01356811

Component

https://doi.org/10.3141/2210-12

http://scholar.google.com....+Ji&publication_year=2011

Numerous research studies have been conducted on the connection between asphalt material properties and pavement performance. Asphalt mixture performance tests (AMPTs) have been part of these efforts in the past few years. One such test is the flow number test, the output of which is the flow number. Recent studies have found that flow number correlates well with the rutting potential of asphalt pavement. However, the current method used in AMPTs to examine the flow number also was highly sensitive to the variation of testing data (resulting in inaccurate flow number values) and time-consuming, especially when used on stiff asphalt mixtures. The main goal is to determine the flow number with the use of the deformation rate at the secondary state from the result of the flow number test. One hundred twenty-two flow number tests were conducted. A stepwise method was used to overcome variations in results from the flow number test. The flow number was determined with the stepwise method, then compared with the flow deformation rate. A strong correlation between flow number and deformation rate was found. Therefore, the deformation rate can be used to estimate flow number, which significantly reduces testing time. The proposed method also allows the flow number test to be terminated as soon as the permanent strain reaches 1.2%.

01356813

11-3349

English

pp 106-112

2011

Transportation Research Record: Journal of the Transportation Research Board

9780309167468

Print

Figures (6) ; References (31) ; Tables (2)

Asphalt mixtures; Asphalt pavements; Deformation; Performance tests; Rutting

Flow number

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

TRIS, TRB, ATRI

Nov 14 2011 1:16PM

• Determination of Crack Size Distribution in Asphalt Mixtures
• Effect of Thermal Stresses on Fatigue Behavior in Bituminous Mixes
• Effects of Asphalt Mixture Properties on Permanent Deformation Response
• Effects of Nonuniform and Three-Dimensional Contact Stresses on Near-Surface Cracking
• Evaluation of Dynamic Modulus Predictive Equations for Southeastern United States Asphalt Mixtures
• Evaluation of Fracture Toughness of Semirigid Asphalt Concretes at Low Temperatures
• Evaluation of Predictive Models for Estimating Dynamic Modulus of Hot-Mix Asphalt in Oklahoma
• Factors That Affect Cracking Performance in Hot-Mix Asphalt Mix Design
• Laboratory Evaluation of Asphalt Binders and Mixtures Containing Polyphosphoric Acid
• Permanent Deformation Model Based on Shear Properties of Asphalt Mixtures: Development and Calibration
• Reduced Testing Protocol for Measuring the Confined Dynamic Modulus of Asphalt Mixtures
• Search for a Laboratory Test to Evaluate Crack Resistance of Hot-Mix Asphalt
• Significance of Confined Dynamic Modulus Laboratory Testing for Asphalt Concrete: Conventional, Gap-Graded, and Open-Graded Mixtures