Performance of binary and ternary cement mixtures based in metakaolin and silica fume
Keywords:
Corrosion, Durability, Permeation, Metakaolin, Silica fumeAbstract
The effects of metakaolin and silica fume onvarious properties of mortars were evaluated andcompared in this study. Mortars were cast with 0,5 and 10 percent cement replaced by metakaolin(MK) and/or silica fume (SF). The compressivestrength and durability properties, such asabsorption and porosity, chloride permeabilityand sulphate attack resistance, were evaluated.Corrosion of steel reinforcement into these mortarswas studied using the techniques of half-cellpotential, linear polarization resistance and Tafelslopes. Mixtures containing 10% SF and 5% MKreported a compressive strength 40% higher thanthe mortar without addition and an excellentperformance in the presence of chlorides andsulphates. The mixture containing 10% MK and10% SF presented the best performance to steelcorrosion.
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References
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