Polyphosphoric acid and plasticizer modified asphalt: Rheological properties and modification mechanism

Song, Rui; Sha, Aimin; Shi, Ke; Li, Jiarong; Li, Xinzhou; Zhang, Fan

doi:10.1016/j.conbuildmat.2021.125158

Cited by 42 publications

(16 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The viscosity of an asphalt binder increases after aging because SBSMA aging leads to the degradation of SBS and the hardening of the asphalt, and the thermal movement speed of the asphalt molecules slows down. The viscosity of asphalt decreases as the temperature rises since rising temperatures accelerate the thermal motion of asphalt molecules . When ESO was added to SBSPAV, the viscosity of 6E was restored to that of SBSMA.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Development on the Rheological Properties and Micromorphology of Active Reagent-Rejuvenated SBS-Modified Asphalt

Shi

et al. 2022

ACS Sustainable Chem. Eng.

Self Cite

View full text Add to dashboard Cite

This study aimed to improve the recycling efficiency of waste styrene−butadiene−styrene (SBS)-modified asphalt pavements and achieve sustainable road resource development. The SBS-modified asphalt aged in a pressure aging vessel (SBSPAV) was rejuvenated utilizing active reagents [i.e., methylene-bis(4-cyclohexylisocyanate) (HMDI) and 1,6-hexanediol diglycidyl ether (HDE)] and epoxy soybean oil (ESO). The HMDI type (HMDI combined with ESO) and HDE type (HDE combined with ESO) were used as rejuvenators. The rheological behavior of rejuvenated asphalt binders at medium and high temperatures was evaluated utilizing multiple stress creep recovery tests, linear amplitude sweep tests, and rotational viscosity tests. The high-temperature rutting resistance, medium-temperature fatigue resistance, and fluidity of the rejuvenated asphalt were evaluated. The micromorphology, roughness, and adhesion of the rejuvenated asphalt were evaluated by atomic force microscopy. The thermal stability of the rejuvenated asphalt was analyzed by thermogravimetric analysis. The results reveal that the HMDI-rejuvenated asphalt combines with the active hydrogen in SBSPAV to generate a stable chemical structure that benefits the rutting resistance and traffic load grade of the rejuvenated asphalt. Due to the increase in stiffness, the fatigue resistance of the HMDI-rejuvenated asphalt could be damaged to some extent. The residual epoxy functional groups in the HDE-rejuvenated asphalt are dispersed in the asphalt in an independent phase state, which reduces the elastic recovery ability. The stiffness of the rejuvenated asphalt is lowered because it has a more flexible structure. The anti-fatigue effectiveness of the HDE-rejuvenated asphalt is improved. HMDI can boost the intermolecular force of the rejuvenated asphalt while decreasing its temperature sensitivity. The viscosity of the rejuvenated asphalt gradually decreases as the HDE content increases. This occurs because HDE combines with SBSPAV to generate flexible segments, thereby increasing the flexibility of the asphalt colloids. HMDI and SBSPAV undergo a chemical reaction, which partially repairs the structure of SBS and inhibits the free diffusion of the asphalt molecules. The number of the HMDI-rejuvenated asphalt bee-like structures increases, while the volume drops and adhesion increases. The number and volume of the bee-like structures decreased and adhesion increased as the HDE content increased. This occurs because HDE contains a high concentration of light components, which minimizes the amount of asphaltene in SBSPAV. Thermogravimetric analysis tests show that the HDE-rejuvenated asphalt and HMDI-rejuvenated asphalt have good thermal stability.

show abstract

Section: Resultsmentioning

confidence: 99%

“…The viscosity of asphalt decreases as the temperature rises since rising temperatures accelerate the thermal motion of asphalt molecules. 38 When ESO was added to SBSPAV, the viscosity of 6E was restored to that of SBSMA. When ESO is paired with HMDI and applied to SBSPAV, some significant results can be obtained.…”

Section: Acs Sustainablementioning

confidence: 98%

Development on the Rheological Properties and Micromorphology of Active Reagent-Rejuvenated SBS-Modified Asphalt

