Assessment of asphalt binder and mixes modified with Zycotherm and Sulphur

Singh, Maninder; Jain, Karishma; Singh, Sandeep; Kahlon, Sukhjinder Singh

doi:10.1016/j.matpr.2021.09.322

Cited by 1 publication

(9 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Previous studies have reported that as low as 0.3% sulphur can partially congeal into crystalline sulphur particles, thus improving toughness and tenacity with additional strength [61]. Sulphur particle dispersion results in the formation of additional polysulphuric networks in the bitumen phase, which establish the cross-linking structure and contribute to improved storage stability with no phase separation at high temperatures and acceptable rheological analysis results [71,73].…”

Section: Sulphurmentioning

confidence: 99%

“…Warm-mix asphalt (WMA) technology has grown in popularity in recent years because it can drastically lower the working temperature of the bitumen mixture while ensuring its performance and minimising pollutant gas emissions during the mixing and paving stages, resulting in improved on-site construction conditions [61][62][63]. Other advantages of WMA technology include lesser fuel consumption, a faster construction period and transportation time opening and less bitumen thermal ageing [30].…”

Section: Evothermmentioning

confidence: 99%

“…When sulphur is used as a bitumen extender, it decreases the amount of bitumen needed and greenhouse gas emissions while also changing the rheological properties of bitumen. As a result, it minimises the use of bitumen, a naturally occurring substance on the verge of depletion, and makes the mix more cost-effective because sulphur costs three to four times less than bitumen [61]. The influence of sulphur on bitumen varies depending on the bitumen's origin, the types of sulphur used, the sulphur concentration and the blending temperature [52,71].…”

Section: Sulphurmentioning

confidence: 99%

“…Sulphur vulcanisation reveals that NR and bitumen are compatible, which helps minimise the probability of NR droplets coalescing during mixing and supports effective dispersion of the polymer-rich phase in modified bitumen. As time passes, sulphur continues to react with bitumen components, forming an internal network of organic molecules, while excess sulphur crystalises into micrometre-sized structures, resulting in improved stiffness parameters, particularly in the low-frequency range, and softening the bitumen mixture [61].…”

Section: Sulphurmentioning

confidence: 99%

“…Sulphur rearrangement in the bitumen matrix results in increased resistance to oxidative ageing, surface roughness, fatigue resistance and viscosity of sulphur-modified bitumen [71]. Moreover, adding sulphur to the base bitumen increased its high-temperature performance [61]. Singh et al [61] stated that modified bitumen has a considerable decrease in ductility and a greater Marshall stability than conventional bitumen.…”

Section: Sulphurmentioning

confidence: 99%

See 4 more Smart Citations

Potential Additives in Natural Rubber-Modified Bitumen: A Review

et al. 2023

View full text Add to dashboard Cite

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.

show abstract

Section: Sulphurmentioning

confidence: 99%