Imad L. Al-Qadi

TL;DR: In this paper, the authors developed a tire-pavement interaction model to predict the three-dimensional (3D) contact stresses under various loads and inflation pressures, where an air-inflated radial-ply ribbed tire was loaded on a non-deformable pavement surface.

TL;DR: In this paper, a study that validated the field performance of ground-penetrating radar (GPR) as a nondestructive tool to predict in situ asphalt mixture density is presented.

TL;DR: In this paper, the ground-penetrating radar (GPR) is used for quality assurance and quality control during flexible pavement compaction and after construction and the results of a study on the effect of surface water on the GPR signal when a 2-GHz antenna is used.

TL;DR: In this article, an approach to life-cycle assessment (LCA) for pavement construction applications was discussed, which included material production and construction phases pertaining to the upper layers of pavement; the aim was to quantify energy consumption and greenhouse gases.

Abstract: One of the critical components of the U.S. civil infrastructure, bridges, has rapidly deteriorated in the past two decades and is in need of maintenance and rehabilitation. Geosynthetics may have the potential to provide a long-term solution to some of the problems that are present in these bridges, mainly, chloride intrusion into bridge decks. When installed properly, geosynthetics can act as both a moisture barrier and a stress absorption layer. However, the tack coat application rate is critical, as an excessive amount can cause eventual slippage, whereas too little may result in debonding. A new geocomposite membrane that comprises a low-modulus polyvinyl chloride layer sandwiched between two layers of nonwoven geotextile has recently been introduced for use in highway systems for water impermeation and strain energy absorption. A laboratory testing program was conducted to determine the optimum asphalt binder tack coat application rate that needs to be applied in the field. To accomplish this, a fixt...