Abstract
Adhesion between binder and aggregate is a major concern when studying bituminous mixtures’ mechanical performances. Many parameters are to be taken into account, for instance chemical composition of binder and aggregate, interface roughness, etc. Isolating each parameter for a comprehensive approach of adhesion phenomenon can be very challenging but necessary. This paper is a first step of a larger study to isolate the role of surface chemical properties of aggregates in binder/aggregate interface. In order to alter only the very surface of aggregate and its chemical composition, a simple 3-step-procedure for chemical surface modification at molecular scale using two different hydrophobic organosilanes is given. Two substrates proposed here are made of classical rock (microdiorite) for pavement construction from a French quarry, and of glass as model material. The change of physicochemical properties of modified substrates is then assessed through contact angle method on smooth plates, while the nano-coating’s composition is assessed with X-Ray Photoelectron Spectroscopy (XPS) on aggregates. Contact angle method significantly revealed hydrophobic properties for both modified substrates, up to a 30 degrees’ increase. XPS analysis show that the coating is a success on both substrates, and probably with a strong siloxane bond.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Adams, R.D.: Adhesive Bonding. W.P. Limited, Ed. (2005)
Arkles, B.: Tailoring surfaces with silanes. In Chemtech (Ed.) (1977)
Arkles, B.: Hydrophobicity, hydrophilicity and silane surface modification (Gelest, Inc.) (2011)
Baldi-Sevilla, A., et al.: Influence of bitumen and aggregate polarity on interfacial adhesion. Road Mater. Pavement Des. 18, 304–317 (2017)
Boulangé, L., Bonin, E., Saubot, M.: Physicochemical characterisations of the bitumen–aggregate interface to get a better understanding of stripping phenomena. Road Mater. Pavement Des. 14, 384–403 (2013)
Canestari, F., Cardone, F., Graziani, A., Santagata, F.A., Bahia, H.U.: Adhesive and cohesive properties of asphalt-aggregate systems subjected to moisture damage. Road Mater. Pavement Des. 1(Special Issue 1), 11–32 (2010)
Corté, J.-F., Di Benedetto, H.: Matériaux Routiers Bitumineux (Lavoisier – Hermès) (2004)
Hefer, A., Little, D.: Adhesion in bitumen-aggregate systems and quantification of the effects of water on the adhesive bond. Technical report, International Center for Aggregate Research (2005)
Min, Y., et al.: Surface modification of basalt with silane coupling agent on asphalt mixture moisture damage. Appl. Surf. Sci. 346, 497–502 (2015)
Packham, D.E.: Handbook of adhesion. Wiley (ed.) (1992)
Plueddemann, E.P.: Silane Coupling Agents. Springer, New York (1991)
Vassaux, S., et al.: Towards a better understanding of wetting regimes at the interface asphalt/aggregate during warm-mix process of asphalt mixtures. Constr. Build. Mater. 133, 182–195 (2017)
Acknowledgments
The authors thank Eiffage Route company and the Eiffage/ENTPE industrial chair for providing support and resources that helped to carry out this research.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2019 RILEM
About this paper
Cite this paper
Orozco, G., Sauzéat, C., Galipaud, J., Di Benedetto, H. (2019). Modifying Surface Properties of Model and Pavement Aggregates with Silanes. In: Poulikakos, L., Cannone Falchetto, A., Wistuba, M., Hofko, B., Porot, L., Di Benedetto, H. (eds) RILEM 252-CMB Symposium. RILEM 252-CMB 2018. RILEM Bookseries, vol 20. Springer, Cham. https://doi.org/10.1007/978-3-030-00476-7_15
Download citation
DOI: https://doi.org/10.1007/978-3-030-00476-7_15
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-030-00475-0
Online ISBN: 978-3-030-00476-7
eBook Packages: EngineeringEngineering (R0)