A study of mortars prepared with fly ash and silica fume for use in structures exposed to marine enviroments
DOI:
https://doi.org/10.3989/revmetalm.2003.v39.iExtra.1110Keywords:
Reinforced concrete corrosion, Special mixtures, Silica fume, Fly ash, Rapid chloride permeation, Mortar morphologyAbstract
The purpose of this study is to evaluate different mortar mixtures containing 5, 10 and 1 5% P/P silica fume and 5, 10, 12.5, 15 and 17.5% P/P fly ash to be used for repairing/constructing reinforced concrete structures exposed to marine environments. These were evaluated from the following standpoints: physical-chemical (capillary absorption and effective porosity); mechanical (compressive strength); electrochemical (lineal polarization, cyclic polarización and rapid chloride permeation); morphological (scanning electron microscopy). Results showed that 15 % silica fume mixture with no fly ash gave the best performance from both the physical-mechanical as well as the economic standpoint.
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