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A Laboratory Investigation on Long-Term Performance of Asphalt Concrete Treated with Antistripping Additives
Asphalt concrete pavement is susceptible to moisture damage and the damage caused by repeated freeze-thaw cycles is a major problem. This paper summarizes a laboratory investigation for...

Evaluation of Fine Aggregate Particle Shape and Texture
In an effort to minimize or eliminate permanent deformation (rutting) of heavy duty asphalt pavements most governing agencies now limit the amount of natural sand which generally (not...

Overview of Permeable Bases
Drainable pavement systems consist of: permeable base, separator lyer, and edgegrain system. This paper focuses on permable bases. A permeable base must provide both permeability and stability....

Performance of Recycled Asphalt Concrete Materials in an Arid Climate
Recycling of asphalt concrete pavement is a common practice for highway agencies. In 1981, the Arizona Department of Transportation (ADOT) constructed eight test sections in on experimental...

Physicochemical and Rheological Properties of Microwave Recyled Asphalt Binders
The purpose of this study was to analyze microwave recycled asphalt binders using Gel Permeation Chromatography (GPC), Fourier-Transform Infrared Spectroscopy (FTIR), and Dynamic Mechanical...

Fly Ash in Roller Compacted Concrete Pavement
This paper presents the state of practice on the use of fly ash in roller compacted concrete (RCC) pavements. Placed using asphalt pavers and compacted using asphalt rollers, RCC pavement...

Anatomy of Asphalt
Two main factors will combine over the next several years to alter the composition of asphalt pavements, which make up more than 90% of the paved roads in the U.S. First, a major research...

Flexible Pavement Distress Evaluation Using Image Analysis
A unique combination of image histogram and projection histogram are employed to classify major distress types on flexible pavement. This technique has taken into account the presence...

Pavement Design for the New Denver International Airport
Denver International Airport is the first new major U.S. airport in twenty years. Primary airfield elements in Phase I development include 5-12,000 foot runways and 1-16,000 foot runway,...

Asphaltic Concrete Performance Under High Pressure Tires
A study was conducted by the USAF Engineering and Services Laboratory to evaluate the rutting effects of high pressure tires on Marshall and gyratory designed pavements. Full scale pavement...

Modified Asphalt Binders for Military Airfield Pavements
This report documents a laboratory-based research effort to determine the effects of asphalt modifiers and alternate binders on asphalt airfield pavements. The modified binders were tested...

Aircraft Flexible Pavement Design in Australia
After World War Two, aircraft pavement design practice in Australia was largely developed from the work done by the U.S. Corps of Engineers. The C.B.R. pavement design method now differs...

Recycling Bituminous Runway Pavement into Aggregate Base Course
The paper discusses the development of recycling existing bituminous runway pavement by pulverizing into aggregate base course. To best explain the design, construction procedures and...

An Airfield Pavement Consultant System (AIRPACS) for Rehabilitation of Concrete Pavements
Airfield pavement knowledge captured by this research showed that knowledge-based techniques can be used to quickly select and design rehabilitation alternatives for a runway, taxiway...

Probabilistic and Reliability Analysis of Asphalt Concrete Airfield Pavements
A procedure was developed to analyze layered elastic asphaltic concrete airfield pavement systems in terms of probability and reliability. Rosenblueth method is used to estimate the expected...

MECHOD: A Mechanistic Overlay Design Program for Flexible Pavements
This paper presents a fully mechanistic asphalt overlay design procedure for use on microcomputers. The procedure is based on fundamental characteristics of pavement layer properties and...

Expert System for Flexible Pavement Management Using Lotus 1-2-3
The paper shows how a spreadsheet, LOTUS 1-2-3, can be used in developing expert systems without using any other software. The application program is for selecting a dominant maintenance...

Asphalt in the U.S. Transportation Infrastructure
Asphalt has been the major pavement material responsible for development of the transportation infrastructure enjoyed by American citizens. This paper addresses issues to be monitored...

Comparative Evaluation of 4-Inch and 6-Inch Diameter Specimens for Testing Large Stone Asphalt Mixes
Modified Marshall equipment and Gyratory Testing Machine (GTM) are now available for compacting and testing 6-inch diameter specimens to accommodate aggregate up to 2-inch maximum size....

Effects of Physicochemical Factors on Asphalt Aging
A new model for asphalt oxidative aging is presented. The model proposes that the kinetics of low temperature aging in the pavement temperature range is largely governed by physicochemical...

 

 

 

 

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