Full-scale and laboratory investigations on the performance of asphalt mixture containing recycled aggregate with low viscosity binder

Lee, Sang-Yum; Le, Tri Ho Minh; Kim, Yeongmin

doi:10.1016/j.conbuildmat.2022.130283

Cited by 11 publications

(13 citation statements)

References 37 publications

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“…The selection and characterization of aggregates are critical aspects of asphalt mixture design. In accordance with industry standards and guidelines, the aggregates used in this study were carefully chosen to meet the requirements set by the Korean standard (13 mm NMAS) asphalt mixtures, specifically designed for surface layers [ 32 ]. A granitic aggregate was selected based on its suitability for the intended application.…”

Section: Methodsmentioning

confidence: 99%

Sustainable Asphalt Mixtures with Enhanced Water Resistance for Flood-Prone Regions Using Recycled LDPE and Carnauba–Soybean Oil Additive

Kim,

2024

Polymers

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This manuscript presents a comprehensive study on the sustainable optimization of asphalt mixtures tailored for regions prone to flooding. The research addresses the challenges associated with water damage to asphalt pavements by incorporating innovative additives. The study centers on incorporating recycled Low-Density Polyethylene (LDPE) and a tailored Carnauba–Soybean Oil Additive, advancing asphalt mixtures with a Control mix, LDPE (5%) + Control, and LDPE (5%) + 3% Oil + Control. A critical aspect of the research involves subjecting these mixtures to 30 wetting and drying cycles, simulating the conditions prevalent in tropical flood-prone areas. The incorporation of innovative additives in asphalt mixtures has demonstrated significant improvements across various performance parameters. Tensile Strength Ratio (TSR) tests revealed enhanced tensile strength, with the LDPE (5%) + 3% Oil-modified mixture exhibiting an impressive TSR of 85.7%. Dynamic Modulus tests highlighted improved rutting resistance, showcasing a remarkable increase to 214 MPa in the LDPE (5%) with a 3% Oil-modified mixture. The Semi-Circular Bending (SCB) test demonstrated increased fracture resistance and energy absorption, particularly in the LDPE (5%) with 3% Oil-modified mixture. Hamburg Wheel-Tracking (HWT) tests indicated enhanced moisture resistance and superior rutting resistance at 20,000 cycles for the same mixture. Cantabro tests underscored improved aggregate shatter resistance, with the LDPE (5%) + 3% Oil-modified mixture exhibiting the lowest weight loss rate at 9.820%. Field tests provided real-world insights, with the LDPE (5%) + 3% Oil mixture displaying superior stability, a 61% reduction in deflection, and a 256% improvement in surface modulus over the control mixture. This research lays the groundwork for advancing the development of sustainable, high-performance road pavement materials, marking a significant stride towards resilient infrastructure in flood-prone areas.

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Section: Methodsmentioning

confidence: 99%

Sustainable Asphalt Mixtures with Enhanced Water Resistance for Flood-Prone Regions Using Recycled LDPE and Carnauba–Soybean Oil Additive

Kim,

2024

Polymers

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“…In this research, the extracted RAP binder content was examined at two levels, specifically 25% and 50%. The primary objective is to encourage the utilization of reclaimed pavement materials, aligning with sustainability goals [32]. Once the optimal RAP binder content is determined, it will be incorporated into the final binder mixture, which will then be blended with the WPA, further promoting environmentally sustainable practices.…”

Section: Recovery Of Rap Bindermentioning

confidence: 99%

“…RAP is a key element in modern sustainable infrastructure [32]. It involves recycling old asphalt materials to create new mixtures, offering economic and environmental advantages by reducing the need for new resources and minimizing waste disposal [33].…”

Section: Introductionmentioning

confidence: 99%

Assessing the Viability of Waste Plastic Aggregate in Stone-Modified Asphalt Concrete Mix for Bus Rapid Transit Pavement Maintenance

