Oxidative aging causes major changes in asphalt binder's physiochemical and rheological properties, giving rise to pavement distress failure. Asphalt occurs due two main processes: a loss of volatile components reduction the malthene phase oxidation certain functional groups asphalt, increasing concentration asphalt's polar components. Performing SARA (saturate, aromatic, resin, asphaltene) analysis FTIR (Fourier transform infrared) spectroscopy on crude oil shows that ratio nonpolar ones is...

The overall national emphasis on sustainability in pavement construction has led to the promotion of recycled materials such as reclaimed asphalt (RAP) and shingles. In general, inclusion these reduced performance at low temperatures leading thermal cracking. Previous research by authors showed that application bio-binder from swine manure could alleviate effect RAP while improving temperature bulk viscoelastic fracture properties mixture. current paper expands previous bio-modified mixtures...

The sustainability movement in paving materials has led to the increased use of reclaimed asphalt pavement (RAP). New developments this area recent past include biomodified binders (BMBs) such as those containing bio-oils derived from swine manure. study reported paper examined low-temperature properties RAP and virgin BMB mixtures determine if these exhibited better performance than conventional hot-mix (HMA). Disk-shaped compact tension [DC(T)], Superpave ® indirect (IDT), acoustic...

This paper investigates the feasibility of application scrap tire and swine manure to produce a sustainable alternative for bituminous asphalt used in pavement construction. Biobinder is produced from by using thermochemical conversion process; biobinder then blended with crumb rubber binder (PG 64-22) biomodified (BMR) asphalt. In addition offering renewable petroleum-based binder, BMR can be hybrid environmental solution management tire. To study merit industry, this compares rheological...

Asphalt industry has been looking to reduce their dependence on petroleum-based binders and apply non-petroleum as partial or full replacement for asphalt binders. This motivated several attempts by researchers produce bio-modified asphalts from various materials including woody biomass, waste cooking oil, bio-oil animal manure. Accordingly, have made incorporate bio-oils/bio-binders (BBs) these feedstocks mainly replacements asphalt. However, this effort found be challenging due the high...

The use of reclaimed asphalt pavement (RAP) in neat mixtures has received significant attention because its economic and environmental advantages. However, bitumen contained RAP is severely aged; when blended with virgin at a high percentage, it can negatively affect the properties resulting blend. Therefore, recycling agents have been used to improve aged consequently performance mixture. This paper uses computational modeling laboratory experiments examine role chemical structure...

This paper examines the effect of oxidation asphaltene molecules on overall polydispersity and rheology a bituminous matrix. The research hypothesis is that increases bitumen polydispersity; it further hypothesized increased leads to reduction in crossover modulus viscosity To test this hypothesis, laboratory experiments combined with molecular dynamics simulations were used examine properties samples containing different concentrations oxidized asphaltenes. prepare samples, was initially...

The application of crumb rubber in the asphalt industry has demonstrated many advantages pavement, yet challenges associated with its pavement construction have limited usage. In this study, Bio-Binder was used as an additive for crumb-rubber-modified (CRM) binder to enhance rheological properties while improving workability and reducing segregation. product produced by adding CRM is called Bio-Modified-Rubber (BMR) binder. Rheological studies showed a reduction mixing compacting...

Asphalt binder supplies are shrinking, while the demand for it is increasing rapidly; this in turn has led to an increase price of asphalt. As asphalt increases, alternative and renewable resources increases. Therefore, paper investigates effects introduction four different bio-binders (made from Corn Stover, Miscanthus Pellet, Swine Manure, Wood Pellet) on aging susceptibility as measured by change rheological chemical properties a selected (PG64-22) result oxidative aging. The results...

The modified performance of bio-modified asphalt-binder is attributed to the alteration intermolecular interactions between units asphaltene stacks exposed bio-additive.

Rubber modification of asphalt is one the most common modifications used to improve rheological properties; in such applications, rubber mainly introduced matrix as a solid particulate matter and referred crumb (CR) via wet or dry processing. However, application CR particles can cause challenges phase separation segregation within matrix. Accordingly, this paper investigates feasibility liquid (LR) produced through vacuum pyrolysis scrap tyre an modifier. The LR recovered from after its...

Introduction of various organic and inorganic modifiers to bitumen has been commonly practiced mainly upgrade the performance its sustainable properties; polyphosphoric acid (PPA) nanosilica are among such modifiers. Here, we study synergy between silica nanoparticles PPA increase effectiveness modify bitumen. We further examine plausible antagonistic effects bitumen's wax content on synergistic features silica–PPA. Our density functional (DFT) results energy decomposition analysis (EDA)...