Investigating the rheological properties and microstructural analysis of Nano-expanded Perlite modified asphalt binder
The utilization of additives to improve the properties of asphalt binders has attracted considerable attention in recent years. This study aims to improve asphalt binder performance and damage resistance in asphalt pavements by incorporating Nano-Expanded Perlite (NEP) as a modifier. Asphalt binders...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-07-01
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| Series: | Case Studies in Construction Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509525000075 |
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| author | Saeid Hesami Mohammad Mahzari Saeid Sobhi Mohammad Ali Bay |
| author_facet | Saeid Hesami Mohammad Mahzari Saeid Sobhi Mohammad Ali Bay |
| author_sort | Saeid Hesami |
| collection | DOAJ |
| description | The utilization of additives to improve the properties of asphalt binders has attracted considerable attention in recent years. This study aims to improve asphalt binder performance and damage resistance in asphalt pavements by incorporating Nano-Expanded Perlite (NEP) as a modifier. Asphalt binders were modified with varying percentages of NEP (0 %, 2 %, 4 %, and 6 %) and characterized using conventional and performance tests [i.e., rotational viscosity (RV), dynamic shear rheometer (DSR), bending beam rheometer (BBR)] to evaluate their rheological properties. Microstructural analyses, including X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDS), and Fourier-transform infrared spectroscopy (FTIR), were also conducted. The findings revealed adding up to 6 % NEP increased the softening point, complex modulus (G*), and viscosity while decreasing penetration grade, phase angle (δ), and ductility of the modified asphalt binder. NEP improved the high-temperature performance grade by one grade and enhanced rutting resistance without adversely affecting the low-temperature cracking resistance. Furthermore, NEP-modified binder demonstrated good performance at intermediate and low temperatures despite increased binder stiffness. The microstructural analyses indicated uniform dispersion of NEP elements on the modified binder surface, and the Si element from the Perlite nanoparticles exhibited the highest proportion in the modified asphalt binder, acting as fillers within the binder matrix. Overall, these characteristics of Perlite enabled it to enhance the rheological properties and performance of the asphalt binder, acting as an effective modifier when incorporated into the binder and displaying favorable performance at various temperature conditions. |
| format | Article |
| id | doaj-art-5bba62e61af54fbb822d3be3ae6f5137 |
| institution | Kabale University |
| issn | 2214-5095 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj-art-5bba62e61af54fbb822d3be3ae6f51372025-01-07T04:17:26ZengElsevierCase Studies in Construction Materials2214-50952025-07-0122e04208Investigating the rheological properties and microstructural analysis of Nano-expanded Perlite modified asphalt binderSaeid Hesami0Mohammad Mahzari1Saeid Sobhi2Mohammad Ali Bay3Department of Civil Engineering, Babol Noshirvani University of Technology, Babol, Iran; Corresponding author.Department of Civil Engineering, Babol Noshirvani University of Technology, Babol, IranDepartment of Civil Engineering, Babol Noshirvani University of Technology, Babol, IranDepartment of Wood and Paper Science and Technology, Faculty of Natural Resurces and Environment, Science and Research Branch, Islamic Azad University, Tehran, IranThe utilization of additives to improve the properties of asphalt binders has attracted considerable attention in recent years. This study aims to improve asphalt binder performance and damage resistance in asphalt pavements by incorporating Nano-Expanded Perlite (NEP) as a modifier. Asphalt binders were modified with varying percentages of NEP (0 %, 2 %, 4 %, and 6 %) and characterized using conventional and performance tests [i.e., rotational viscosity (RV), dynamic shear rheometer (DSR), bending beam rheometer (BBR)] to evaluate their rheological properties. Microstructural analyses, including X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDS), and Fourier-transform infrared spectroscopy (FTIR), were also conducted. The findings revealed adding up to 6 % NEP increased the softening point, complex modulus (G*), and viscosity while decreasing penetration grade, phase angle (δ), and ductility of the modified asphalt binder. NEP improved the high-temperature performance grade by one grade and enhanced rutting resistance without adversely affecting the low-temperature cracking resistance. Furthermore, NEP-modified binder demonstrated good performance at intermediate and low temperatures despite increased binder stiffness. The microstructural analyses indicated uniform dispersion of NEP elements on the modified binder surface, and the Si element from the Perlite nanoparticles exhibited the highest proportion in the modified asphalt binder, acting as fillers within the binder matrix. Overall, these characteristics of Perlite enabled it to enhance the rheological properties and performance of the asphalt binder, acting as an effective modifier when incorporated into the binder and displaying favorable performance at various temperature conditions.http://www.sciencedirect.com/science/article/pii/S2214509525000075Nano-Expanded Perlite (NEP)Modified asphalt binderRheological propertiesMicrostructural analysisEDS-mappingRutting |
| spellingShingle | Saeid Hesami Mohammad Mahzari Saeid Sobhi Mohammad Ali Bay Investigating the rheological properties and microstructural analysis of Nano-expanded Perlite modified asphalt binder Case Studies in Construction Materials Nano-Expanded Perlite (NEP) Modified asphalt binder Rheological properties Microstructural analysis EDS-mapping Rutting |
| title | Investigating the rheological properties and microstructural analysis of Nano-expanded Perlite modified asphalt binder |
| title_full | Investigating the rheological properties and microstructural analysis of Nano-expanded Perlite modified asphalt binder |
| title_fullStr | Investigating the rheological properties and microstructural analysis of Nano-expanded Perlite modified asphalt binder |
| title_full_unstemmed | Investigating the rheological properties and microstructural analysis of Nano-expanded Perlite modified asphalt binder |
| title_short | Investigating the rheological properties and microstructural analysis of Nano-expanded Perlite modified asphalt binder |
| title_sort | investigating the rheological properties and microstructural analysis of nano expanded perlite modified asphalt binder |
| topic | Nano-Expanded Perlite (NEP) Modified asphalt binder Rheological properties Microstructural analysis EDS-mapping Rutting |
| url | http://www.sciencedirect.com/science/article/pii/S2214509525000075 |
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