Abstract
The use of condensed silica fume (CSF) causes a reduction of Na +, K + and OH − ion concentration of the pore solution of cement paste and concrete samples. Expansion tests also showed that CSF reduces expansion caused by alkali-silica reactive rock in mortar bars and concrete prisms. The reduction of expansion seems to be proportional to the amount of CSF used. For a given amount of CSF, however, the reduction of expansion of the concrete prisms appears to be greater than the observed reduction of Na +, K + and OH − ions in pore solution would predict.
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