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Showing 1 to 20 of 35 for “"Asphalt Concrete (AC)"”.
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Mechanistic Design Concepts for Full-Depth Asphalt Concrete Pavements
A mechanistic design procedure for Full-Depth asphalt concrete AC pavements for highways is proposed and validated. The procedure is based on ILLI-PAVE, a stress dependent finite element computer program, coupled with appropriate transfer functions.
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ANALYTICAL MODELING OF RUTTING POTENTIAL OF ASPHALT MIXES USING HAMBURG WHEEL TRACKING DEVICE
Asphalt Concrete (AC) is susceptible to permanent deformation under traffic loading which is affected by AC temperature, mixture type, gradation, aggregate type, binder type and so on. There is no complete research in the literature which examined all these factors at the same time. This study …
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Laboratory and Field Evaluation of Performance-Engineered Stress Relief Courses in Nevada
Asphalt Concrete (AC) overlay is one of the most common technique used by Nevada Department of Transportation (NDOT) to maintain and repair aged and deteriorated flexible pavements in Nevada. A major challenge associated with overlays is the reflection of the cracks from the underlying pavement due …
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Assessment of highway condition using combined geophysical surveys
… penetrating radar (GPR) and Ultrasonic Surface Wave (USW). The objective of this research was to compare the effectiveness of two non-destructive geophysical tools, GPR and the PSPA, in assessing the condition of the pavements, composed of different construction materials. The GPR data were …
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Asphalt Perpetual Pavement Design: Utilizing Existing Pavement Systems in Ohio
This thesis explores asphalt perpetual pavement concepts by investigating existing asphalt concrete (AC) pavements in Ohio. In 2010, twenty AC pavement sites were selected as candidates for a forensic investigation in Ohio. Field distress surveys, coring, Falling Weight Deflectometer (FWD), Seismic …
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Cracking potential of short- and long-term aged binder with various levels of ABR
It is widely accepted that using reclaimed asphalt pavement (RAP) and recycled asphalt shingles (RAS) could improve the sustainability of asphalt concrete (AC), in terms of cost savings and environmental factors. This should be only valid when short- and long-term pavement performance are not …
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Development of Pavement Performance Evaluation Subroutines for 3D-Move Analysis Software
… the pavement performance of existing and new asphalt concrete (AC) pavements is an important and significant task of pavement engineers. It is important to quantifying the factors (material properties, environmental factors and traffic loading) that lead to the pavement deterioration. …
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Comparing Layer Types for the Use of MEPDG for FDR Design
… perform adequately. One way in which this can be accomplished is understanding how to best complete the structural design of FDR pavements. Because FDR is a combination of several different layers of material pulverized, mixed, stabilized and re-compacted, it does not fit neatly into any of these …
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Impact of waste plastics on asphalt concrete chemical and environmental characteristics
… which could be useful for application in asphalt concrete (AC) pavements. The objective of this study was to repurpose waste plastics in AC pavement, quantify the impact on its potential performance, and the environment. Chemical-and rheological-based tests were conducted to understand the …
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Evaluating the Mechanical Properties and Long-Term Performance of Stabilized Full-Depth Reclamation Base Materials
… from existing distressed pavements in place. There is, however, limited information on the long-term properties of these recycled materials. One important property, the elastic modulus, indicates the structural capacity of pavement materials and is highly recommended for design purposes …
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Towards fracture mechanics-based design of unbonded concrete overlay pavements.
An unbonded concrete overlay (UBCO) system is a Portland cement concrete (PCC) overlay that is separated from an existing PCC pavement by an asphalt concrete (AC) interlayer. It is an increasingly popular method for highway pavement rehabilitation. However, current UBCO design procedures are based …
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Evaluation of climate data sources and investigation of performance prediction models for mechanistic-empirical pavement designs
… (MEPDG), a novel procedure for pavement design practice, was developed under National Cooperative Highway Research Program (NCHRP) research study 1-37A. Subsequently, renamed as DarWin-ME in April 2011, and AASHTOWare Pavement ME design (PMED) in February 2013, this tool has been rapidly emerging …
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Evaluating the Mechanical Properties and Long-Term Performance of Stabilized Full-Depth Reclamation Base Materials
… from existing distressed pavements in place. There is, however, limited information on the long-term properties of these recycled materials. One important property, the elastic modulus, indicates the structural capacity of pavement materials and is highly recommended for design purposes …
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Digital Simulative Test of Asphalt Mixtures Using Finite Element Method and X-Ray Tomography Images
Simulative tests, such as asphalt pavement analyzer (APA), Hamberg rut tester etc. have been widely used to evaluate the performance of asphalt mixtures. However, simulative tests to evaluate the performance of the mixtures cannot give fundamental properties of Asphalt Concrete (AC) due to the …
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Cracking and Roughness of Asphalt Pavements Constructed Using Cement-Treated Base Materials
… base (CTB) that can lead to reflection cracking in asphalt surfaces. Cracking may then cause increased pavement roughness and lead to poor ride quality. The overall purpose of this research was to utilize data collected through the Long-Term Pavement Performance (LTPP) program to …
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Mechanistic-Empirical Evaluation of the Mn/ROAD Low-Volume Road Test Sections
… potential of a granular material can be characterized from rapid shear test at 15-psi confining pressure. The rapid shear test results at 15-psi confining pressure reflect the rutting trends observed in the field. There is no significant effect of granular material quality on the conventional …
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Impact of laboratory simulated aging on asphalt concrete flexibility
The aging of asphalt materials is considered an important factor contributing to the deterioration of asphalt concrete (AC) pavements. Asphalt binder aging is a combination of various complex mechanisms that affect its rheological properties causing AC to become stiffer and more brittle. As a …
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Development of GPR data analysis algorithms for predicting thin asphalt concrete overlay thickness and density
Thin asphalt concrete (AC) overlay is a commonly used asphalt pavement maintenance strategy. The thickness and density of thin AC overlay are important to achieving proper pavement performance, which can be evaluated using ground-penetrating radar (GPR). The traditional methods for predicting …
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Laboratory assessment of asphalt concrete durability utilizing balance mix design
… guarantee its durability. Better durability of asphalt concrete (AC) pavements would translate into less maintenance and repair, better ridership quality, and reduced environmental impacts. However, in the current design practice for AC materials, little attention is given to study AC …
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Nanomechanical characterization of asphalt
In this study, asphalt binder and asphalt concrete (AC) materials are characterized using laboratory nanoindentation testing and mechanical models. Traditionally, laboratory nanoindentation test data is analyzed using the Oliver-Pharr method to determine elastic modulus and hardness of materials. …
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