01031313

Component

https://doi.org/10.3141/1970-13

http://scholar.google.com...asin&publication_year=2006

The Strategic Highway Research Program expended great effort in developing the Superpave® gyratory compactor (SGC) as a modern, technologically advanced tool for the design of hot-mix asphalt (HMA) paving mixtures and for preparation of realistic test specimens for laboratory evaluation. Since the widely accepted SGC was designed to produce specimens similar to actual pavement layers and since the current series of Texas Department of Transportation (TxDOT) HMA paving mixtures have demonstrated acceptable performance, TxDOT wished to replace the Texas gyratory compactor (TGC) with the SGC for the design of its current repertoire of dense-graded mixtures. In the first phase of this study, the authors developed a specification for the number of design gyrations with the SGC to achieve the same optimum asphalt content (OAC) as that obtained with the TGC. However, on the basis of past experience, review of the literature, and feedback from TxDOT, the design OAC was considered to be too low; mixtures that may be susceptible to fatigue cracking resulted. To mitigate this problem, the authors revised the specification for use of the SGC so that the resulting mixtures had an increased OAC. This revision was done by comparing the rutting resistance of HMA mixtures designed at different numbers of gyrations with the Hamburg wheel-tracking device and then selecting the lowest number of gyrations that did not compromise rutting resistance of the mixture. Results show that it is possible to select a considerably lower number of design gyrations with the SGC without a significant decrease in rutting performance of the mixtures.

01038330

English

pp 106-115

2006

Transportation Research Record: Journal of the Transportation Research Board

030909979X

Print

Figures (5) ; References (8) ; Tables (10)

Asphalt content; Hot mix asphalt; Rutting; Superpave

Gyratory compactors; Wheel tracking devices

Texas

Highways; Materials; I31: Bituminous Binders and Materials

PRP, TRIS, TRB, ATRI

Mar 3 2006 10:56AM

• Comparing Resilient Modulus and Dynamic Modulus of Hot-Mix Asphalt as Material Properties for Flexible Pavement Design
• Computational Model to Predict Fatigue Damage Behavior of Asphalt Mixtures Under Cyclic Loading
• Determination of Asphalt Concrete Complex Modulus with Impact Resonance Test
• Dissipated Energy Approach to Study Hot-Mix Asphalt Healing in Fatigue
• Establishment of Precision of Dynamic Angle Validation Kit with Hot-Mix Simulator for Superpave Gyratory Compactors
• Evaluation of Effect of Heat-Adhesive Emulsions for Tack Coats with Shear Test: From the Road Research Laboratory of Barcelona
• Evaluation of Hamburg Wheel-Tracking Device Test with Laboratory and Field Performance Data (With Discussion and Closure)
• Evaluation of Healing Property of Asphalt Mixtures
• Evaluation of Testing Protocols for Dynamic Modulus of Hot-Mix Asphalt
• Investigating Pavement Cracking: Evolutionary Modular Neural Network Approach
• Limits on Adhesive Bond Energy for Improved Resistance of Hot-Mix Asphalt to Moisture Damage
• Long-Term Effectiveness of Antistripping Additives: Laboratory Evaluation
• Measurements of Moisture Suction and Diffusion Coefficient in Hot-Mix Asphalt and Their Relationships to Moisture Damage
• Mechanical Mixture Simulation Devices for Determining and Calibrating Internal Angle of Gyration in Superpave Gyratory Compactor
• Micromechanical Analyses for Measurement and Prediction of Hot-Mix Asphalt Fracture Energy
• Micromechanical Modeling Approach to Predict Compressive Dynamic Moduli of Asphalt Mixtures Using the Distinct Element Method
• New Laboratory Equipment for Study of Reflective Cracking in Asphalt Overlays
• Observation of Crack Propagation in Asphalt Mixtures Using Acoustic Emission
• Pavement Design Analysis with 2002 Design Guide Software
• Permanent Deformation Analysis of Hot-Mix Asphalt Mixtures Using Simple Performance Tests and 2002 Mechanistic-Empirical Pavement Design Software
• Simple Method for Predicting Laboratory and Field Permeability of Hot-Mix Asphalt
• Uniaxial Penetration Testing for Shear Resistance of Hot-Mix Asphalt Mixtures