MODIFYING CARBON ROVING-CEMENT MATRIX BOND BY INORGANIC COATING

Author(s): A. Peled, V. Mechtcherine, D. Nicke and S. Hempel
Book Title: Seventh International RILEM Conference on High Performance Fiber Reinforced Cement Composites (HPFRCC7)
Editor: H.W. Reinhardt, G.J. Parra-Montesinos, H. Garrecht
ISBN: 978-2-35158-145-2
e-ISBN: 978-2-35158-146-9
Publisher: RILEM Publications SARL
Publication year: 2015
Pages: 61-68
Total Pages: 8
Language: English

Abstract: The influences of impregnating multifilament carbon yarns in particle fillers slurry on the pullout behavior with cement-based matrix were studied. Several types of fillers were used based on silica in the nano and micro size and epoxy. The silica fume with micro size particles was found to provide the highest strength bond between the carbon yarn and the cementitious matrix among all tested fillers as well as the reference without any filler. In contrary, the nanosilica filler drastically reduced the bond strength between the carbon yarn and the cement matrix as compared with the reference. The epoxy filler did not show any beneficial effect on the pullout behavior which may attribute to its low mechanical properties as compared with the silica-based filler and the difference in the chemical nature, hydrophilic vs. hydrophobic, of the cementitious matrix and polymer. It can be concluded that coating of multifilament yarns with mineral fillers should be highly considered for textile reinforced concrete products, mainly when are of sufficient particle size that can stay inside the bundle spaces and exhibit pozzolanic reaction with the cement matrix. Another benefit of such mineral fillers can be expected under high temperatures and fire, which should be further explored.

Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00