Abstract
Half Warm Asphalt Mixtures (HWAM) with bitumen emulsion are a relative new, cost effective and environmental friendly emerging technology. HWAM are produced using a combination of aggregates heated up to approximately 120 °C and a percentage of a bitumen emulsion heated to a temperature around 60 °C in order that the mixing and compaction temperature results between 80 to 90 °C. Hence, this procedure involves great savings of energy and low harmful emissions. Although there are recommendations for the formulation of this type of mixtures and references to their conventional mechanical properties, there is a lack of information regarding their rheological properties. This paper presents preliminary results concerning the design and performance of a Half Warm Asphalt Mixture using bitumen emulsion with the aim to evaluate the linear viscoelastic behaviour of this kind of materials. A HWMA was formulated using a cationic super stabilized bitumen emulsion and the Dynamic Modulus (E*) and the Phase Angle (\(\upphi\)) at different temperatures and loading frequencies were measured to produce experimental data for pavement design procedures based on mechanistic principles. It is considered that those findings could encourage greater confidence in promoting the use of these types of sustainable asphalt mixes.
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Angelone, S., Casaux, M.C., Zorzutti, L., Martinez, F. (2020). Linear Viscoelastic Properties of a Half Warm Asphalt Mixture (HWMA) with Bitumen Emulsion. In: Raab, C. (eds) Proceedings of the 9th International Conference on Maintenance and Rehabilitation of Pavements—Mairepav9. Lecture Notes in Civil Engineering, vol 76. Springer, Cham. https://doi.org/10.1007/978-3-030-48679-2_48
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DOI: https://doi.org/10.1007/978-3-030-48679-2_48
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