Abstract:
A kinetic based comparison between expansion tests for alkali-aggregate reactivity was
carried out deriving critical rates from test criteria, in an earlier paper. The present paper checks the
assumptions and models of such earlier comparison against results with real aggregates varying in
alkali reactivity. Using the same approach, for each aggregate, expansion rates for three expansion
tests were estimated, corrected for alkalinity and depicted as an Arrhenius plot. The relationship
used data from NF P18-590, ASTM C 1260 and ASTM C 227 tests and shows linear Arrhenius
plots for several aggregates, aligned almost parallel to the line obtained for test criteria. Aspects
related to the different experimental conditions on test-methods and their effects are discussed. The
proposed conclusion is that both standards and aggregate results, at the given conditions, are not
inconsistent under the kinetic point of view. Some suggestions are made for improving the accuracy
of the relationship obtained.
