Abstract
The reported results of chemical tests for potential reactivity of concrete aggregates from some of the largest hydraulic structures showed that the virtur of the chemical method lies in its practicality and adequate reliability. An evaluation of the chemical test results for potentially reactive aggregates must take into account both the amount of dissolved silica SC, and the extent of reduced alkalinity RC. This is corroborated by comparative experiments on test bars and by a sufficiently close correlation function between SC and RC values. When carbonaceous rocks, clays, magnesium silicates (serpentines), and gypsum are present in aggregates, distorting the chemical test results, additional bar test of aggregates are necessary.
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