Growing use of recycled asphalt materials in pavement means the current volumetric-based Superpave mixture design may not address durability concerns arising from replacement a proportion virgin binder with ones. To this limitation, performance-based testing is introduced to supplement conventional volumetric assessing cracking performance mixtures. Louisiana Department Transportation and Devel...

Over the past decade, the Texas Department of Transportation (TxDOT) focused research efforts on improving hot mix asphalt concrete (HMAC) mix design to preclude rutting in the early life of pavements. However, these rut-resistant stiff mixtures may be susceptible to long-term fatigue cracking due to oxidative aging. This project completed initial development of an HMAC mixture fatigue design a...

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...

Newer technologies such as warm mix asphalt (WMA) and reclaimed pavement (RAP) have gained international approval been considered appropriate solutions that support the sustainability goals of highway sector. However, both present some shortcomings. The lower mixing compaction temperatures WMA reduce binder aging bond between aggregates coating binder, thus resulting in less rutting resistance ...

Components of road surface degradation are common constituents of urban runoff. Studies conducted in Europe have indicated that as much as 0.05-0. 10 inch of pavement surface is worn away from the roadway each year. The largest component of street pavement is the aggregate material itself, with additional smaller quantities originating from the asphalt binder, fillers and substances applied to ...

The recycling of road and airport asphalt pavements requires greater reliability mix design in order to ensure proper rehabilitation effective reuse recycled concrete. Currently, internationally, the most procedures for concrete with RAP (Reclaimed Asphalt Pavement) refer guidelines developed by SuPerPave® Mixtures Expert Task Group. In this paper, according requirements European standard EN 13...

Additives are widely used to enhance the rheological and performance properties of asphalt binder satisfy demands extreme loading climatic conditions. Meanwhile, adding complexity behaviour that requires more time, effort, material resources during laboratory work. The purpose this research was use Artificial Neural Networks (ANNs) predict recovery (R) nonrecoverable compliance (Jnr) based on m...

Abstract This research aims to assess the properties of Polymer Modified Bitumen (PMB) binder prepared with different types additives such as (Waste low density polyethylene (W-LDPE) and crumb rubbers (CR)and Styrene Butadiene (SBS)). Most these are sustainable materials since it is derived from old scrap materials. All above-mentioned (W-LDPE, CR SBS) were added percentages (2, 4, 6 percentage...

Limited studies in recent years have shown that asphalt pavement subject to seawater in coastal regions or deicing salt in cold regions may be seriously damaged after being soaked in saline water for a long time. However, there is limited research into the influence of salt on rheological properties of asphalt after long-term aging. In this study, rheological properties of unmodified and polyme...