Benefits of Adding Hydrated Lime to Asphalt Mixtures: A Review

Journal: Journal of Building Technology DOI: 10.32629/jbt.v7i1.3771

Karina Kikut Cruz, M.Sc. Alejandra Baldi, M.Sc. Ana Luisa Elizondo Salas

LanammeUCR, University of Costa Rica

Abstract

Hydrated lime is used as an additive for asphalt mixtures, since it enhances the properties of the material in a unique way, enabling a longer service life. In this study, several scientific articles were analyzed in order to understand some of the methods employed of adding hydrated lime to the asphalt mixtures, as well as the optimum amount of hydrated lime that will significantly improve the material's response towards diverse factors. It was found that the researchers usually add hydrated lime in percentages ranging between 1%-2% in weight of aggregates. Also, in the case of asphalt modified with hydrated lime, the material is stiffer and more resistant to moisture damage. Finally, after this literature review, it is concluded that adding 1.5% of hydrated lime resulted in the most promising properties being obtained in most of the studies considered.

Keywords

asphalt; hydrated lime; moisture damage; asphalt matrix

References

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