Physical, Rheological, and Morphological Properties of Asphalt Reinforced by Basalt Fiber and Lignin Fiber
Studies show that each kind of fiber has its own advantages in improving the properties of asphalt binders. However, there are very limited research studies about mixed fiber-reinforced asphalt (MFRA). In this study, two kinds of fibers, basalt fiber (BF) and lignin fiber (LF), were selected to rein...
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MDPI AG
2020-06-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/13/11/2520 |
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| author | Changjiang Kou Xing Wu Peng Xiao Yang Liu Zhengguang Wu |
| author_facet | Changjiang Kou Xing Wu Peng Xiao Yang Liu Zhengguang Wu |
| author_sort | Changjiang Kou |
| collection | DOAJ |
| description | Studies show that each kind of fiber has its own advantages in improving the properties of asphalt binders. However, there are very limited research studies about mixed fiber-reinforced asphalt (MFRA). In this study, two kinds of fibers, basalt fiber (BF) and lignin fiber (LF), were selected to reinforce SBS (styrene–butadiene–styrene triblock copolymer)-modified asphalt, which is now widely used in pavement engineering. MFRA samples with different fiber mix ratios (FMRs) were prepared for the tests of softening point, ductility, and rheological properties, the micromorphology of which was studied by using scanning electron microscope (SEM). The oil (asphalt) absorption rates of mixed fibers with different FMRs were also tested. The results show that the properties of MFRA were affected by the physical and chemical properties of fibers. Basalt fiber can better strengthen the physical properties of MFRA, while lignin fiber is good for improving the rheological properties, and the oil absorption rate of lignin fiber is higher than that of basalt fiber. Furthermore, the best FMR calculated by the efficacy coefficient method (ECM) was recommended as 1:2 (BF:LF). An interface layer between the fiber and asphalt was observed from the micro images, proving that the fibers bond well with the asphalt. Generally, mixing BF and LF together into SBS-modified asphalt could make full use of the advantages of different fibers and reinforce the comprehensive performance of MFRA better. |
| first_indexed | 2024-03-10T19:26:38Z |
| format | Article |
| id | doaj.art-4fbd0d4ac9d24a9fbf770b13277f1d08 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T19:26:38Z |
| publishDate | 2020-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-4fbd0d4ac9d24a9fbf770b13277f1d082023-11-20T02:28:09ZengMDPI AGMaterials1996-19442020-06-011311252010.3390/ma13112520Physical, Rheological, and Morphological Properties of Asphalt Reinforced by Basalt Fiber and Lignin FiberChangjiang Kou0Xing Wu1Peng Xiao2Yang Liu3Zhengguang Wu4College of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, ChinaCollege of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, ChinaCollege of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, ChinaCentre for Pavement and Transportation Technology, University of Waterloo, Waterloo, ON N2L 3G1, CanadaCollege of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, ChinaStudies show that each kind of fiber has its own advantages in improving the properties of asphalt binders. However, there are very limited research studies about mixed fiber-reinforced asphalt (MFRA). In this study, two kinds of fibers, basalt fiber (BF) and lignin fiber (LF), were selected to reinforce SBS (styrene–butadiene–styrene triblock copolymer)-modified asphalt, which is now widely used in pavement engineering. MFRA samples with different fiber mix ratios (FMRs) were prepared for the tests of softening point, ductility, and rheological properties, the micromorphology of which was studied by using scanning electron microscope (SEM). The oil (asphalt) absorption rates of mixed fibers with different FMRs were also tested. The results show that the properties of MFRA were affected by the physical and chemical properties of fibers. Basalt fiber can better strengthen the physical properties of MFRA, while lignin fiber is good for improving the rheological properties, and the oil absorption rate of lignin fiber is higher than that of basalt fiber. Furthermore, the best FMR calculated by the efficacy coefficient method (ECM) was recommended as 1:2 (BF:LF). An interface layer between the fiber and asphalt was observed from the micro images, proving that the fibers bond well with the asphalt. Generally, mixing BF and LF together into SBS-modified asphalt could make full use of the advantages of different fibers and reinforce the comprehensive performance of MFRA better.https://www.mdpi.com/1996-1944/13/11/2520mixed fiber-reinforced asphaltfiber mix ratiobasalt fiberlignin fibercomprehensive performance |
| spellingShingle | Changjiang Kou Xing Wu Peng Xiao Yang Liu Zhengguang Wu Physical, Rheological, and Morphological Properties of Asphalt Reinforced by Basalt Fiber and Lignin Fiber Materials mixed fiber-reinforced asphalt fiber mix ratio basalt fiber lignin fiber comprehensive performance |
| title | Physical, Rheological, and Morphological Properties of Asphalt Reinforced by Basalt Fiber and Lignin Fiber |
| title_full | Physical, Rheological, and Morphological Properties of Asphalt Reinforced by Basalt Fiber and Lignin Fiber |
| title_fullStr | Physical, Rheological, and Morphological Properties of Asphalt Reinforced by Basalt Fiber and Lignin Fiber |
| title_full_unstemmed | Physical, Rheological, and Morphological Properties of Asphalt Reinforced by Basalt Fiber and Lignin Fiber |
| title_short | Physical, Rheological, and Morphological Properties of Asphalt Reinforced by Basalt Fiber and Lignin Fiber |
| title_sort | physical rheological and morphological properties of asphalt reinforced by basalt fiber and lignin fiber |
| topic | mixed fiber-reinforced asphalt fiber mix ratio basalt fiber lignin fiber comprehensive performance |
| url | https://www.mdpi.com/1996-1944/13/11/2520 |
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