Optimization of Tack Coat for Hot-Mix Asphalt Placement
Selection of an optimum tack coat material and application rate is critical in the development of proper bond strength between pavement layers. The main objectives of this project were to determine optimum application methods, equipment type and calibration procedures, residual application rates, and asphalt binder materials for the various uses of tack coats and to recommend revisions to relevant AASHTO test methods and practices related to tack coats. During the course of this project, the research team developed the Louisiana Tack Coat Quality Tester (LTCQT) to evaluate the quality of tack coat spray application in the field. Further, the Louisiana Interlayer Shear Strength Tester (LISST) was developed for characterization of interface shear strength of cylindrical specimens in the laboratory. Research in this project also quantified the effects of tack coat material type, tack coat application rate, and pavement surface type including milled versus unmilled surfaces on the interlayer shear strength (ISS) based on full-scale field tests. The variation of ISS between field and laboratory-prepared samples was also investigated. To achieve this objective, five types of tack coat materials were applied at three application rates on four different types of surfaces at the Louisiana Transportation Research Center Pavement Research Facility site. Samples were cored from the constructed test lanes, and the ISS was measured using the LISST. Based on the results of this analysis, conclusions were drawn regarding application rate, surface type, wetness, and preparation method.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/00978515
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Authors:
- Mohammad, Louay N
- Elseifi, Mostafa A
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Conference:
- Enhancing the Durability of Asphalt Pavements Workshop
- Location: Washington DC, United States
- Date: 2013-1-13 to 2013-1-13
- Publication Date: 2014-9
Language
- English
Media Info
- Media Type: Digital/other
- Features: Figures; Photos; References; Tables;
- Pagination: pp 35-49
- Monograph Title: Enhancing the Durability of Asphalt Pavements: Papers from a Workshop
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Serial:
- Transportation Research Circular
- Issue Number: E-C186
- Publisher: Transportation Research Board
- ISSN: 0097-8515
Subject/Index Terms
- TRT Terms: Asphalt mixtures; Asphalt pavements; Durability; Hot mix asphalt; Moisture content; Pavement interlayers; Shear strength; Sprayers; Surface preparation; Tack coats; Test procedures
- Geographic Terms: Louisiana
- Subject Areas: Highways; Materials; Pavements; I31: Bituminous Binders and Materials; I52: Construction of Pavements and Surfacings;
Filing Info
- Accession Number: 01539921
- Record Type: Publication
- Files: TRIS, TRB, ATRI
- Created Date: Oct 7 2014 9:53AM