01090268

Component

https://doi.org/10.3141/2087-11

http://scholar.google.com...Wang&publication_year=2008

This paper investigates the issue of converting testing frequency in a dynamic modulus test of hot-mix asphalt (HMA) to loading time for implementation in the proposed mechanistic–empirical pavement design guide. Two methods have been proposed in the literature. The first is to convert the test frequency (f; in hertz) to loading time (t; in seconds) by using t = 1/f. The second method is to convert the test angular frequency (ω) to the loading time (in seconds) by using t = 1/ω = 1/2πf. An exact interconversion based on the representation of dynamic modulus results by using a generalized Kelvin model and a generalized Maxwell model is presented. The exact interconversion is compared with the two debated methods of converting the dynamic modulus or the storage modulus to a stiffness (inverse of creep compliance) and relaxation modulus. It is shown that both methods result in error in determining either the relaxation modulus or stiffness. On the other hand, it is shown that the resilient modulus can be adequately approximated by the dynamic modulus taken at a frequency of 1/t.

01121592

English

pp 99-108

2008

Transportation Research Record: Journal of the Transportation Research Board

9780309126007

Print

Figures (12) ; References (18)

Creep; Dynamic modulus of elasticity; Errors; Hot mix asphalt; Load tests; Modulus of resilience; Pavement design; Stiffness

Mechanistic-Empirical Pavement Design Guide

Data conversion; Kelvin and Maxwell models; Testing frequency; Testing time

Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways

TRIS, TRB, ATRI

Jan 29 2008 4:13PM

• Accuracy of Current Complex Modulus Selection Procedure from Vehicular Load Pulse: NCHRP Project 1-37A Mechanistic–Empirical Pavement Design Guide
• Adaptation of Mechanistic–Empirical Pavement Design Guide for Design of Minnesota Low-Volume Portland Cement Concrete Pavements
• Benefits of the Minnesota Road Research Project
• Calibration of Mechanistic–Empirical Models for Flexible Pavements Using California Heavy Vehicle Simulators
• Coefficient of Thermal Expansion of Concrete Materials: Characterization to Support Implementation of the Mechanistic–Empirical Pavement Design Guide
• Database Support for the New Mechanistic–Empirical Pavement Design Guide
• Detection of Delamination in Concrete Pavements Using Ground-Coupled Ground-Penetrating Radar Technique
• Dynamic Analysis and In-Situ Validation of Perpetual Pavement Response to Vehicular Loading
• Effect of Traffic Load Measurement Bias on Pavement Life Prediction: A Mechanistic-Empirical Perspective
• Local Calibration of Mechanistic–Empirical Pavement Design Guide for Flexible Pavement Design
• Pavement Rutting Performance Prediction by Integrated Weibull Approach
• Repeatability of Asphalt Strain Measurements Under Full-Scale Dynamic Loading
• Strain and Pulse Duration Considerations for Extended-Life Hot-Mix Asphalt Pavement Design