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

• Main Authors: Aldea, B. (Author), García-Roves, R. (Author), Menéndez, E. (Author), Puerto, E. (Author), Recino, H. (Author)
• Format: Article
• Language: English
• Published: CSIC Consejo Superior de Investigaciones Cientificas 2022
• Subjects: 20th century; Aggregates; Alkali-silica reaction; Environmental factors; E-studio; Lime; Limestone; Mortar bar test; Mortar bars; Petrography; Quartz; Quartz reactivity index; Reaction rate; Reaction rates; Reactions rates; Reactivity indices; Spanish aggregate; Spanish aggregates
• Online Access: View Fulltext in Publisher

 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. © 2021 CSIC. This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) License.