Minimum Virgin Binder Content Needed in Recycled Superpave Mixtures to Resist Fatigue Cracking and Moisture Damage

Tavakol, Masoumeh; Hossain, Mustaque; Heptig, Blair

doi:10.1061/(asce)mt.1943-5533.0002314

Cited by 5 publications

(3 citation statements)

References 4 publications

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“…They do not release any harmful gases when heated, but when sprayed over hot aggregate at 160 C, the melted plastic tends to create a lamination or coating. [14][15].…”

Section: Mathematical Statistician and Engineering Applicationsmentioning

confidence: 99%

The Economic Value of Plastic Waste Used as Paving Aggregate

Negi¹

2022

MSEA

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Solid waste, of which plastic waste is a significant part, is plentiful and often gets thrown away without being properly processed into a usable resource. Municipal plastic garbage disposal has increased dramatically, particularly in metropolitan areas, and this has a negative effect on the aesthetic quality of the environment. As a binding agent, plastic proved to be quite useful pliable asphalt mixtures made from bitumen. By limiting fracture formation and decreasing rainfall penetration, this effective strategy helps pavements tolerate greater temperatures, which would otherwise contribute to the development of potholes. Water seepage is decreased and crushing and abrasion parameters are increased in these pavements. Roads made of plastic would be a great solution to the problem of potholes caused by India's hot and humid environment, where temperatures often exceed 50°C and heavy rains cause havoc, leaving most roads in terrible condition. Road paving, airport runways, parking garage floors, and other related construction applications often employ a composite material called bituminous concrete (BC). The final product is made by layering mineral aggregate with asphalt or bitumen (used as a binder), and then crushing the resulting mixture. The substantial distinction in daily and seasonal temperature, coupled with the ever-increasing volume of traffic comprised primarily of commercial vehicles, has put us in a precarious position that necessitates creative solutions for enhancing the characteristics and quality of the pavement through the implementation of some necessary modifications that must therefore satisfy the both strength and economic aspects. When viewed from an environmental point of view, it is apparent that polythenes are a major contributor to air pollution. As it has been shown that polythenes are not biodegradable, finding a solution for waste polyethene has become an essential issue.

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“…They do not release any harmful gases when heated, but when sprayed over hot aggregate at 160 C, the melted plastic tends to create a lamination or coating. [14][15].…”

Section: Mathematical Statistician and Engineering Applicationsmentioning

confidence: 99%

The Economic Value of Plastic Waste Used as Paving Aggregate

Negi¹

2022

MSEA

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“…Low RAP levels (<50%) do not greatly affect the resistance, porosity, water absorption, reduced rutting, increased tensile strength, or modulus [ 1 , 2 , 3 , 7 , 9 , 11 , 15 ]. Additionally, as the RAP content increases, the cracking deterioration [ 5 , 8 , 12 , 34 , 35 , 36 ] and susceptibility to moisture increase [ 10 ], while the dynamic modulus and tensile strength decrease [ 15 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Rheological Evaluation of Softened Binders Blended with Aged Asphalt Selected with a High-Temperature Mixing Chart

et al. 2022

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Reclaimed asphalt pavements (RAP) provide economic and environmental benefits. In recent decades, their use has increased, but rheological properties are affected by RAP aging, increasing stiffness, cracking, and susceptibility to water. To counteract these effects, rejuvenating agents are used, but they must be properly dosed to design quality mixtures. Therefore, different binders were analyzed, including virgin binder (VBB), binder modified by SBS polymer (MB), AC-RAP, binder softened using a rejuvenating agent, and binders softened with doses (15%, 30%, and 45%) of AC-RAP. The rheological properties were evaluated by dynamic shear rheometry (DSR) and beam-bending rheometry (BBR) tests, while the linear amplitude sweep (LAS) test was used to measure fatigue cracking and the multiple stress creep recovery (MSCR) test was used to measure rutting. A mixing chart was constructed based on a high temperature AC-RAP to satisfy the performance grade (PG 76-22). The results showed that softened binders become flexible, but when AC-RAP is added, they turn stiff and behave better than MB. Moreover, combining a rejuvenating agent and AC-RAP reduces the aging stiffness of RAP, improving its rheological properties without compromising the rutting or cracking resistance.

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“…Rutting in flexible pavement occurs due to many factors such as: binder properties, air void, environmental conditions, compaction level, asphalt mixture stability, etc. [ 25 , 26 , 27 ]. Studies have been carried out for the evaluation of permanent deformations like rutting and moisture damage when repeated loading by a mechanized wheel was subjected to asphalt specimens.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Hamburg Wheel-Tracking Device Stripping Performance Properties of Recycled Hot-Mix Asphalt Mixtures

et al. 2020

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Moisture damage in hot mix asphalt pavements is a periodic but persistent problem nowadays, even though laboratory testing is performed to identify different moisture-susceptible mixtures. In this study, a Hamburg Wheel Tracking device (HWTD) was used for rutting tests which were conducted on control and a high percentage of recycled asphalt pavement (RAP), i.e., 30%, 50% and 100% of virgin mixtures, under air dry and water-immersed conditions. Similarly, the extracted bitumen from RAP was tested for binder physical properties. Results showed that the asphalt mixtures containing RAP have less rut depth as compared to the control mix both in air dry and immersion conditions and hence showed better anti-rutting properties and moisture stability. Stripping performance of control and RAP containing mixtures was also checked, concluding that the RAP mixture was greatly dependent on the interaction between the binder (virgin plus aged) and aggregates.

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Minimum Virgin Binder Content Needed in Recycled Superpave Mixtures to Resist Fatigue Cracking and Moisture Damage

Cited by 5 publications

References 4 publications

The Economic Value of Plastic Waste Used as Paving Aggregate

The Economic Value of Plastic Waste Used as Paving Aggregate

Rheological Evaluation of Softened Binders Blended with Aged Asphalt Selected with a High-Temperature Mixing Chart

Investigation on Hamburg Wheel-Tracking Device Stripping Performance Properties of Recycled Hot-Mix Asphalt Mixtures

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