The aging of asphalt concrete is mainly governed by the binder, which a naturally occurring organic hydrocarbon. Both chemical and rheological properties binder are expected to change as continues. pavement industry increasing use different recycled materials in construction rehabilitation flexible pavements preserve natural resources, save costs, reduce environmental emissions. aged from alter...

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...

A historical cohort study was conducted to study the possible risk of cancer associated with exposure to asphalt. Altogether 1320 unskilled workers employed in the asphalt industry were followed up over a ten year period and compared with 43,024 unskilled men in terms of cause specific mortality. Both groups were identified from census records and followed up by an automatic record link that ha...

The rejuvenation of epoxy modified bituminous binders is a topic much debate because such may not be able to melt at high temperatures and restore their properties using recycling agents. This paper presents the results an experimental program developed evaluate re-usability bitumen, or by three agents: aromatic-based agent, aliphatic-based soft binder. impact these agents on response aged was ...

Lignin is a major waste product of biofuel and paper industries that can be used as modifier to improve the relevant properties asphalt. To investigate effect lignin formic acid wood incorporations into asphalt on binder was unaged aged for 85 min, 5 h, 10 series tests were conducted, including high- low-temperature rheological by dynamic shear rheometer (DSR), followed Fourier transform infrar...

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...