Shi

et al. 2022

ACS Sustainable Chem. Eng.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Polynuclear clusters or polymers constructed exclusively by oxyanions of group VA, namely, [X m O y ] n z− (X = P III/V , As III/V , and Sb III/V ) are of central importance in a variety of strategic fields. 70−72 Polyphosphates, for example, have long been put to wide use in water treatment, 73 modified asphalt, 74 and food additives. 75 Meanwhile, polyantimonic acid and its derivatives can be harnessed for fire-proof materials, 76 ion exchangers, 77 and electrodes in Li-ion batteries.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Polynuclear clusters or polymers constructed exclusively by oxyanions of group VA, namely, [X m O y ] n z – (X = P III/V , As III/V , and Sb III/V ) are of central importance in a variety of strategic fields. − Polyphosphates, for example, have long been put to wide use in water treatment, modified asphalt, and food additives . Meanwhile, polyantimonic acid and its derivatives can be harnessed for fire-proof materials, ion exchangers, and electrodes in Li-ion batteries. , However, the development of As III/V -oxo clusters or polyarsenates(III/V) has been slower due to a lack of scientific research. , Beyond that, the structural evolution from monomeric oxyanions to condensed products noted above is still not well understood.…”

Section: Introductionmentioning

confidence: 99%

Space-Confined Nucleation of Semimetal-Oxo Clusters within a [H₇P₈W₄₈O₁₈₄]^33– Macrocycle: Synthesis, Structure, and Enhanced Proton Conductivity

et al. 2022

View full text Add to dashboard Cite

“…A cold resistant plasticizer, dioctyl adipate, has been shown to effectively decrease the glass transition temperature of a base asphalt and enhance the low-temperature crack resistance at the expense of reduced high-temperature performance [ 24 ]. Song et al demonstrated that adding a certain amount of polyphosphoric acid into the asphalts modified with plasticizers (dioctyl phthalate, and trioctyl trimelliate) improved the stiffness and elastic recovery properties without sacrificing the low-temperature performance [ 25 ]. Jamal et al reported that Cereclor (essentially a paraffin with a high percentage of chlorine) physically blended well with and significantly softened the aged asphalt [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

The Rejuvenating Potential of Plasticizers on Oxidatively Aged Asphalts: Rheological and Molecular Dynamics Perspectives

Cao

2022

Polymers

View full text Add to dashboard Cite

Recycle and reuse of waste asphalt materials in the pavement industry has brought tremendous contributions to the infrastructure sustainability and environmental preservation. The recent literature has suggested a great potential of plasticizers to be used for rejuvenating the oxidated paving asphalts. This study was aimed at assessing the rejuvenating effectiveness by rheological characterizations of two typical plasticizers, dibutyl phthalate (DBP) and tributyl citrate (TBC), selected based on the molecular structural differences. The underlying rejuvenating mechanisms were approached using molecular dynamics (MD) simulation, for probing the interactions between the plasticizers and oxidized asphaltenes and examining the outcomes in terms of deagglomeration. The results indicated that both plasticizers were highly effective in restoring the stiffness and elasticity properties as well as fatigue resistance of the aged asphalt. According to the simulations, the two plasticizers were able to deagglomerate the asphaltene associations. Owing to the high polarity and hydroxyl group, TBC appeared to be slightly more efficient in dissociating the asphaltenes, which explained its higher effectiveness in restoring the rheological properties as compared to DBP. Both the rheology and simulation results suggested that the plasticizers were rejuvenating instead of simply softening the aged asphalt.

show abstract

Polyphosphoric acid and plasticizer modified asphalt: Rheological properties and modification mechanism

Cited by 42 publications

References 41 publications

Development on the Rheological Properties and Micromorphology of Active Reagent-Rejuvenated SBS-Modified Asphalt

Development on the Rheological Properties and Micromorphology of Active Reagent-Rejuvenated SBS-Modified Asphalt

Space-Confined Nucleation of Semimetal-Oxo Clusters within a [H₇P₈W₄₈O₁₈₄]^33– Macrocycle: Synthesis, Structure, and Enhanced Proton Conductivity

The Rejuvenating Potential of Plasticizers on Oxidatively Aged Asphalts: Rheological and Molecular Dynamics Perspectives

Contact Info

Product

Resources

About

Polyphosphoric acid and plasticizer modified asphalt: Rheological properties and modification mechanism

Cited by 42 publications

References 41 publications

Development on the Rheological Properties and Micromorphology of Active Reagent-Rejuvenated SBS-Modified Asphalt

Development on the Rheological Properties and Micromorphology of Active Reagent-Rejuvenated SBS-Modified Asphalt

Space-Confined Nucleation of Semimetal-Oxo Clusters within a [H7P8W48O184]33– Macrocycle: Synthesis, Structure, and Enhanced Proton Conductivity

The Rejuvenating Potential of Plasticizers on Oxidatively Aged Asphalts: Rheological and Molecular Dynamics Perspectives

Contact Info

Product

Resources

About

Space-Confined Nucleation of Semimetal-Oxo Clusters within a [H₇P₈W₄₈O₁₈₄]^33– Macrocycle: Synthesis, Structure, and Enhanced Proton Conductivity