Abstract
In this study, the bond properties between macrosynthetic fibres and latex polymer modified cement composites (LMCCs) were evaluated at different nanosilica and silica fume (microsilica) contents. The bond tests were evaluated according to Japan Concrete Institute SF-8, in which the nanosilica and silica fume contents in the cement were set to 0, 2, 4, 6 8, or 10%, based on cement weights. The addition of nanosilica and silica fume significantly influenced the bond properties between macrosynthetic fibres and LMCCs. Both bond strength and interface toughness improved with increasing silica fume content up to 10%. Both bond strength and interface toughness increased with nanosilica content up to 6% and then decreased with nanosilica content of 8% or more. This result was confirmed by observing an increase in scratching due to friction forces. This study was validated using microstructural analysis of torn macrosynthetic fibres after the bond tests.
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