Mechanistic-empirical evaluation of soil-RAP mixtures for use as unbound granular layers of asphalt pavements

de Almeida Silva, Paulo; Sergio de Souza Almeida, Mario; Miller Machado Pereira, Ítalo; Rucas Andrade Achy, Acbal; Gustavo Silva Costa, Weiner; Dias Amancio de Lima, Caroline; Almeida Brito, Jamille

doi:10.1016/j.trgeo.2024.101290

Transportation Geotechnics

2024

DOI: 10.1016/j.trgeo.2024.101290

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Mechanistic-empirical evaluation of soil-RAP mixtures for use as unbound granular layers of asphalt pavements

Paulo de Almeida Silva,

Mario Sergio de Souza Almeida,

Ítalo Miller Machado Pereira

et al.

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Cited by 5 publications

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Soil-aggregate-cement mixtures for base pavement layers: A strength and stiffness characterization

Tavares,

Furlan,

Fabbri

et al. 2025

Transportation Geotechnics

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Soil-aggregate-cement mixtures for base pavement layers: A strength and stiffness characterization

Tavares,

Furlan,

Fabbri

et al. 2025

Transportation Geotechnics

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The influence of residual asphalt material in the mechanical behaviour of soil-RAP mixtures for use in paving

Boaventura,

Almeida,

Costa

et al. 2024

International Journal of Pavement Engineering

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Effect of Sand Addition on Laterite Soil Stabilization

Almeida,

Coelho,

Guimarães

et al. 2024

Materials

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Lateritic soils, particularly abundant in tropical regions, have been successfully used in the construction of unbound layers of flexible pavements in Brazil since the 1970s. Despite their potential, these soils are often discarded or only recommended after stabilization processes, based on traditional parameters such as gradation requirements and Atterberg limits. This study investigates the mechanical characteristics of a lateritic soil from Roraima, focusing on its resilient modulus and permanent deformation properties, assessed through repeated load triaxial tests. Specifically, this research examines the effect of adding 20% sand on the mechanical behavior of the material. The results indicate that sand addition did not significantly improve the mechanical performance. The laterite–sand mixture exhibited an average resilient modulus (RM) of 744 MPa, lower than the 790 MPa of pure lateritic soil, suggesting that pure laterite remains suitable for pavement applications. Furthermore, the permanent deformation analysis revealed that the mixture with sand experienced nearly twice the plastic strain compared to pure laterite, which demonstrated superior accommodation under repeated loading. In the shakedown analysis, pure laterite exhibited a more stable performance, indicating greater durability in pavement applications. These findings highlight the importance of understanding the mechanical behavior of lateritic soils beyond conventional testing methods, emphasizing the potential of pure laterite as a viable alternative to enhance the strength and durability of pavement structures.

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Mechanistic-empirical evaluation of soil-RAP mixtures for use as unbound granular layers of asphalt pavements

Cited by 5 publications

References 18 publications

Soil-aggregate-cement mixtures for base pavement layers: A strength and stiffness characterization

Soil-aggregate-cement mixtures for base pavement layers: A strength and stiffness characterization

The influence of residual asphalt material in the mechanical behaviour of soil-RAP mixtures for use in paving

Effect of Sand Addition on Laterite Soil Stabilization

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