ABSTRACT
In Denmark research on alkali-silica reactivity and preventive measures has been carried out in two distinct phases. In the first phase, flint and opaline limestone were identified as the main reactive components in Danish aggregates. Suggested preventive measures were the use of low-alkali cement and/or the use of aggregates containing less than 2% reactive components. At this stage the basic assumptions were that the alkali content of concrete is determined by that of its cement and the alkalis are evenly distributed.
