Alternative biobased emulsifiers for road materials - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2022

Alternative biobased emulsifiers for road materials

Résumé

In this study, three biobased compounds have been investigated as emulsifiers and stabilizers for bitumen emulsions preparation. The emulsifiers used are: a biopolymer (E1), native nanoparticles (E2), and E2 nanoparticles modified in order to be more hydrophobic (HE2). First emulsification assays using an Ultra-turrax® dispersion tool showed that the use of E1 and HE2 led to low-viscosity emulsions while E2 led to a highly viscous emulsion (Em-E2). Bitumen-in-water emulsions with a bitumen content of 60% were further obtained with E1 (Em-E1) and HE2 (Em-HE2), using the colloid mill. These emulsions were characterized and compared to a bitumen emulsion stabilized by a cationic surfactant usually used in the road pavement industry. Laser diffraction analysis, rheological measurements and calorimetry were used for characterization and the stability was assessed by following the droplets mean diameter over time. The emulsions presented different droplets size distributions. All emulsions were stable over at least 50 days. Cold mix asphalt specimens were successfully molded and used to evaluate the water recovery. After 7 days of immersion, specimens made with Em-E1 showed twice the water recovery as specimens made with the reference Em-CS, probably due to the ability of the polymers to swell with water. However, specimens made with Em-HE2 showed the same behavior as those made with Em-CS.
Fichier non déposé

Dates et versions

hal-04424644 , version 1 (29-01-2024)

Identifiants

  • HAL Id : hal-04424644 , version 1

Citer

Fanny Lévenard, Vincent Gaudefroy, Isabelle Capron, Cédric Petiteau, Emmanuel Chailleux, et al.. Alternative biobased emulsifiers for road materials. ISAP Symposium, Oct 2022, San José, Costa Rica. ⟨hal-04424644⟩
16 Consultations
0 Téléchargements

Partager

Gmail Facebook X LinkedIn More