Open AccessStudy of the alkali-silica reaction rate of Spanish aggregates. Proposal of a classification based in accelerated mortar bars tests and petrographic parameters
Author(s) -
Esperanza Menéndez,
Ricardo García-Rovés,
Beatriz Aldea,
E. Puerto,
Hairon Recino
Publication year - 2021
Publication title -
materiales de construcción
Language(s) - English
Resource type - Journals
eISSN - 1988-3226
pISSN - 0465-2746
DOI - 10.3989/mc.2021.13421
Subject(s) - petrography , expansive , alkali–silica reaction , quartz , reactivity (psychology) , mortar , porosity , curing (chemistry) , mineralogy , geology , reaction rate , materials science , chemical engineering , chemistry , composite material , geotechnical engineering , organic chemistry , compressive strength , catalysis , medicine , alternative medicine , pathology , engineering
The alkali-silica reaction has been studied in depth due to the evolution in the knowledge of the expansive phenomenon. One of its most important aspects is the reaction rate of the aggregates. In Spain, at the early 90s of the 20th century, aggregates were considered almost non-reactive. However, the use of accelerated curing and other environmental factors revealed that there were potentially reactive siliceous aggregates. Nevertheless, there are several siliceous and limestone aggregates with siliceous inclusions that show reactivity over long period. In the present work, open porosity, expansion and petrography with quartz reactivity index have been determined, in 68 siliceous, limestone and dolomitic aggregates, from quarries located in areas with diagnostic reactivity. Based on these parameters and their interrelation, a classification method is proposed to detect slow-reacting aggregates.