Asphalt pavement recycling has grown dramatically over the last few years as the preferred way to rehabilitate existing asphalt pavements. Rehabilitation of existing asphalt pavements has employed different techniques; one of them, cold in-place recycling with foamed asphalt (CIR-foam), has been effectively applied in Iowa. However, Iowa’s current cold in-place recycling (CIR) practice utilizes...

Huge quantities of bituminous mix in the form of seal coats and HMAC thin overlays are applied by the TxDOT every year to improve ride quality and seal existing cracks, but these measures do not correct possible underlying weaknesses that will cause roughness or distress to quickly reappear. As a result, the overall pavement condition keeps deteriorating due to the structural deformation of pav...

Weigh-in-Motion systems are tools to prevent road pavements from the adverse phenomena of vehicle overloading. However, the effectiveness of these systems can be significantly increased by improving weighing accuracy, which is now insufficient for direct enforcement of overloaded vehicles. Field tests show that the accuracy of Weigh-in-Motion axle load sensors installed in the flexible (asphalt...

The National Airport Pavement Test Facility (NAPTF) was constructed to generate full-scale testing data to investigate the performance of airport pavements subjected to complex gear loading configurations of new generation aircraft. During the first test program, the NAPTF test sections were simultaneously subjected to Boeing 777 trafficking in one lane and Boeing 747 trafficking in another lan...

We conduct an empirical comparison of nine representative statistical pavement performance models, which have been estimated using serviceability data from the AASHO Road Test. The purpose of the study is to understand the effect of different statistical assumptions and estimation techniques on the models’ predictive capabilities. The study consists of using the models to predict the serviceabi...

Class C fly ash is a coal combustion product normally produced from lignite or subbituminous coal obtained as a result of the power generation process. In recent years, efforts were taken to incorporate self-cementing fly ash into full-depth reclaimed (FDR) asphalt pavements to improve the structural capacity of asphalt pavement base layers. In this study, an existing asphalt pavement in County...

The phenomenon of urban heat islands is mainly caused by the increase artificially hardened surfaces in cities, and it can be alleviated using permeable pavements to dissipate latent heat. There are many disagreements on cooling effect pavements, at present, still needs more tests modeling prove this view. This paper proposes a 3-D transient model based transfer theory porous media accurately e...

Rough pavements cause ride discomfort and energy inefficiency for road vehicles. Existing methods to address these problems are time-consuming not adaptive changing driving conditions on rough pavements. With the development of sensor communication technologies, crowdsourced dynamic traffic information become available enhancing performance, particularly addressing issues by controlling speeds....

Pavements occupy about 40% of urban land cover, with 75–80% black top roads, playing a critical role in connectivity and mobility. Solar energy is absorbed stored pavements leading to an increase surface temperatures. Decreasing green cover further contributing rise regional Due this activity, the city experiences heat island (UHI). This study presents review literature on mitigation measures c...

PROBLEM STATEMENT When designing and evaluating asphalt pavements, engineers must have an understanding of how the pavement materials will react to the stresses and strains of vehicle loads at varying temperatures. When a load is applied to asphalt concrete at a certain temperature, to what degree will the pavement "bounce back" to its original height? Pavement designers predict this spring-lik...