Experimental Testing and Analysis Procedure to Determine the Apparent Film Thickness of Asphalt Binder in Fine Aggregate Matrix Mixtures
The fine aggregate matrix (FAM) is an important constituent of an asphalt concrete mixture; the FAM is where some key damage phenomena such as cracking start and propagate. The proper design and fabrication of isolated FAM testing samples that are representative of the material existing within asphalt concrete mixtures requires the objective determination of key characteristics such as the apparent film thickness (FT) of the asphalt binder and the specific surface area of the aggregates. These relevant parameters facilitate the estimation of the binder content. This study presents an experimental testing and analysis protocol to determine the apparent FT that covers particles of fine aggregate in FAM mixtures. The method is based on tests using a scanning electron microscope and a digital image analysis procedure using the open-source Fiji/ImageJ software. The results indicated that apparent FT ranged between 0.5 µm and 30 µm. An additional validation effort was pursued and demonstrated the applicability of the proposed methodology, which can provide meaningful information to improve volumetric-based FAM mix design methods and generate materials that are more representative of those existing in the asphalt concrete mixtures.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/03611981
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Supplemental Notes:
- © National Academy of Sciences: Transportation Research Board 2021.
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Authors:
- Vieira, Lucas Henrique
- de Souza, Thiago Delgado
- Enríquez-León, Alexis Jair
- Aragão, Francisco Thiago Sacramento
- Gomes, Otávio da Fonseca Martins
- Leite, Leni Figueiredo Mathias
- de Rezende, Lilian Ribeiro
- Publication Date: 2021-7
Language
- English
Media Info
- Media Type: Web
- Features: References;
- Pagination: pp 166-179
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Serial:
- Transportation Research Record: Journal of the Transportation Research Board
- Volume: 2675
- Issue Number: 7
- Publisher: Sage Publications, Incorporated
- ISSN: 0361-1981
- EISSN: 2169-4052
- Serial URL: http://journals.sagepub.com/home/trr
Subject/Index Terms
- TRT Terms: Asphalt concrete; Binder content; Bituminous binders; Films (Coatings); Fine aggregates; Mix design; Test procedures; Thickness
- Subject Areas: Highways; Materials; Pavements;
Filing Info
- Accession Number: 01783302
- Record Type: Publication
- Files: TRIS, TRB, ATRI
- Created Date: Sep 27 2021 6:21PM