Use of tung oil as a rejuvenating agent in aged asphalt: Laboratory evaluations

Yan, Kezhen; Peng, Yang; You, Lihua

doi:10.1016/j.conbuildmat.2019.117783

Cited by 58 publications

(15 citation statements)

References 30 publications

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“…One is the four bio-rejuvenators with raw materials such as waste edible oil, tung oil, biodiesel, and fish oil residue labeled Bio-1, Bio-2, Bio-3, and Bio-4, respectively. Many studies involving regeneration and aging have discussed the improvement of the rheological properties of aged asphalt using these four regenerants; nevertheless, few studies have analyzed their fraction compositions [ 23 , 67 , 68 , 69 ].…”

Section: Methodsmentioning

confidence: 99%

Correlation Analysis between Mechanical Properties and Fractions Composition of Oil-Rejuvenated Asphalt

et al. 2022

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To clarify the intrinsic relationship between the mechanical properties of asphalt and its fraction composition, the SARA fraction composition and six macroscopic mechanical properties (critical cracking temperature (TCR), fatigue life (Nf), non-recoverable creep (Jnr3.2), penetration, ductility, and softening point) were investigated for 16 asphalt samples. Fraction contents of asphaltene and aromatic are strongly correlated with TCR and ductility (R2 > 0.92) that characterize the ability of asphalt to adapt to deformation at low and medium temperatures. Heavy fraction (asphaltene and resins) content is also strongly correlated with (R2 > 0.90) penetration and Jnr3.2 that characterize the resistance of the asphalt to overall deformation at medium and high temperatures. To express the changes in the four fractions simultaneously with one indicator, a statistic, average deviation of the fractions between the given asphalt and its original (marked σ), is introduced in this study to characterize the degree of asphalt aging based on the fraction changes. It normalizes the four simultaneous change indicators (percentage of SARA fractions) during asphalt aging into one indicator. This new indicator has a strong correlation with several mechanical performance indicators of asphalt, where it is strongly correlated with TCR (R2 > 0.90), ductility, and penetration, which are also well correlated with Jnr3.2 (R2 > 0.85), Nf (R2 > 0.75), and softening point (R2 > 0.75).

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Section: Methodsmentioning

confidence: 99%

Correlation Analysis between Mechanical Properties and Fractions Composition of Oil-Rejuvenated Asphalt

et al. 2022

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“…e wavelengths at 811 cm −1 and 724 cm −1 are caused by C-H bending vibration and C-O-S symmetrical stretching on the benzene ring [39,40].…”

Section: Fourier Transform Infrared Reflection (Ftir)mentioning

confidence: 99%

Study on Conventional and Rheological Properties of Corn Stalk Bioasphalt/PPA Composite Modified Asphalt

Wang¹,

Huang

Xin³

et al. 2021

Advances in Civil Engineering

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As a new type of pavement material, bioasphalt has received more and more attention. However, the high-temperature behavior of bioasphalt is poor after blending with asphalt binder. In order to solve this problem and facilitate the waste utilization and resource conservation, the corn stalk bioasphalt/PPA composite modified asphalt was proposed. The conventional performance tests and rheological tests were conducted to evaluate high-temperature and low-temperature behavior. Fourier transform infrared reflection (FTIR) test was undertaken to analyze the mechanism of modified asphalt. The results indicated that blended asphalt penetration and ductility gradually decrease with the PPA content increasing. The softening point and viscosity of the modified asphalt increased, which led to an improvement of blended asphalt’s rigidity. The PPA increased the rutting index of corn stalk bioasphalt/PPA composite modified asphalt. However, bioasphalt had a negative effect on its high-temperature performance. The corn stalk bioasphalt/PPA composite modified asphalt could meet the specification requirement at −18°C considering the creep rate and stiffness modulus, indicating it had outstanding crack resistance. When the PPA and bioasphalt respect to the weight of neat asphalt were 6%–8% and 10%–16%, respectively, the corn stalk bioasphalt/PPA composite modified asphalt performance was optimal. However, shear time and shear rate merely affected the proposed modified asphalt performance. The bioasphalt did not affect the chemical structure of asphalt. However, PPA generated new functional groups (P-O single bond, phosphate (RO)3P = O, and P=O double bond) causing a chemical modification in the asphalt binder. This study can provide a basis for applying bioasphalt, making road engineering more economical and environmentally friendly.

