Effect of glass fibers and waste engine oil on the properties of RAP asphalt concretes

Eltwati, Ahmed; Enieb, Mahmoud; Al-Saffar, Zaid Hazim; Mohamed, Ahmad Kilani

doi:10.1080/10298436.2021.2001815

Cited by 20 publications

(8 citation statements)

References 56 publications

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“…The content of the 12%WEO-CR rejuvenator had the highest rut depth compared to other samples. This finding is in line with the findings of Eltwati et al [37], who determined that rutting resistance of WEO-rejuvenated mixtures was better than the conventional mixture. The reduction in rut resistance for asphalt mixes containing 100% RAP and rejuvenator was caused by the WEO, which softened the RAP mixture.…”

Section: Rutting Resistance Of Hma Samplessupporting

confidence: 92%

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Effects of waste engine oil and crumb rubber rejuvenator on the performance of 100% RAP binder

Eltwati¹,

Enieb

AHMEED³

et al. 2022

Journal of Innovative Transportation

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Section: Rutting Resistance Of Hma Samplessupporting

confidence: 92%

“…The greater the ITS value, the stiffer and more viscous the RAP asphalt binders are. This finding is comparable to that of Eltwati et al [37], who determined that RAP had a considerable influence on ITS, with larger RAP concentrations producing higher ITS values.…”

Section: Its Of Hma Samplessupporting

confidence: 90%

Effects of waste engine oil and crumb rubber rejuvenator on the performance of 100% RAP binder

Eltwati¹,

Enieb

AHMEED³

et al. 2022

Journal of Innovative Transportation

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“…This indicates that adding WEO boosted the aromatic percentage of aged asphalt [40]. Previous studies recommended that 9 to 12% WEO content could recover the physical properties of asphalt binders containing a high content of RAP [19,41]. Wang, et al [15] indicated that the mixing of WEO has both positive and negative impacts.…”

Section: Penetration and Softening Pointmentioning

confidence: 92%

“…Jahanbakhsh, et al [18] found that the moisture susceptibility of RAP mixtures increased after adding WEO into blended binders containing 60% RAP. Further, Eltwati, et al [19] developed asphalt mixtures containing 60%, 70% and 80% RAP binders with different dosages of WEO (6%, 9%, 12%) and glass fibers. The results revealed that the application of WEO decreased the resistance of the rejuvenated mixtures to moisture damage compared to virgin mixtures, and it was also shown that increasing the WEO content in the RAP binder made the mixture more susceptible to stripping.…”

Section: Introductionmentioning

confidence: 99%

Effect of Warm Mix Asphalt (WMA) Antistripping Agent on Performance of Waste Engine Oil-Rejuvenated Asphalt Binders and Mixtures

et al. 2023

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Evaluating the performance of rejuvenated asphalt mixes is crucial for pavement design and construction, as using a rejuvenator not only boosts recycling and contributes to positive effects on the environment but also increases the sensitivity to rutting and moisture. This study was executed to evaluate the effect of a warm mix asphalt (WMA) antistripping agent, namely nano-ZycoTherm, on the moisture-induced damage and rutting potential of asphalt mixtures containing 30% and 60% aged (RAP) binder and rejuvenated with 12% waste engine oil (WEO). For this purpose, the rutting resistance of asphalt mixes in wet and dry conditions was examined utilizing a loaded wheel tracker. In addition, the impacts of moisture on the performance of the mixtures were evaluated using different experiments, such as modified Lottman (AASHTO T283), resilient modulus, dynamic creep, aggregate coating and wheel tracking tests. Fourier transform infrared (FTIR) spectroscopy and thermogravimetric (TG) analysis were performed to identify the functional groups, which would be significant in terms of moisture damage, and to assess the thermal stability of binder samples, respectively. The results revealed that the rejuvenation of aged binder with WEO increases the moisture susceptibility of the mixtures; however, the addition of ZycoTherm was found to enhance the moisture resistance of WEO-rejuvenated mixtures. Furthermore, the results indicated that the WEO-rejuvenated mixtures modified with ZycoTherm exhibited a better rutting resistance in a wet condition compared to that of WEO-rejuvenated and conventional HMA mixtures. However, the rejuvenated mixtures modified with ZycoTherm showed poorer rutting performance in a dry condition. In summary, the adoption of the WMA antistripping agent, RAP binder and WEO rejuvenation techniques demonstrated satisfactory outcomes in terms of rutting resistance and moisture susceptibility, and also, these techniques are much less expensive to implement.

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“…Eltwati added glass fiber to an RAP asphalt mixture. Through the Hamburg wheel track test, it was found that glass fiber enhances the rutting resistance of an RAP asphalt mixture; the optimum content of glass fiber was 0.2% [ 17 ]. Xia studied the durability of a bamboo fiber asphalt mixture from three aspects: aging durability, freeze–thaw cycle durability, and fatigue durability.…”

Section: Introductionmentioning

confidence: 99%

Modification and Enhancing Contribution of Fiber to Asphalt Binders and Their Corresponding Mixtures: A Study of Viscoelastic Properties

Li,

Liu,

Xiao

et al. 2023

Materials

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The performance of asphalt binders and asphalt mixtures can be enhanced by the inclusion of fiber. The viscoelastic characteristics of fiber-reinforced asphalt binders and their corresponding mixtures were characterized in this study. To generate fiber-reinforced asphalt samples for dynamic shear rheometer (DSR) tests, polypropylene fibers (PPFs), polyester fibers (PFs), and lignin fibers (LFs) were added into modified asphalt with a ratio of 5wt%. Indirect tensile resilience tests were conducted on the fiber-reinforced asphalt mixture with Marshall samples, which was prepared with a 6.4% of bitumen/aggregate ratio. The addition of fiber can increase the anti-rutting performance of asphalt binders, and also reduce the anti-fatigue performance of asphalt binders to varying degrees. Viscoelastic properties of the fiber-reinforced asphalt binders are highly dependent on the shape of the used fiber. The resistance of the fiber-reinforced asphalt binders to rutting at high temperatures increases with the roughness degree of the fiber’s surface morphology. PPF-reinforced asphalt binders surpass the others in terms of anti-rutting capabilities. The high-temperature deformation resistance of the PPF-reinforced asphalt mixture is stronger, whereas the low-temperature crack resistance of the PF-reinforced asphalt mixture is stronger, which can be observed from the master curve of indirect tensile resilient modulus.

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Effect of glass fibers and waste engine oil on the properties of RAP asphalt concretes

Cited by 20 publications

References 56 publications

Effects of waste engine oil and crumb rubber rejuvenator on the performance of 100% RAP binder

Effects of waste engine oil and crumb rubber rejuvenator on the performance of 100% RAP binder

Effect of Warm Mix Asphalt (WMA) Antistripping Agent on Performance of Waste Engine Oil-Rejuvenated Asphalt Binders and Mixtures

Modification and Enhancing Contribution of Fiber to Asphalt Binders and Their Corresponding Mixtures: A Study of Viscoelastic Properties

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