Effect of High Content of Waste Tire Rubber and Sulfur on the Aging Behavior of Bitumen

Wang, Sheng; Huang, Weidong; Liu, Xueyan; Lin, Peng; Ren, Shisong; Li, Yang

doi:10.3390/app12115417

Cited by 1 publication

(4 citation statements)

References 30 publications

(37 reference statements)

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“…Previous studies that incorporated PPA with other rubber polymers (NR, CR, NRL, DRMA, SBR, etc.) showed that the material exhibits improved toughness and tenacity, enhanced viscoelasticity, rutting resistance, resistance to permanent deformation, fatigue resistance with reduction in creep stiffness, and ductility [16,31,55,59,71,81]. PPA also helped increase the high-and low-temperature performance of modified bitumen [31,35,38,81], endowed it with good anti-ageing behaviour [72,73,81] and improved the adhesion force of base bitumen [15].…”

Section: Polyphosphoric Acidmentioning

confidence: 99%

“…[42,59] High-temperature performance Improvement in high-temperature performance. [42,71,81] Storage stability Enhancement in storage stability (difference in softening value ≤ 2.5 • C). [42,55,60,71] Stiffness Better or improved stiffness parameter resulted in improved elastic behaviour of asphalt.…”

Section: Properties Explanation Referencementioning

confidence: 99%

“…[42,60,72] Ageing More resistant to oxidative, short-and long-term ageing. [72,80,81] Homogeneity Homogeneous mixture with great compatibility of modifier with bitumen; more uniform cross-linked network structure. [42,44,55,71,72,77,81,95,96] Elasticity Enhanced elastic behaviour due to sulphur cross-linking effect; decreased Jnr (26-30%) and δ and increased R and G*.…”

Section: Properties Explanation Referencementioning

confidence: 99%

“…[72,80,81] Homogeneity Homogeneous mixture with great compatibility of modifier with bitumen; more uniform cross-linked network structure. [42,44,55,71,72,77,81,95,96] Elasticity Enhanced elastic behaviour due to sulphur cross-linking effect; decreased Jnr (26-30%) and δ and increased R and G*. [55,59,80,95] Thermal stability and conductivity Enhanced thermal stability and conductivity.…”

Section: Properties Explanation Referencementioning

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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