Asphalt binder is a widely used engineering material. It essentially nanomaterial with colloidal particles suspended in an oily medium. As asphalt ages, the are subject to fundamental physicochemical changes such as agglomeration, which translated into dramatic property of binder. In practices, organic rejuvenators often added aged binder, hope breaking down nanoparticles and restoring its orig...

The cold in-place recycling (CIPR) is a process where the existing bituminous pavement is recycled without application of heat. In CIPR process the scarified material from the existing pavement is crushed to the required gradation and binder in cold form (emulsion or cutback or foamed bitumen) is added. Externally acquired Reclaimed Bituminous Pavement (RBP) or fresh aggregates are also added d...

Abstract In recent years, the use of polyethylene (PE) for asphalt modification has been gaining increased attention due to environmental sustainability and cost-saving benefits. To optimize performance PE-asphalt blends, it is necessary understand polymer-binder interactions their impact on properties modified binder. this study, low-density (LDPE) with low high melt flow index (MFI), i.e., LD...

The performance of asphalt binders at high and low temperatures has an important role on the rutting and crackingresistance of asphalt pavements. Crumb Rubber Modified (CRM) is one of the asphalt modifiers that improves asphaltphysical and mechanical properties and helps reducing environmental pollution. In this research, three unmodifiedand six CRM modified binders were teste...

Hot mixed asphalt (HMA) is a mixture of particles (coarse and fine aggregates) interstitial fluid (asphalt binder) designed to compact harden for long-lasting roads. In this study, we implement two-scale approach capture the compaction behaviour hot mixtures using both granular-slurry rheology (GSR) at smaller scale discrete element method (DEM) simulation compactor. We show that modelling effo...

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...

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 ...