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Title: Improved Practical Model for Permeability and Implications for the Design of High-Performance Hot-Mix Asphalt
Accession Number: 01550356
Record Type: Component
Record URL: Availability: Transportation Research Board Business Office 500 Fifth Street, NW Find a library where document is available Abstract: The purpose of this paper is to present an empirical model to estimate hot-mix asphalt (HMA) permeability with the use of common compositional factors. The model is an improvement of one originally developed as part of NCHRP Projects 9-25 and 9-31 but uses an expanded data set to provide a better model. The elimination of unrealistic mixture compositions from the data set and the consideration of additional potential predictors have resulted in a model with significantly improved accuracy and usefulness. The model predicts that permeability increases primarily with increases in air voids. However, aggregate properties also affect permeability: increases in nominal maximum aggregate size and decreases in mean aggregate particle size (D₅₀) tend to decrease HMA permeability. The model suggests that, when durability is an important concern, fine aggregate gradations should be used for HMA mix designs.
Monograph Title: Monograph Accession #: 01587029
Report/Paper Numbers: 15-2884
Language: English
Authors: Christensen, DonaldBonaquist, Ramon FPagination: pp 1–5
Publication Date: 2015
ISBN: 9780309369312
Media Type: Print
Features: Figures
(6)
; References
(8)
; Tables
(4)
TRT Terms: Uncontrolled Terms: Subject Areas: Highways; Materials; Pavements; I31: Bituminous Binders and Materials
Files: TRIS, TRB, ATRI
Created Date: Dec 30 2014 12:58PM
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