions could provide theoretical and technical support for the development and application of high-performance modified asphalt.
Analysis of the Micromorphology and Molecular Weight of Modified Asphalt
Int. J. Pavement Res. Technol.
Zhou, Yan (author) / Liu, Xiaolan (author) / Zhang, Kai (author) / Ren, Quanchang (author) / Ma, Yan (author) / Xu, Peng (author)
International Journal of Pavement Research and Technology ; 15 ; 1509-1522
2022-11-01
14 pages
Article (Journal)
Electronic Resource
English
Micromorphology and microrheology of modified bitumen by atomic force microscopy
| Taylor & Francis Verlag | 2014
Micromorphology and microrheology of modified bitumen by atomic force microscopy
| British Library Online Contents | 2014