01158101

Component

https://doi.org/10.3141/2181-09

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

The NCHRP 9-19 panel recommended the repeated load permanent deformation test as a laboratory procedure that could be used to evaluate the resistance of a hot-mix asphalt (HMA) to tertiary flow. No standard test protocol addresses the required laboratory stress to be applied. The test can take several hours until tertiary flow is reached and in many cases the sample may never fail. A model capable of predicting or providing general guidance on the flow number characteristics of a mix can be of great value. The model can be ideally used as a guideline to determine the stress–temperature combination that will yield tertiary flow within a reasonable testing time. In this study, an effort was undertaken to develop a flow number predictive model. The model uses HMA mixture volumetric properties and stress–temperature testing conditions as predictor variables. The laboratory test data used are a combination of two valuable databases. The first one included tests conducted at Arizona State University; the second one included tests conducted by the FHWA Mobile Asphalt Material Testing Laboratory. Ninety-four mixtures were evaluated, and 1,759 flow number test results were available. Various regression models were evaluated by combining several independent variables. The final model selected had fair statistical measures of accuracy, and it covered a wide range of mixtures, gradations, and binder properties, as well as laboratory-applied stress. As more testing data become available, the model could be refined and recalibrated for better accuracy.

01328240

10-2686

English

pp 79-87

2010

Transportation Research Record: Journal of the Transportation Research Board

9780309160551

Print

Figures (6) ; References (9) ; Tables (4)

Databases; Hot mix asphalt; Laboratory tests; Load tests; Mathematical models

Flow number; Tertiary flow; Test data

Highways; Materials; Pavements; I31: Bituminous Binders and Materials

TRIS, TRB, ATRI

Jan 25 2010 11:18AM

• Characterization of Permanent Deformation of Asphalt Mixtures Based on Shear Properties
• 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
• Estimation of Stress Conditions for the Flow Number Simple Performance Test
• 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