Microstructure Analysis of Modified Asphalt Mixtures under Freeze-Thaw Cycles Based on CT Scanning Technology
The modifiers NTC (nano-TiO<sub>2</sub>/CaCO<sub>3</sub>) and BF (basalt fiber) were adopted to modify a base matrix asphalt mixture. The base matrix asphalt mixture and three kinds of modified asphalt mixture under F⁻T (freeze⁻thaw) cycles were scanned by...
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doaj-b3ba453491434695a4fb232742e96b392020-11-24T20:59:13ZengMDPI AGApplied Sciences2076-34172018-11-01811219110.3390/app8112191app8112191Microstructure Analysis of Modified Asphalt Mixtures under Freeze-Thaw Cycles Based on CT Scanning TechnologyYafeng Gong0Haipeng Bi1Chunyu Liang2Shurong Wang3College of Transportation, Jilin University, Changchun 130025, ChinaCollege of Transportation, Jilin University, Changchun 130025, ChinaCollege of Transportation, Jilin University, Changchun 130025, ChinaCollege of Transportation, Jilin University, Changchun 130025, ChinaThe modifiers NTC (nano-TiO<sub>2</sub>/CaCO<sub>3</sub>) and BF (basalt fiber) were adopted to modify a base matrix asphalt mixture. The base matrix asphalt mixture and three kinds of modified asphalt mixture under F⁻T (freeze⁻thaw) cycles were scanned by computed tomography. The air voids and morphological changes of asphalt mixture were summarized by image processing technology, and the development process of F⁻T damage to asphalt mixture was explained from a micro-view. The porosity of NTC-modified asphalt mixture changed little, and the void distribution between base matrix asphalt mixture and NTC-BF (nano-TiO<sub>2</sub>/CaCO<sub>3</sub> and basalt fiber) composite modified asphalt mixture was more uniform. The macro-pores in the asphalt mixture under 15 F⁻T cycles began to connect gradually, and the pore characteristics also changed. The number and shape of the pores changed under 15 F⁻T cycles. According to the state characteristics, the change amplitude of the pore characteristics of matrix asphalt mixture and NTC-BF composite modified asphalt mixture were the most stable under F⁻T cycles.https://www.mdpi.com/2076-3417/8/11/2191computed tomographymodified asphalt mixturefreeze–thaw cyclesimage processing technologymicrostructure analysis |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yafeng Gong Haipeng Bi Chunyu Liang Shurong Wang |
spellingShingle |
Yafeng Gong Haipeng Bi Chunyu Liang Shurong Wang Microstructure Analysis of Modified Asphalt Mixtures under Freeze-Thaw Cycles Based on CT Scanning Technology Applied Sciences computed tomography modified asphalt mixture freeze–thaw cycles image processing technology microstructure analysis |
author_facet |
Yafeng Gong Haipeng Bi Chunyu Liang Shurong Wang |
author_sort |
Yafeng Gong |
title |
Microstructure Analysis of Modified Asphalt Mixtures under Freeze-Thaw Cycles Based on CT Scanning Technology |
title_short |
Microstructure Analysis of Modified Asphalt Mixtures under Freeze-Thaw Cycles Based on CT Scanning Technology |
title_full |
Microstructure Analysis of Modified Asphalt Mixtures under Freeze-Thaw Cycles Based on CT Scanning Technology |
title_fullStr |
Microstructure Analysis of Modified Asphalt Mixtures under Freeze-Thaw Cycles Based on CT Scanning Technology |
title_full_unstemmed |
Microstructure Analysis of Modified Asphalt Mixtures under Freeze-Thaw Cycles Based on CT Scanning Technology |
title_sort |
microstructure analysis of modified asphalt mixtures under freeze-thaw cycles based on ct scanning technology |
publisher |
MDPI AG |
series |
Applied Sciences |
issn |
2076-3417 |
publishDate |
2018-11-01 |
description |
The modifiers NTC (nano-TiO<sub>2</sub>/CaCO<sub>3</sub>) and BF (basalt fiber) were adopted to modify a base matrix asphalt mixture. The base matrix asphalt mixture and three kinds of modified asphalt mixture under F⁻T (freeze⁻thaw) cycles were scanned by computed tomography. The air voids and morphological changes of asphalt mixture were summarized by image processing technology, and the development process of F⁻T damage to asphalt mixture was explained from a micro-view. The porosity of NTC-modified asphalt mixture changed little, and the void distribution between base matrix asphalt mixture and NTC-BF (nano-TiO<sub>2</sub>/CaCO<sub>3</sub> and basalt fiber) composite modified asphalt mixture was more uniform. The macro-pores in the asphalt mixture under 15 F⁻T cycles began to connect gradually, and the pore characteristics also changed. The number and shape of the pores changed under 15 F⁻T cycles. According to the state characteristics, the change amplitude of the pore characteristics of matrix asphalt mixture and NTC-BF composite modified asphalt mixture were the most stable under F⁻T cycles. |
topic |
computed tomography modified asphalt mixture freeze–thaw cycles image processing technology microstructure analysis |
url |
https://www.mdpi.com/2076-3417/8/11/2191 |
work_keys_str_mv |
AT yafenggong microstructureanalysisofmodifiedasphaltmixturesunderfreezethawcyclesbasedonctscanningtechnology AT haipengbi microstructureanalysisofmodifiedasphaltmixturesunderfreezethawcyclesbasedonctscanningtechnology AT chunyuliang microstructureanalysisofmodifiedasphaltmixturesunderfreezethawcyclesbasedonctscanningtechnology AT shurongwang microstructureanalysisofmodifiedasphaltmixturesunderfreezethawcyclesbasedonctscanningtechnology |
_version_ |
1716783282399477760 |