01151161

Component

https://doi.org/10.3141/2181-08

http://scholar.google.com...aaly&publication_year=2010

The flow number simple performance test for asphalt mixtures was one of the final three tests selected for further evaluation from the 24 tests initially examined under the NCHRP 9-19 project. Currently, no standard triaxial testing conditions for the magnitude of the deviator and confining stresses have been specified. The objective of this research was to develop recommendations for the selection of the deviator and confining stresses that best simulate the stress conditions encountered in the pavement under traffic loads. Extensive mechanistic analyses of three different asphalt pavement structures subjected to moving traffic loads at various speeds and under braking and nonbraking conditions were conducted with the 3D-Move model. Prediction equations for estimating the anticipated deviator and confining stresses as a function of pavement temperature, vehicle speed, and asphalt mixture’s stiffness have been developed. An increase of 40% was observed for the deviator stress when braking conditions were incorporated. A preliminary validation of the recommended magnitudes for the deviator and confining stresses on a field mixture from WesTrack showed consistent results between the flow number test results and field performance.

01328240

10-2652

English

pp 67-78

2010

Transportation Research Record: Journal of the Transportation Research Board

9780309160551

Print

Figures (9) ; References (17) ; Tables (3)

Asphalt mixtures; Asphalt pavements; Braking; Deviatoric stress; Stiffness; Traffic loads

3D-Move (Computer model); WesTrack test road (FHWA)

Confining stress; Flow number; Simple performance tests

Design; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I31: Bituminous Binders and Materials

TRIS, TRB, ATRI

Jan 25 2010 11:17AM

• Characterization of Permanent Deformation of Asphalt Mixtures Based on Shear Properties
• Development of a Flow Number Predictive Model
• Development of Artificial Neural Network Predictive Models for Populating Dynamic Moduli of Long-Term Pavement Performance Sections
• Effect of Thermal Stresses on Pavement Performance Under Mild Climate Conditions
• Estimate of Fatigue Shift Factors Between Laboratory Tests and Field Performance
• Fénix Test: Development of a New Test Procedure for Evaluating Cracking Resistance in Bituminous Mixtures
• Fatigue Crack Propagation Model of Asphalt Concrete Based on Viscoelastic Fracture Mechanics
• Multiscale Modeling to Predict Mechanical Behavior of Asphalt Mixtures
• Rutting Resistance of Laboratory-Prepared and Field-Compacted Asphalt Mixtures
• Semiempirical, Analytical, and Computational Predictions of Dynamic Modulus of Asphalt Concrete Mixtures
• Stiffening Mechanisms of Asphalt–Aggregate Mixtures: From Binder to Mixture
• Use of Nonuniform Stress-State Tests to Determine Fracture Energy of Asphalt Mixtures Accurately