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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: Mix design and the effect of silica fume and steel fiber on rheological and mechanical properties of mortars
Author(s): Siaw Foon Lee, Xiao Hui Wang, Stefan Jacobsen
Appears on pages(s): 33-50
Keywords: Mortar, silica fume, steel fiber, rheological, mechanical properties, air-void content.
Abstract:Mortars with water and binder ratio (w/b) 0.3 and 0.5, with and without 10% silica fume by cement weight and with 0, 0.3 and 1 vol% steel fibers were made to study the effect of silica fume and steel fiber on rheological and mechanical properties. Slump, yield stress and plastic viscosity of fresh mortars were measured. Three-point bending and compressive tests were performed on the mortars after 28-day curing. It was found that silica fume improved the cohesiveness of fresh mortars, increased the compressive strength but showed no obvious effect on the bending strength for both w/b either with or without 0.3 vol% steel fiber. The inclusion of 0.3 vol% steel fiber greatly affected the workability of fresh mortars with w/b 0.3 without silica fume compared to that with silica fume, and gave no effect on mortars with w/b 0.5. 10% silica fume and 0.3 vol% steel fiber increased the air-void content slightly. However, plots of strength as function of air void content over a small range did not show that air void gave a general reduction of strength.
Norwegian Concrete Association, International Partner Access.
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