Quantification of glassfibre - cement interfacial properties by SEM-based push-out test

Author(s): M.A. Glinicki, A.M. Brandt
Paper category: Workshop
Book title: Fifth International RILEM Workshop on High Performance Fiber Reinforced Cement Composites (HPFRCC5)
Editor(s): H.W. Reinhardt, A.E. Naaman
ISBN: 978-2-35158-046-2
Pages: 343 - 350
Total Pages: 8
Language: English

Abstract: 
The toughness of cement composites reinforced with glassfibres (GFRC) is known to degrade in the long term in spite of high alkali resistance of fibres. The stability of fibrematrix interface is a key factor for high performance composites. For the interfacial characterization of glassfibre and cement composites SEM-based push out tests were performed. The materials studied included strands of zirconia glass filaments of diameters ranging from 13 to 15 μm and cementitious matrices modified with mineral additives. The push-out tests were performed on thin slices of about 450-600 μm, cut out of the specimens perpendicularly to the direction of the glass filaments. During testing a continuous recording of load and displacement of a fibre was performed at a constant push velocity of about 0.2 μm/s. Test results revealed significant differences due to introduced matrix modifications as well as to ageing of the specimens. Both stress-based approach and energy-based approach was applied for characterization the interfacial properties.

Online publication: 2014
Publication Type: full_text
Public price (Euros): 0.00