Characterization of Sustainable Asphalt Mixtures Containing High Reclaimed Asphalt and Steel Slag

Georgiou, Panos; Loizos, Andreas

doi:10.3390/ma14174938

Cited by 11 publications

(3 citation statements)

References 32 publications

(46 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One of the critical benefits of sustainable road construction is the preservation of natural resources. Reusing steel instead of virgin materials can conserve valuable resources such as iron ore and reduce the need for energy-intensive mining and extraction processes [29]. This not only helps in conserving natural resources but also reduces the associated environmental impact.…”

Section: Sustainable Road Constructionmentioning

confidence: 99%

Utilisation of Reused Steel and Slag: Analysing the Circular Economy Benefits through Three Case Studies

Cervantes Puma,

Salles,

Turk

et al. 2024

Buildings

View full text Add to dashboard Cite

This research explores sustainable construction practices focusing on material reuse, specifically reclaimed structural steel and slag. In general, the building stock is not designed for deconstruction, and material recovery for reuse at the end of life of buildings is complex and challenging. The study evaluates the benefits of content reuse through a thorough analysis of three case studies—BedZED eco-friendly housing, Angus Technopôle building, and the use of steel slag aggregate in road construction. It highlights the value of reclaimed structural steel and by-products like steel slag in waste reduction, energy conservation, and resource preservation. The BedZED case study showcases recycled steel’s cost-effectiveness and economic viability in construction, while the Angus Technopôle building exemplifies the adaptive reuse of an old steel frame building. Additionally, the third case study showcases the benefits of using Electric Arc Furnace C slag in asphalt-wearing courses, highlighting the reduction in greenhouse gas emissions and environmental impact. The versatility of reclaimed structural steel and slag is evident in integrating material reuse in building construction and road infrastructure. These case studies illustrate the potential for reusing steel and its by-products in various construction contexts, from eco-friendly housing to road development. Therefore, the study aims to demonstrate the feasibility and benefits of sustainable practices within the construction industry by showcasing the successful incorporation of reclaimed steel and slag in these projects. Considering the significant contributions of building construction to global greenhouse gas emissions, raw material extraction, and waste production, the study advocates for adopting circular economy (CE) principles within the construction industry. Finally, the analysis of case studies underscores the advantages of reclaimed structural steel and the valorisation of steel slag through the lens of CE and their contribution to sustainable development.

show abstract

Section: Sustainable Road Constructionmentioning

confidence: 99%

Utilisation of Reused Steel and Slag: Analysing the Circular Economy Benefits through Three Case Studies

Cervantes Puma,

Salles,

Turk

et al. 2024

Buildings

View full text Add to dashboard Cite

show abstract

“…On the other hand, Pasetto and Baldo (2015) [214] obtained a lower thermal cracking resistance while investigating asphalt mixtures for road base courses made with reclaimed asphalt pavement and steel slags, depending on the RA and steel slag contents (up to 70% in weight as limestone substitution), as well as the aging conditions of samples. Suitable bituminous mixtures can be produced using both EAF steel slags and RA (up to 50%), in combination with the warm technology (by synthetic wax additive), without compromising the fracture characteristics of the asphalt concrete [216].…”

Section: Fatigue Resistancementioning

confidence: 99%

The Use of Steel Slags in Asphalt Pavements: A State-of-the-Art Review

et al. 2023

View full text Add to dashboard Cite

Steel slag is a by-product obtained through the separation of molten steel from impurities in steel-making furnaces. It can be produced by different types of furnaces (blast, basic oxygen, electric arc, ladle furnaces). The reuse of metallurgical slags in road pavements can pursue aims of recycling and environmental sustainability. Based on the extensive literature, the paper presents a state-of-the-art review concerning the use of slags in asphalt pavements, discussing the main controversial literature findings. Slag manufacturing processes, chemical, morphological, and physical characteristics, affect its contribution to the asphalt mixture, when it partially or fully substitutes natural aggregates. Legislative state-of-the-art environmental issues, weathering, and leaching aspects are also discussed. The main mechanical and durability properties of pavements containing different types of slags are analyzed based on laboratory and field studies. Generally, the higher mechanical properties of steel slag suggest that its inclusion in asphalt mixtures can provide high-performance pavement layers (excellent strength and stiffness, superior rutting and fatigue resistance, low moisture susceptibility). However, several research gaps still exist (e.g., mix design and seasoning procedure, bitumen–aggregate affinity, low-temperature behavior, brittleness); they are discussed to direct possible future study efforts to clarify specific technical aspects, such as, for example, the effect of slag morphology and physical properties on the final mix properties and the development of specific mix design guidelines.

show abstract

“…Similarly, Abreu et al [2] stated that the incorporation of sustainable methods for construction is progressively turning into a societal necessity. Georgiou and Loizos [3] stated that redefining the "end-of-life" approach with the approach of the reduction, reutilization and reprocessing of materials, in concurrence with the inclusion of waste by-products for industrial processes, must be systematically initiated with the goal of consolidating the circular economic approach amongst pavement stakeholders. In this manner, the recycling of waste by-products will grow with technology and be continuously improved through the investigation of modern solutions for waste valorization and the increase of waste by-product reuse.…”

Section: Introductionmentioning

confidence: 99%

Building Sustainable Pavements: Investigating the Effectiveness of Recycled Tire Rubber as a Modifier in Asphalt Mixtures

Plati

Cliatt

2021

Energies

View full text Add to dashboard Cite

Building more sustainable pavements for the future requires knowledge of alternative and innovative materials for utilization in future road construction and maintenance activities. Being mindful of this need, the present study investigates a Reacted and Activated Rubber (RAR) compound modifier with the aim of defining an optimal RAR percentage in Asphalt Concrete (AC) mixes. It is acknowledged that when this type of modifier is incorporated within an AC mix as an alternative for the bituminous binder material, the associated economic, environmental and social benefits are significant. Simply put, the use of RAR modifiers provides the potential to utilize a waste product (rubber tires) as a more sustainable alternative to bitumen within AC mixtures. However, it seems that the information about the overall performance of AC mixes modified with RAR is currently limited. On these grounds, the present study focuses on the surface course layer and evaluates (a) achieved physical characteristics (compaction degree/voids), (b) mechanical characterization results (stiffness moduli) and (c) friction-based properties of tested mixtures incorporating varying RAR levels and different test temperatures. From the evaluation, it is concluded that for the case of the surface course mixture under investigation, the optimal percentage by weight of bitumen for inclusion of the RAR modifier is 10%.

show abstract

Characterization of Sustainable Asphalt Mixtures Containing High Reclaimed Asphalt and Steel Slag

Cited by 11 publications

References 32 publications

Utilisation of Reused Steel and Slag: Analysing the Circular Economy Benefits through Three Case Studies

Utilisation of Reused Steel and Slag: Analysing the Circular Economy Benefits through Three Case Studies

The Use of Steel Slags in Asphalt Pavements: A State-of-the-Art Review

Building Sustainable Pavements: Investigating the Effectiveness of Recycled Tire Rubber as a Modifier in Asphalt Mixtures

Contact Info

Product

Resources

About