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Showing 1 to 13 of 13 for “"Field cores"”.
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Initial Exploration of Reduced Gyrations for Arkansas Asphalt Mix Designs
… combat the premature cracking of asphalt in the field is to ensure there is enough asphalt binder within the mix. This will help the flexibility of the asphalt undergoing large loads and deformation. However, it is widely accepted that mix designs across the country lack the appropriate amount of …
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PERMEABILITY AND MOISTURE DAMAGE CHARACTERISTICS OF ASPHALT PAVEMENTS
… correlation of laboratory permeability with field permeability is examined. In this study, a field survey is conducted to identify a set of eight pavements (bad) that are known to suffer from moisture damage and a set of eight pavements (good) that do not exhibit moisture damage. Field …
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Balancing asphalt mixes containing recycled materials for optimum field performance
… lab-compacted (PMLC) mixes and three sets of field cores. The extensive exploratory data analysis on creep compliance showed that softer binder and higher asphalt content result in more compliant mixes, while recycled materials tend to decrease the compliance of AC mixes. Likewise, softer …
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Asphalt Oxidation Kinetics and Pavement Oxidation Modeling
… the oxygen diffusion region in the mastic. A field calibration factor accounted for the factors not considered in the model such as the effect of small aggregate particles on oxygen diffusion. Carbonyl area and viscosity of binders recovered from field cores of three pavements in Texas were …
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Utilization of Instrument Response of SuperPaveTM Mixes at the Virginia Smart Road to Calibrate Laboratory Developed Fatigue Equations
… most of the existing models do not reflect field fatigue behavior. This is manifested in the fact that HMA fatigue failure is achieved much faster under a laboratory setting than in a field environment. This difference has been typically accounted for by the use of a single shift factor …
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Performance analysis of asphalt mixtures modified with ground tire rubber and recycled materials
… was conducted on plant-compacted gyratories and field cores, namely, Disk-Shaped Compact Tension (DC(T)) test, DC(T) Creep Compliance test, Acoustic Emission (AE) test, and Hamburg Wheel Tracking Test. Further, DC(T)-Hamburg results were plotted on Performance-Space Diagram to obtain a holistic …
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Development of Laboratory to Field Shift Factors for Hot-Mix Asphalt Resilient Modulus
… Road were determined. Testing was performed on Field cores (F/F) and laboratory-compacted plant mixed (F/L), laboratory mixed and compacted per field design (L/L), and laboratory designed, mixed, and compacted (D/L) specimens. The applied load was chosen to induce a strain ranging between 150 …
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An analysis of impact factors on the Illinois flexibility index test
… can be easily controlled, the qualities of field core specimens are typically out of the researcher’s control. Two main parameters, while controlled for laboratory-produced specimens, will typically be uncontrolled for field core specimens. These parameters are the specimen thickness and the …
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Evaluation of bonded concrete overlays on asphalt pavements
A field performance study of 19 bonded concrete overlays on asphalt pavements (BCOA) projects in 9 states were completed in this research study. BCOA pavements ranged in age from 7 to 26-years old and average thickness per project of 3.8 to 9.3 inches. The panel size varied from 4 ft x 4ft to 12 ft …
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Fracture characterization of thin bonded asphalt concrete overlay systems
… in the pavement. Use of these tests on field-procured samples of TBO yields a crack front that encounters nonhomogeneous material through the specimen thickness. The crack moves perpendicular to the axis of material nonhomogeneity, which makes data interpretation and fundamental material …
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Prediction of asphalt concrete pavement density from processing ground-penetrating radar compaction data
… performance. Approaches such as lab-testing of field cores, in-situ nuclear gauge measurements, and intelligent compaction prediction have shortcomings, such as limited area coverage, labor- and time-intensiveness, use of hazardous materials, and unreliability. Ground-penetrating radar (GPR) …
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Role of pavements in urban energetics
… air temperature in a sub-area of a city. Asphalt field cores were characterized by a Transient Plane Source (TPS) technique for thermal properties and a spectrophotometer for optical properties. A new bilinear aging albedo model was developed, which can be easily calibrated. Lab concrete specimens …
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Laboratory characterization and field performance of hot in-place recycled mixtures
… study is to characterize material properties and field performance of HIR treatments. Three field sites were evaluated as part of the study: Galesburg and Machesney in Illinois and Dyer in Indiana. Surface recycling followed by asphalt concrete (AC) overlay was used for all the three sites under …