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Title: Modifying the Viscosity Based Witczak Model and Developing Phase Angle Predictive Model for New Mexico’s Superpave Mixes
Accession Number: 01594473
Record Type: Component
Abstract: This study modifies the viscosity (η) based Witczak dynamic modulus (|E*|) predictive equation which is used in the recently developed American Association of State Highway and Transportation Officials (AASHTO)Ware pavement Mechanistic-Empirical (ME) design software. A total of 21 Superpave (SP) mixtures with different gradations and binder grades were tested for |E*| at different temperatures and frequencies of loading. Results show that the η-based Witczak model underestimates the |E*| for New Mexico’s SP mixes. Therefore, revised model is developed using regression analysis. A phase angle (ϕ) predictive model is also developed using the ϕ-values obtained during the |E*| testing. It was found that the revised η- based Witczak model determines the |E*| more accurately compared to the original η-based Witczak model.
Supplemental Notes: This paper was sponsored by TRB committee AFK50 Standing Committee on Characteristics of Asphalt Paving Mixtures to Meet Structural Requirements.
Alternate title: Modifying Viscosity-Based Witczak Model and Developing Phase Angle Predictive Model for New Mexico’s Superpave Mixes
Monograph Title: Monograph Accession #: 01584066
Report/Paper Numbers: 16-3180
Language: English
Corporate Authors: Transportation Research Board 500 Fifth Street, NW Authors: Rahman, A S M AIslam, Md RashadulTarefder, Rafiqul APublication Date: 2016
Conference:
Transportation Research Board 95th Annual Meeting
Location:
Washington DC, United States Media Type: Digital/other
TRT Terms: Uncontrolled Terms: Geographic Terms: Subject Areas: Highways; Materials; Pavements
Source Data: Transportation Research Board Annual Meeting 2016 Paper #16-3180
Files: TRIS, TRB, ATRI
Created Date: Jan 12 2016 5:25PM
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