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

Gao, Lining; Cai, Nana; Fu, Xiao-Hong; He, Rui; Zhang, Honggang; Zhou, Jinyun; Kuang, Dongliang; Liu, Shaowen

doi:10.1155/2021/6628778

Cited by 9 publications

(9 citation statements)

References 24 publications

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“…Therefore, for a clean manufacture of rubberised bituminous mix, the manufacturing temperature should be reduced without sacrificing mechanical performance. For this reason, a wide range of additives that can increase distinct characteristics of bitumen and work in diverse ways have been utilised in rubberised bitumen modification, such as PPA, Evotherm, MPP, TMQ and sulphur, which were identified as co-modifiers [4,12,22,23,30,33,34].…”

Section: Type Of Additives and Their Methods Of Applicationmentioning

confidence: 99%

“…NR has two main types: natural rubber latex (NRL) and a new type of NR known as cup lump natural rubber (CLNR) (Figure 1), which is produced when latex is allowed to coagulate under bacterial attack [12,13]. NRL polymer can be used as a modifier to enhance bitumen's physical qualities, such as increasing the softening point, reducing penetration while enhancing the penetration index, and improving the properties of shortand long-term ageing [3,14,15].…”

Section: Natural Rubber As a Bitumen Modifiermentioning

confidence: 99%

“…In practice, the solvent evaporation behaviour makes it less prominent in modified bitumen, which keeps the bitumen characteristics from being significantly disrupted. Studies have examined the interaction of rubber with aromatic hydrocarbons as a chemical solvent for surface treatment, and rubber swelling to alter its shape as a sticky material [12,27]. According to previous studies, a combination of evaporation-prone chemical solvents such as toluene and xylene can be used as a rubber solvent.…”

Section: Treatment Of Cup Lumpmentioning

confidence: 99%

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Potential Additives in Natural Rubber-Modified Bitumen: A Review

et al. 2023

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Conventional bitumen pavement is no longer suitable for handling increasing loads and weather variations, which cause road deterioration, Thus, the modification of bitumen has been suggested to counter this issue. This study provides a detailed assessment of various additives for modifying natural rubber-modified bitumen used in road construction. This work will focus on the use of additives with cup lump natural rubber (CLNR), which has recently started to gain attention among researchers, especially in rubber-producing countries such as Malaysia, Thailand and Indonesia. Furthermore, this paper aims to briefly review how the addition of additives or modifiers helps elevate the performance of bitumen by highlighting the significant properties of modified bitumen after the addition of modifiers. Moreover, the amount and method of application of each additive are discussed further to obtain the optimum value for future implementation. On the basis of past studies, this paper will review the utilisation of several types of additives, including polyphosphoric acid, Evotherm, mangosteen powder, trimethyl-quinoline and sulphur, and the application of xylene and toluene to ensure the homogeneity of the rubberised bitumen. Numerous studies were conducted to verify the performance of various types and compositions of additives, particularly in terms of physical and rheological properties. In general, additives enhance the properties of conventional bitumen. Future research should investigate CLNR because studies on its utilisation are limited.

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Section: Type Of Additives and Their Methods Of Applicationmentioning

confidence: 99%

Section: Natural Rubber As a Bitumen Modifiermentioning

confidence: 99%

Section: Treatment Of Cup Lumpmentioning

confidence: 99%

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Potential Additives in Natural Rubber-Modified Bitumen: A Review

et al. 2023

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“…From the micro perspective, PPA is found to significantly improve the adhesion ability, high temperature elasticity, and rutting resistance of SBRMA through reverse flocculation; the incorporation of PPA also reduces the size of the polymer dispersed phase, which forms a more ideal microstructure and significantly enhances the compatibility of SBR and asphalt [ 19 ]. In regard to the mechanism of PPA improving the thermal oxygen aging resistance of asphalt, it has been suggested that PPA causes a gelation effect on asphalt and can disperse agglomerates of asphaltene micelles, which significantly reduces the impact of aging on the asphalt properties [ 20 , 21 ]. In addition, Han et al [ 22 ] argued that a chemical reaction between PPA and the reactive groups in SBS-modified asphalt resulted in a tighter cross-linked network structure of the SBS-modified asphalt.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the Effects of Polyphosphoric Acid (PPA) on the Anti-Ultraviolet Aging Properties of SBR-Modified Asphalt