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“…Nevertheless, under the influence of thermal-oxidative aging, ultraviolet aging, and water damage during the construction and service of pavements, the properties of SBS-modified bitumen (SMB) are gradually deteriorated, which further result in cracking, rutting, and spalling of the pavement, − and these pavement diseases seriously threaten the driver safety and shorten the service life of pavements. , During the maintenance and renovation of damaged pavements, a great quantity of waste bitumen mixtures are produced . Also, the waste mixtures not only pollute the environment and occupy the land but also squander a lot of nonrenewable resources (aggregates and bitumen). − If waste bitumen mixtures can be recycled for new pavement construction, it will significantly reduce resource consumption and production costs . Therefore, high-quality recycling of waste bitumen mixtures has turned into the focus of researchers in the road field all over the world.…”

Section: Introductionmentioning

confidence: 99%

Effects of Reactive Chain Extension Rejuvenation Systems on the Viscosity–Temperature Characteristics, Rheological Properties, and Morphology of Aged Styrene–Butadiene–Styrene-Modified Bitumen

Han

Mao

et al. 2021

ACS Sustainable Chem. Eng.

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In this study, the reactive chain extension rejuvenators (RCERs) and aromatic hydrocarbon oil (AHO) were applied to construct the reactive chain extension rejuvenation systems (RCERs-AHO), and the effect of RCERs-AHO on the viscosity–temperature characteristics, rheological properties, and morphology of aged styrene–butadiene–styrene (SBS)-modified bitumen (ASMB) was thoroughly studied. Meanwhile, the rejuvenation effect of RCERs-AHO and TDI/HDI-AHO (toluene-2, 4-diisocyanate/hexamethylene diisocyanate and AHO) on ASMB was compared. The results indicated that the RCERs-AHO were more effective in restoring the viscosity of ASMB compared with TDI/HDI-AHO. The critical temperatures of the rutting factor at G*/sinδ = 1.0 kPa of rejuvenated SBS-modified bitumen (RSMB) regenerated by RCERs-AHO were higher than those of RSMB rejuvenated by TDI/HDI-AHO, revealing that RCERs-AHO could better increase the high-temperature rutting resistance of RSMB. Also, the low-temperature cracking resistance of RSMB was obviously enhanced by RCERs-AHO in comparison with TDI/HDI-AHO. The results of the average recovery rate of RSMB revealed that RCERs-AHO could better enhance the deformation recovery ability of RSMB. In addition, fluorescence morphology images clearly indicated that RCERs-AHO could better reconstruct the cross-linking structures of aged SBS compared with TDI/HDI-AHO. The comprehensive analysis of the research results showed that RCERs-AHO could efficiently restore the performances of ASMB to the level of fresh SBS-modified bitumen, and the rejuvenation ability of RCERs-AHO was more obviously excellent than TDI/HDI-AHO.

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Use of tung oil as a rejuvenating agent in aged asphalt: Laboratory evaluations

Cited by 58 publications

References 30 publications

Correlation Analysis between Mechanical Properties and Fractions Composition of Oil-Rejuvenated Asphalt

Correlation Analysis between Mechanical Properties and Fractions Composition of Oil-Rejuvenated Asphalt

Study on Conventional and Rheological Properties of Corn Stalk Bioasphalt/PPA Composite Modified Asphalt

Effects of Reactive Chain Extension Rejuvenation Systems on the Viscosity–Temperature Characteristics, Rheological Properties, and Morphology of Aged Styrene–Butadiene–Styrene-Modified Bitumen

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