Abstract:
Work is going on in several countries to try to develop a reliable performance testing concept for
ASR. This topic was also focused on in the Norwegian R&D project "COIN" (2007-2014). The work was
closely linked to the work within RILEM TC 219-ACS (2006-2014).
This paper gives a summary of the main findings in the COIN program. The main aim of part I (PhD
study) was to document the effect of various curing – and storage conditions on the concrete internal
moisture state, the extent of alkali leaching and ASR related expansion. The study documented that the main
parameter controlling the ASR expansion measured in the laboratory is extent of alkali leaching.
Based on the findings in part I, a comprehensive follow-up study (part II) has been performed. 20
different concrete mixtures, including six aggregate types and four cement types, have been performance
tested according to the most promising test procedures in part I. Moreover, two field exposure sites have
been established in order to document the laboratory/field correlation, one in Norway (at SINTEF) and one
in Portugal (at LNEC).