Ohm,

Kim,

Kim

et al. 2023

Buildings

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This research takes on a scientific problem originating from the pervasive deterioration observed in the pavements of Bus Rapid Transit (BRT) systems, which presents formidable challenges to their durability and imposes significant financial burdens on BRT organizations. While wear and tear on BRT pavements is a widely recognized concern, there exists a pronounced deficiency in sustainable solutions to address this issue comprehensively. This study endeavored to bridge this scientific gap by exploring the option of incorporating waste plastic aggregate (WPA) and recycled asphalt pavement (RAP) into the pavement material. The series of comprehensive investigations commenced with an assessment of modified binders. We identified a 25% extracted RAP binder as the most suitable candidate. Our research next determined that a 4% WPA content offers optimal results when used as an aggregate replacement in a stone-modified asphalt concrete mix, which is further refined with a 13 mm nominal maximum aggregate size (NMAS) gradation, resulting in superior performance. Under double-load conditions of the Hamburg Wheel Tracking test, rutting in the 10 mm NMAS mixture rapidly increased to 9 mm after 12,400 HWT cycles, while the 13 mm NMAS mixture showed a more gradual ascent to the same critical rutting level after 20,000 HWT cycles (a 61% increase). Real-world application at a designated BRT station area in Seoul reinforced the findings, revealing that the use of 13 mm NMAS with 4% WPA and RAP significantly improved performance, reducing rutting to 75 µm and enhancing pavement resilience. This configuration increased Road Bearing Capacity (RBC) to 5400 MPa at the center zone, showcasing superior load-bearing capability. Conversely, the 10 mm NMAS mixture without RAP and WPA experienced severe rutting (220 µm) and a 76% reduction in RBC to 1300 MPa, indicating diminished pavement durability. In general, this research highlights the need for innovative solutions to address BRT pavement maintenance challenges and offers a novel, environmentally friendly, and high-performance alternative to traditional methods.

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“…In China, over 90% of the paved roads are asphalt pavement; asphalt pavement is favored for its high smoothness, noise-dampening properties, skid resistance, rapid construction, and ease of maintenance. Despite these advantages, the present design and construction methodologies limit the service life of these pavements to a span of 10–25 years . With the shift in emphasis from large-scale construction to maintenance and repair in road infrastructure, there has been a corresponding surge in annual maintenance costs, now escalating to tens of billions of U.S. dollars.…”

Section: Introductionmentioning

confidence: 99%

Investigating Asphalt Rejuvenators from Biowastes Based on Their Wetting, Diffusion, and Compatibility

Zhou,

Liu,

Fini

et al. 2024

ACS Sustainable Chem. Eng.

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Achieving NetZero carbon emissions necessitates innovative solutions for revitalization and recycling of asphalt pavements. This study focuses on the efficacy of biobased rejuvenators in enhancing the properties of aged asphalt binder, emphasizing their diffusion, wetting, and compatibility. We discovered that low-viscosity rejuvenators, specifically palm oil and waste cooking oil, significantly improve wetting, with rates of 79.2 and 317.2 mm/s, respectively. The diffusion rate was found to correlate with chemical composition and viscosity, with palm oil leading, followed by soybean and castor oils. Compatibility assessment, based on the thermodynamic free energy of mixing, Han curve analysis, and Cole−Cole plots, revealed that palm oil effectively restored the molecular and colloidal structures of aged asphalt. These findings underscore the significance of rejuvenator compatibility for optimal performance and sustainability, contributing to the advancement of NetZero carbon road infrastructure.

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Full-scale and laboratory investigations on the performance of asphalt mixture containing recycled aggregate with low viscosity binder

Cited by 11 publications

References 37 publications

Sustainable Asphalt Mixtures with Enhanced Water Resistance for Flood-Prone Regions Using Recycled LDPE and Carnauba–Soybean Oil Additive

Sustainable Asphalt Mixtures with Enhanced Water Resistance for Flood-Prone Regions Using Recycled LDPE and Carnauba–Soybean Oil Additive

Assessing the Viability of Waste Plastic Aggregate in Stone-Modified Asphalt Concrete Mix for Bus Rapid Transit Pavement Maintenance

Investigating Asphalt Rejuvenators from Biowastes Based on Their Wetting, Diffusion, and Compatibility

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