Study of the alkali-silica reaction rate of Spanish aggregates. Proposal of a classification based in accelerated mortar bars tests and petrographic parameters

The alkali-silica reaction has been studied in depth due to the evolution knowledge of expansive phenomenon. One its most important aspects is rate aggregates. In Spain, at early 90s 20th century, aggregates were considered almost non-reactive. However, use accelerated curing and other environmental factors revealed that there potentially reactive siliceous Nevertheless, are several limestone with inclusions show reactivity over long period. present work, open porosity, expansion petrography quartz index have determined, 68 siliceous, dolomitic aggregates, from quarries located areas diagnostic reactivity. Based on these parameters their interrelation, a classification method proposed detect slow-reacting