Niu

Zhu

et al. 2023

Materials

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The ultraviolet (UV) aging of asphalt is an important factor affecting the long-term performance of asphalt pavement, especially in high altitude cold regions. The current studies have reported that styrene butadiene rubber-modified asphalt (SBRMA) has a good cracking resistance at low temperatures. In addition, polyphosphoric acid (PPA) is an effective modifier that can enhance the anti-UV aging properties of asphalt. However, the understanding of the improvement mechanism of PPA on the anti-aging of SBRMA remains unclear. Therefore, this study aimed to evaluate the effect of PPA on the UV aging resistance of SBRMA. The rheological properties of PEN90 asphalt(90#A), SBRMA, and PPA/SBR modified (PPA/SBR-MA) before and after UV aging were evaluated by dynamic shear rheometer (DSR) and bending beam rheometer (BBR) tests. The molecular weight and chemical structure of 90#A, SBRMA, and PPA/SBR-MA were determined by Fourier transform infrared spectroscopy (FTIR) and gel permeation chromatography (GPC), and the interaction and modification mechanism of the modifiers were analyzed. The rheological analysis shows that the high and low temperature performances of SBRMA are improved by adding PPA, and PPA also significantly reduces the sensitivity of SBRMA to UV aging. The microscopic test results show that PPA has a complex chemical reaction with SBRMA, which results in changes in its molecular structure. This condition enhances SBRMA with a more stable dispersion system, inhibits the degradation of the polymer macromolecules of the SBR modifier, and slows down the aging process of base asphalt. In general, PPA can significantly improve the anti-UV aging performance of SBRMA. The Pearson correlations between the aging indexes of the macro and micro properties are also significant. In summary, PPA/SBRMA material is more suitable for high altitude cold regions than SBRMA, which provides a reference for selecting and designing asphalt pavement materials in high altitude cold regions.

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“…Rutting, a permanent deformation in the wheel path brought on by traffic loads, is more prevalent during hotter months [14]. When choosing pavement materials, high-performance bitumen with hightemperature stability should be taken into consideration to reduce pavement rutting and extend the service life of bitumen pavement [15].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Modified Asphalt Binder and Mixtures with Polyphosphoric Acid

Hilal

2023

NJES

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Rutting is the most common distress that most Iraqi asphalt pavements suffer from it. Asphalt binders are modified by using additives and polymers to enhance their physical qualities and fulfill the performance demands. Polyphosphoric acid (PPA) has been used in many countries to enhance the physical and mechanical characteristics of asphalt binders and mixtures that can improve the performance of asphalt pavements. In this paper, evaluation of the Iraqi asphalt binder and mixtures performance by using three percentages of Polyphosphoric acid (PPA) (0.4, 0.8, and 1.2) percent by asphalt binder weight and added to (60-70) penetration grade asphalt binder to show the applicability and suitability of using PPA in asphalt pavement in Iraq. Original asphalt binder and modified are subjected to traditional tests which are penetration, ductility, softening point, and viscosity. Results show better performance and enhancement of the physical properties of the modified binder. Other tests are Marshall Stability and wheel track tests. The results of the addition of PPA to the asphalt mixture show increases in the Marshall Stability and enhance the performance of the asphalt pavement mixtures. The wheel track test is applied to the original and modified mixture at two test temperatures 40 ?C and 50 ?C and the results show a decrease in the rut depth when the percentages of PPA increase. It is concluded that %PPA addition will enhance the performance of the Iraqi asphalt pavement and the mixture will be more rutting resistant, especially in high-temperature weather.

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

Cited by 9 publications

References 24 publications

Potential Additives in Natural Rubber-Modified Bitumen: A Review

Potential Additives in Natural Rubber-Modified Bitumen: A Review

Evaluating the Effects of Polyphosphoric Acid (PPA) on the Anti-Ultraviolet Aging Properties of SBR-Modified Asphalt

Evaluation of Modified Asphalt Binder and Mixtures with Polyphosphoric Acid

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