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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Interfacial properties of steel fiber at mortars with different water and binder ratios: backscattered electron image analysis and nanoindentation testing
Author(s): Siaw Foon Lee, Xiao Hui Wang, Stefan Jacobsen
Appears on pages(s): 127-142
Keywords: Steel fiber-reinforced mortar, Backscattered electron image analysis, Nanoindentation, Interfacial transition zone.
Abstract:Backscattered electron image analysis (BSE-IA) and nanoindentation were adopted to study the properties in the interfacial transition zone (ITZ) of steel fiber with a diameter of 0.16 mm. Mortars with three different water and binder (w/b) ratios were made. A good sample preparation procedure that gave a surface roughness of less than 1 μm was used. It was found that the thickness of ITZ of steel fiber was 30 μm. BSE-IA and nanoindentation testing revealed that mortars with w/b 0.3 had less area % of porosity and higher hardness and elastic modulus at the ITZ than mortars with w/b 0.5. BSE-IA also showed that silica fume 10 % by cement weight did not densify the porosity in the ITZ as expected. This was in line with nanoindentation result which showed that mortar with 0 % silica fume had better interfacial bonding than mortar with 10 % silica fume for w/b 0.3.
Norwegian Concrete Association, International Partner Access.
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