Experimental Study on Polyphosphoric Acid (PPA) Modified Asphalt Binders

Cao, Wei; Liu, Shu Tang; Mao, Hong Lu

doi:10.4028/www.scientific.net/amr.152-153.288

Cited by 11 publications

(6 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…e phase angle decrease is due to the fact that PPA made the corn stalk bioasphalt/PPA composite modified asphalt more elastic. e phase angle decrease shows that it increases the asphalt's rebound rate under load, thereby improving the asphalt's high-temperature stability [33,34].…”

Section: Temperature Scanningmentioning

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

View full text Add to dashboard Cite

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.

show abstract

Section: Temperature Scanningmentioning

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

View full text Add to dashboard Cite

show abstract

“…A developed liquid anti-aging agent, which was used for the anti-aging of asphalt binder in an original sample, consisted of oil antioxidant, polyphosphoric acid (PPA) and SBS-modified asphalt binder. These three components effectively inhibited the oxidation reaction of asphalt binder in service through synergistic effects [17]. An oil antioxidant mainly provides anti-aging properties, which significantly improves the low-temperature performance and fatigue anti-cracking properties of virgin asphalt binder.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Anti-Aging Effect of Asphalt Binder Liquid Anti-Aging Agent

Fu,

Wang,

Song

et al. 2024

Buildings

View full text Add to dashboard Cite

During its service life, asphalt pavement is affected by environmental factors such as heat, light, oxygen and moisture. The asphalt binder ages, resulting in a decrease in the performance of the asphalt pavement. Therefore, the development and application of an asphalt anti-aging agent is of great significance. In this paper, the road performance of the developed asphalt binder liquid anti-aging agent was verified in the two scales of asphalt binder and asphalt mixture, respectively. Firstly, a simple aging test method was proposed using needle penetration as the evaluation index. The aging time of the simple aging method was determined to be 20 h. Secondly, the addition of anti-aging agents improved the low-temperature performance of the asphalt binder and had a less adverse effect on the high-temperature performance. The test values of needle penetration and the ductility of the asphalt binder increased and the values of the softening point decreased. And the road performance of the anti-aging asphalt mixture basically met the specification requirements. The addition of the anti-aging agent improved the low-temperature performance of the aged asphalt mixture by 16%, which is of great significance for improving the service life of asphalt pavement.

show abstract

“…Baldino et al [10] found that the glass transition temperature decreased when PPA was mixed into asphalt, which could improve the stiffness, thus improving the low-temperature performance. However, Cao et al [11] obtained conflicting conclusions that PPA can reduce low-temperature performance, and it is proved by Cao et al [12] that PPA has little impact on its low-temperature performance.…”

Section: Introductionmentioning

confidence: 99%

Influence of PPA on the Short‐Term Antiaging Performance of Asphalt

Gao

Cai

et al. 2021

Advances in Civil Engineering

View full text Add to dashboard Cite

It has been confirmed that polyphosphoric acid (PPA) can significantly improve the high-temperature resistance, storage stability, and aging resistance of asphalt. The low price of PPA is conducive to the development of modified asphalt with high performance and excellent economy, suggesting its great application prospects. At present, there is little research on the role of PPA in delaying the aging process of PPA-modified asphalt, and a consensus has not yet been reached. Therefore, PPA-modified asphalt with different blending amounts (0 wt%, 0.4 wt%, 0.8 wt%, and 1.2 wt%) was prepared in this study. On the basis of variable performance, the role of PPA in the short-term antiaging process of asphalt is analyzed through Fourier transform infrared spectroscopy (FTIR) analysis of PPA-modified asphalt before and after aging, combined with the analysis of the change in components. The results showed that after PPA addition, the high-temperature resistance and the thermal stability of asphalt were improved and the temperature sensitivity was weakened. Both curves of ductility and G ∗ indicate the potential saturation effect of PPA addition; together with infrared spectroscopy, we proved that there are both chemical reactions and physical mixing in the PPA-modified asphalt. The component fractions show that PPA will cause the asphalt to transform from sol to gel and the main function of PPA in retarding asphalt aging is the dispersion of the agglomerates of asphaltene micelles by PPA.

show abstract

Experimental Study on Polyphosphoric Acid (PPA) Modified Asphalt Binders

Cited by 11 publications

References 2 publications

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

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

Experimental Study on Anti-Aging Effect of Asphalt Binder Liquid Anti-Aging Agent

Influence of PPA on the Short‐Term Antiaging Performance of Asphalt

Contact Info

Product

Resources

About