Evaluation of the self-healing performance of polyurethane-modified bitumen using bitumen bond strength (BBS) test and CT scan

Kazemi, Mohammadjavad; Goli, Ahmad; Nasimifar, Mahdi

doi:10.1007/s42947-020-0064-6

Cited by 14 publications

(8 citation statements)

References 23 publications

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“…In addition, the blend of toluene with rubber and bitumen produced a stable and homogeneous mixture [9], as confirmed by Kazemi et al [79]. They concluded that the addition of toluene strengthened the bitumen self-healing capacity and that increasing the polymer concentration intensified this enhancement [79]. When rubber additives are subjected to high temperatures during bulk storage, toluene helps rubber retain its asphaltic compounds [28].…”

Section: Xylene and Toluenementioning

confidence: 75%

“…The solvent can contribute to the dissolution or aggregation of the bitumen with the heaviest or most polar molecules, leading to a less viscous bitumen depending on its type [78]. In addition, the blend of toluene with rubber and bitumen produced a stable and homogeneous mixture [9], as confirmed by Kazemi et al [79]. They concluded that the addition of toluene strengthened the bitumen self-healing capacity and that increasing the polymer concentration intensified this enhancement [79].…”

Section: Xylene and Toluenementioning

confidence: 87%

“…The softening point was also improved by adding Evotherm [4,83]. Aside from improving the compatibility, Evotherm also improved the workability of the bitumen mixture with smaller air void contents [23], [79]. Moreover, switching CMA from hot-mix asphalt to WMA lowered the mixture's fuel consumption and carbon emissions considerably, reducing its global warming potential by 5 kgCO 2 e [64].…”

Section: Evothermmentioning

confidence: 99%

“…Evotherm contains anti-stripping agents that improved the interface of the mixture. The effect of the warm-mix agent resulted in lesser rutting depth as the bitumen mixture became easier to compact even at temperatures that are considerably lower than the field compaction temperature [79]. Evotherm helps improve the fatigue lives of the composite [42].…”

Section: Evothermmentioning

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: Xylene and Toluenementioning

confidence: 75%

Section: Xylene and Toluenementioning

confidence: 87%

Section: Evothermmentioning

confidence: 99%

Section: Evothermmentioning

confidence: 99%

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Potential Additives in Natural Rubber-Modified Bitumen: A Review

et al. 2023

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“…Methane-4 4’ disocyanate (MDI)-polypropylene glycol or thermoplastic polyurethane could improve the UV aging resistance of asphalt pavement materials. Adding diethylene glycol to toluene diisocyanate (TDI)-castor oil could considerably enhance asphalt’s self-healing characteristics [ 25 , 26 , 27 ]. Additionally, foamed asphalt could be created by using the theory of the isocyanate group in polyurethane reactions with water to generate a urea bond and the volatile gas CO 2 [ 28 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

Modifying Effect and Mechanism of Polymer Powder on the Properties of Asphalt Binder for Engineering Application

Zhao,

Sun,

et al. 2023

Polymers

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For achieving the better modifying effect of polyurethane on asphalt pavement materials, the PUA powder modifier was prepared with fine grinding at the glass transition temperature, and polyurethane-modified asphalt (PUA-MA) with different dosages of modifier was prepared. The impact of the PUA on the physical properties of asphalt binder was studied. The modifying mechanism of PUA on asphalt was explored by investigating the thermal performance and chemical composition of asphalt (thermogravimetric analysis, differential scanning calorimetry test, and Fourier transform infrared spectroscopy). The micrograph of the interactive interface was characterized by scanning an electron microscope. Furthermore, the rheological properties of PUA-MA were also investigated and analyzed. The results indicated that the PUA had a dense structure with few pores on the surface. After mixing with asphalt, it altered the asphalt’s internal structure via physical fusion and chemical reaction (carbamate formation). PUA improved the thermal stability of asphalt, enhanced the asphalt’s thermal decomposition temperature, and further reduced the thermal mass loss while decreasing the glass transition temperature. The addition and dosage increase in the PUA modifier significantly improved the softening point, viscosity, complex shear modulus, and rutting factor of asphalt. Also, the PUA could improve the elastic recovery ability of asphalt and enhance the rutting resistance of asphalt at high temperatures. However, the crack resistance at low temperatures was not effectively improved (ductility and penetration decreased). When the dosage was 6–9%, PUA-MA had the best high-temperature performance, but asphalt showed poor low-temperature performance at this dosage. This study provides a theoretical reference for popularizing and applying polyurethane as an asphalt modifier in road engineering.

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Effect of Rest Period on the Fatigue Characteristics of Unmodified and Modified Bitumen

Jayaraman,

Padmarekha

2024

Int. J. Pavement Res. Technol.

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Evaluation of the self-healing performance of polyurethane-modified bitumen using bitumen bond strength (BBS) test and CT scan

Cited by 14 publications

References 23 publications

Potential Additives in Natural Rubber-Modified Bitumen: A Review

Potential Additives in Natural Rubber-Modified Bitumen: A Review

Modifying Effect and Mechanism of Polymer Powder on the Properties of Asphalt Binder for Engineering Application

Effect of Rest Period on the Fatigue Characteristics of Unmodified and Modified Bitumen

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