Bio-based emulsifiers for pavement material: emulsion formulation and cold asphalt mix properties - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2022

Bio-based emulsifiers for pavement material: emulsion formulation and cold asphalt mix properties

Résumé

The use of two bio-based polymers, B1 and B2, as emulsifier for the preparation of bitumen emulsions, has been investigated. These emulsifiers allowed to prepare bitumen- in-water emulsions with a bitumen content of 50%. Emulsions were prepared with two different processes and were characterized using optical microscopy, laser granulometry, rheological measurements and calorimetry. Emulsions stability was monitored by following the droplets size distribution droplets over time. A comparison was made with a bitumen emulsion stabilized by a cationic surfactant usually used in the road pavement industry. Emulsions prepared with the two bio-based emulsifiers (Em-B1 and Em-B2) presented different properties. Em-B1 had larger droplets and was less stable: after 20 days, the coalescence increased and breaking occurred. Em-B2 had a droplets size distribution closer to the reference and was still stable after a month. Emulsified asphalt mixes were successfully prepared by mixing the emulsions with aggregates. Test specimens were molded in order to evaluate the water sensitivity throughout compressive strength measurement. Static compacted specimens kept in air presented a compression strength similar to the ones obtained for mixes prepared with an amine-type emulsion. For specimens immersed in water, the compression strength decreased significantly, indicating a high water sensitivity likely due to the ability of the polymers to swell with water and the poor interactions between the binder and the aggregates.

Dates et versions

hal-04432731 , version 1 (01-02-2024)

Licence

Paternité - Pas d'utilisation commerciale - Pas de modification

Identifiants

Citer

Fanny Lévenard, Vincent Gaudefroy, Cédric Petiteau, Emmanuel Chailleux, Isabelle Capron, et al.. Bio-based emulsifiers for pavement material: emulsion formulation and cold asphalt mix properties. 11th International Conference on the Bearing Capacity of Roads, Railways and Airfields, Jun 2022, Trondheim, Norway. pp.332-340, ⟨10.1201/9781003222910-34⟩. ⟨hal-04432731⟩
22 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More