Influence of Expanded Graphite Surface Ozonation on the Adhesion between Carbon Additive and Cement Matrix

  • Agnieszka Ślosarczyk Poznan University of Technology, Institute of Structural Engineering, Poland
  • Piotr Krawczyk Poznan University of Technology
Keywords: cement composites, expanded graphite, surface treatment, adhesion, mechanical properties

Abstract

Cement mortars modified with expanded graphite (EG) subjected to surface treatments in gaseous ozone were investigated. It was shown that the bonding between carbon additive and cement paste strongly depends on the surface modification of EG and the chemical composition of EG surface plays the important role in shaping the mechanical properties of cement composites. The expanded graphite subjected to ozone treatment showed the substantial increase of flexural toughness of cement composite. The above results were confirmed by XPS and SEM analysis.

DOI: http://dx.doi.org/10.5755/j01.ms.21.2.5860

Published
2015-06-30
Section
CONSTRUCTION MATERIALS