This work presents a theoretical/numerical study of the micromechanical behavior of asphalt concrete. Asphalt is a heterogeneous material composed of aggregates, binder cement and air voids. The load carrying behavior of such a material is strongly related to the local load transfer between aggregate particles, and this is taken as the microstructural response. Numerical simulation of this mate...

Korea Train eXpress (KTX) is now being operated, which allows Korea being one of the countries that operates the high-speed rail system. The high-speed rail has its advantage of short time transportation of population and materials, which lead to many researches performed in this matter. In the case of high speed classical trackbed system, the maintenance and usability of gravel ballast system ...

Many rural highways in Atlantic Canada are in poor condition due to limited maintenance funding available. The typical maintenance strategy has been to place an overlay on the damaged asphalt concrete layer to provide a new wearing surface, but this approach does not repair the damage embedded within the pavement structure. After a certain period of time, the original cracks reflect through the...

An optimal scheme of road paving maintenance was investigated by examining the environmental loading and cost considerations of pavement operations over a 30-year life cycle. Results indicated that the application of recycled materials in pavement construction and repair reduced the effects of environmental loading over the life cycle by approximately 40%. Furthermore, it was observed that envi...

The objective of this study is to evaluate the rheological properties and chemical bonding of nano-modified asphalt binders blended with nanosilica. In this study, the nanosilica was added to the control asphalt at contents of 4% and 6% based on the weight of asphalt binders. Superpave binder and mixture tests were utilized in this study to estimate the characteristics of the nano-modifed aspha...

Techniques of wave propagation in layered plates are used to evaluate the integrity and the material properties of the asphalt covered concrete deck of a bridge. Seismic waves are generated on the field by a point impact load, which is studied in detail, and surface motions are recorded at four stations forming a single line with the impact location. In order to simplify the problem and to lay ...

Weak bonding between layers of pavement leads to damages on the composite pavement. Bonding plays an important role in the durability and maintenance of composite pavement layers. The present study evaluates the factors effective in bond strength of the interface between concrete and asphalt pavements. The factors considered for this purpose include steel slag percentage in the concrete pavemen...

The article reviews the option of how to make top pavement asphalt-concrete mixture adhere reliably base, which is underlying cement-concrete coating. bitumen-latex emulsion suggested as a binder for two layers.