01620208

Component

https://doi.org/10.3141/2631-14

Geosynthetics, such as fabrics, grids, and composites, were introduced to asphalt pavements to mitigate reflective cracking or the creation of moisture barriers or both. Reinforcing interlayer systems, such as grids, have been shown to be effective in retarding the reflection of cracks in the underlying pavement into the upper layers. However, the effect of different interlayer systems on the performance of the pavement varies. The aim of this research was to compare the effects of fiberglass grids, paving fabric, and paving mat systems on the fatigue and fracture performance of double-layer beam specimens under four-point notched bending beam fatigue loading. Double-layer asphalt concrete beam specimens were loaded in a displacement control mode until full-depth cracking was observed. Haversine displacements with zero and maximum deflection peaks were applied to the specimens at frequencies of 5 and 10 Hz. The digital image correlation technique was used to determine and compare the damage mechanisms with stiffness curves plotted by using load and displacement data. A comparison of the results from beams with different interlayer systems showed that the type of interlayer system can noticeably affect the damage mechanisms and the performance of the fatigue specimen. In general, grid systems performed better when the interface bond was stronger. In nongrid interlayers, while interfacial damage created a discontinuity that increased the risk of interfacial debonding, a more flexible interlayer dissipated more energy at the interface and delayed the full vertical cracking of the beams under four-point bending beam fatigue loading.

01637861

17-06135

English

pp 123–132

2017

Transportation Research Record: Journal of the Transportation Research Board

9780309441506

Digital/other

Figures (6) ; References (20) ; Tables (2)

Asphalt concrete; Asphalt concrete pavements; Failure; Fiberglass; Flexural strength; Geosynthetics; Pavement cracking; Pavement design; Pavement interlayers; Pavement performance

Design; Highways; Materials; Pavements

TRIS, TRB, ATRI

Dec 8 2016 12:29PM

• Characterization of Permanent Deformation of Asphalt Mixtures with Minimum Strain Rate, LVECD Program, and Triaxial Stress Sweep Test
• Effect of Pore Water Pressure on Response of Asphalt Concrete
• Evaluation of Small Specimen Geometries for Asphalt Mixture Performance Testing and Pavement Performance Prediction
• Laboratory Evaluation of a Plant-Produced High Polymer–Content Asphalt Mixture
• New and Simpler Cracking Test Method for Asphalt Mix Designs
• Numerical Modeling and Artificial Neural Network for Predicting J-Integral of Top-Down Cracking in Asphalt Pavement
• Overlay Tester Results from Dense-Graded Asphalt Concrete Mixes: Accuracy in Characterizing Crack Susceptibility
• Practical Method to Determine Strain Level for Cyclic Direct Tension Fatigue Testing in the Asphalt Mixture Performance Tester
• Sensitivity of the Illinois Flexibility Index Test to Mixture Design Factors
• Short-Term Performance and Evolution of Material Properties of Warm- and Hot-Mix Asphalt Pavements: Case Studies
• The Logit Model and the Need to Reproduce the Stiffness Degradation Curve of Asphalt Specimens During Fatigue Testing
• Use of Digital Image Correlation for the Evaluation of Flexural Fatigue Behavior of Asphalt Beams with Geosynthetic Interlayers
• Use of Fine Aggregate Matrix Experimental Data in Improving Reliability of Fatigue Life Prediction of Asphalt Concrete: Sensitivity of This Approach to Variation in Input Parameters
• Use of Nonlinear Acoustic Measurements for Estimation of Fracture Performance of Aged Asphalt Mixtures
• Viscoelasticplastic–Fracture Modeling of Asphalt Mixtures Under Monotonic and Repeated Loads