Viscoelasticity of Recycled Asphalt Mixtures with High Content Reclaimed SBS Modified Asphalt Pavement

Zheng, Kunpeng; Xu, Jun; Wang, Jie

doi:10.3390/su15032515

Cited by 8 publications

(2 citation statements)

References 38 publications

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“…In general, these research findings align with Zheng et al in corroborating the impact of varying content [48], specifically RAP-SBS, on asphalt performance. The observed influence of RAP content and loading frequency on viscoelastic properties in Zheng's finding resonates with our study's focus on the nuanced effects of RAP content and SBSmodified binders on mechanical properties.…”

Section: Field Test Resultssupporting

confidence: 87%

Optimizing Rural Pavements with SBS-Modified Asphalt Binders and Petroleum Resin

Kim,

2024

Buildings

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This study addresses the imperative for enhancing asphalt mixtures tailored for rural pavements, focusing on optimizing RAP mixtures with styrene–butadiene–styrene (SBS)-modified asphalt binders incorporating petroleum resin and oil. Through systematic investigation, the study examines the impact of varying RAP content (25% and 50%) and two SBS-modified asphalt binder types (Type 1 and Type 2) on mechanical properties and sustainability. Laboratory tests reveal that the mix of 25% RAP + 75% Type 1 exhibits exceptional flexibility, evidenced by a high ductility value of 880 mm at 25 °C, enhancing pavement resilience. Conversely, the 50% RAP + 50% Type 2 mixture displays vulnerability to fatigue cracking, while 25% RAP + 75% Type 1 demonstrates superior resistance, with a fatigue vulnerability value of 1524 kPa. The Hamburg Wheel Tracking test highlights the influence of RAP content on rut depth, with the mix of 50% RAP + 50% Type 1 achieving the lowest rutting at 3.9 mm. Overlay test results show the mix of 25% RAP + 75% Type 2’s resilience, with the lowest load reduction at 64.5%, while the mix of 50% RAP + 50% Type 1 exhibits substantial load reduction at 82.1%. Field tests unveil differences in pavement bearing capacities, with the mix of 25% RAP + 75% Type 2 demonstrating a remarkable elastic modulus of 58.5 MPa, indicating heightened bearing capacity. The investigation underscores the significant role of SBS-modified asphalt binders with incorporated petroleum resin and oil in enhancing fatigue resistance for sustainable rural pavements.

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Section: Field Test Resultssupporting

confidence: 87%

Optimizing Rural Pavements with SBS-Modified Asphalt Binders and Petroleum Resin

Kim,

2024

Buildings

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“…Although the use of RAP has been highlighted in recent decades, the transport departments of several countries limit the RAP incorporation for the production of asphalt mixtures to 15 to 30% in China [11] and 15 to 45% in the US [12]. This limitation is due to the properties of reclaimed asphalt binder, which is characterized by high stiffness, elasticity, and brittleness.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Performance of Recycled Asphalt Mixtures: Viscoelastic Continuum Damage Approach and Cost Analysis

et al. 2023

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This study aims to evaluate the fatigue phenomenon in recycled hot asphalt mixture for an asphalt surface layer. Eight mixtures were evaluated in the laboratory, and the samples were divided into two major groups: four mixtures containing neat binder and RAP from source 1 (RAP with neat binder) and four mixtures containing SBS-modified binder and RAP from source 2 (RAP with SBS-modified binder). The levels of RAP incorporation were 0%, 10%, 20%, and 30% in relation to the total weight of the mixtures. The mixtures followed the Marshall mix design methodology. The results indicate that mixtures with polymer-modified binder presented better performance, whereas the addition of RAP slightly decreased the resistance to fatigue cracking. In terms of economic analysis, the use of RAP, for all cases, leads to a reduction in production costs due to the reduction of the binder and aggregate added, with savings of up to 14.1% in the case of 30% of RAP for the SBS binder. When evaluating the economic impact of inserting RAP and its relationship with fatigue performance in the long term, it can be observed that the type of binder added impacts the results: mixtures with SBS binder present economic gains within acceptable quality parameters up to 30% RAP insertion; for mixtures with neat binder, the percentage of up to 10% RAP is advantageous.

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Recyclability of reclaimed asphalt rubber pavement

Bocci,

Prosperi

2023

Construction and Building Materials

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Viscoelasticity of Recycled Asphalt Mixtures with High Content Reclaimed SBS Modified Asphalt Pavement

Cited by 8 publications

References 38 publications

Optimizing Rural Pavements with SBS-Modified Asphalt Binders and Petroleum Resin

Optimizing Rural Pavements with SBS-Modified Asphalt Binders and Petroleum Resin

Fatigue Performance of Recycled Asphalt Mixtures: Viscoelastic Continuum Damage Approach and Cost Analysis

Recyclability of reclaimed asphalt rubber pavement

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