Performance Assessment of Rubberized Mixtures Containing Reclaimed Asphalt and a Viscosity Reduction Additive

Urbano, Leonardo; Dalmazzo, Davide; Riviera, Pier Paolo; Santagata, Ezio

doi:10.1007/978-3-030-48679-2_43

Cited by 3 publications

(2 citation statements)

References 14 publications

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“…Recycled materials of different origins, such as construction and demolition waste [7][8][9][10][11][12][13], plastics [14][15][16][17][18][19][20], rubber [21][22][23][24][25][26], reclaimed asphalt [10,19,24,25,[27][28][29][30][31][32][33][34][35][36][37], and mineral sludge [38][39][40][41][42][43][44], have the potential for recycling in road pavement materials, making the performance of the corresponding mixtures in which they are employed comparable to those obtained with totally virgin components.…”

Section: Introductionmentioning

confidence: 99%

Life Cycle Assessment of Environmentally Friendly Solutions for the Construction of Unpaved Rural Roads

Di Sessa,

Riviera,

Tsantilis

et al. 2023

Infrastructures

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In recent decades, the international community has recognized the detrimental impact of the construction industry on the environment. In recent years, the use of recycled aggregates has attracted increasing interest as a sustainable and cost-effective solution for the construction and maintenance of road pavements. The life cycle assessment (LCA) represents a valuable methodology for evaluating the environmental sustainability of technologies involving the use of such materials. This study deals with the LCA of alternative solutions for the construction and maintenance of unpaved rural roads. Different scenarios using recycled materials, such as reclaimed asphalt and mineral sludge, are analyzed and compared to a reference solution that employs only virgin aggregates. The environmental sustainability of the proposed alternatives is assessed by considering the global warming potential (GWP), energy requirements, and water consumption. The LCA analysis is performed using SimaPro software (version 9.1.1.7). The obtained results demonstrate that solutions involving the use of recycled materials represent a more sustainable and environmentally friendly option. In particular, a significant reduction in water depletion was found for the alternative scenarios, with savings between 56% and 99%. For GWP and energy, the total savings ranged from approximately 20% to 40%.

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Section: Introductionmentioning

confidence: 99%

Life Cycle Assessment of Environmentally Friendly Solutions for the Construction of Unpaved Rural Roads

Di Sessa,

Riviera,

Tsantilis

et al. 2023

Infrastructures

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“…Reclaimed asphalt (RA), which comes from the milling of existing asphalt pavements and is formed by aggregate clusters coated by aged bituminous binders, is widely used as an alternative component in the construction of flexible pavements [ 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ], since it is available in large quantities (in 2019 more than 48 million of tons of RA was available in the EU [ 14 ]).…”

Section: Introductionmentioning

confidence: 99%

A Sustainable Cold-Recycled Solution for the Surface Finishing of Unpaved Rural Roads

et al. 2022

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This paper presents the results of an experimental investigation which was carried out with the purpose of assessing the performance-related properties of an emulsion-based cold-recycled mixture to be employed as a sustainable solution for the surface finishing of unpaved rural roads. This mixture contained significant quantities of recycled components (reclaimed asphalt and mineral sludge), and its composition was fine-tuned by following an innovative mix design procedure. Properties of these mixtures were studied by means of laboratory tests which considered key parameters, such as flowability, indirect tensile stiffness modulus, indirect tensile strength, moisture susceptibility and resistance to permanent deformation. It was found that, by means of the proposed mix design procedure, optimal dosages of the recycled components can be identified, thereby ensuring the achievement of the desired properties in terms of high workability and adequate stiffness and strength.

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Use of Municipal Solid Waste Bottom Ashes in Rubberized Asphalt Mixtures

Santagata

Riviera

Baglieri

et al. 2023

Journal of Testing and Evaluation

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The increasing need of environment protection and preservation has been stimulating road agencies to progressively adopt sustainable technologies for the design, construction, and maintenance of their assets, with the consequent increasing use of recycled materials, industrial by-products, and wastes. In such a context, the experimental investigation presented in this paper moved from the idea of synergistically combining the use of bottom ashes originating from incineration of municipal solid waste (MSW) and crumb rubber from end-of-life tires. The performance-related properties of rubberized asphalt mixtures containing MSW bottom ashes in partial substitution of natural aggregates were evaluated by means of laboratory tests focused on the determination of workability, viscoelastic characteristics, anti-rutting potential, and resistance to crack propagation. Tests were carried out by considering an ash-amended rubberized asphalt mixture and, for comparison purposes, a standard gap-graded rubberized mixture (GGRM). Obtained results indicate that the rubberized mixture containing bottom ashes exhibited lower workability (16 % decrease in k parameter), reduced stiffness (decrease of dynamic modulus at 20°C of approximately 40 % and 60 % at 0.1 Hz and 10 Hz, respectively), and decreased anti-rutting potential (17 % decrease in flow number values) with respect to the standard GGRM. Conversely, the addition of bottom ashes was found to provide beneficial effects in terms of resistance to crack propagation (with fracture toughness values five times larger than those of the reference mixture). These outcomes suggest that the use of MSW bottom ashes must be carefully considered because environmental benefits may be counterbalanced by lower performance.

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Performance Assessment of Rubberized Mixtures Containing Reclaimed Asphalt and a Viscosity Reduction Additive

Cited by 3 publications

References 14 publications

Life Cycle Assessment of Environmentally Friendly Solutions for the Construction of Unpaved Rural Roads

Life Cycle Assessment of Environmentally Friendly Solutions for the Construction of Unpaved Rural Roads

A Sustainable Cold-Recycled Solution for the Surface Finishing of Unpaved Rural Roads

Use of Municipal Solid Waste Bottom Ashes in Rubberized Asphalt Mixtures

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