Use of scratch tracking method to study the dissolution of alpine aggregates subject to alkali silica reaction

Alkali silica reaction (ASR) can significantly affect the service life of concrete. The dissolution of aggregates has a direct impact on gel formation and thus on the macroscopic expansion. The conventional expansion tests and other investigations confirmed ASR reactivity of three aggregates from di...

Full description

Saved in:
Bibliographic Details
Published inCement & concrete composites Vol. 124; p. 104260
Main Authors Bagheri, Mahsa, Lothenbach, Barbara, Shakoorioskooie, Mahdieh, Leemann, Andreas, Scrivener, Karen
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.11.2021
Subjects
Aggregate dissolution
Alkali effect
ASR expansion
The scratch-tracking method
ASR expansion
Alkali effect
Aggregate dissolution
The scratch-tracking method
Online AccessGet full text

Cover

More Information
Summary:Alkali silica reaction (ASR) can significantly affect the service life of concrete. The dissolution of aggregates has a direct impact on gel formation and thus on the macroscopic expansion. The conventional expansion tests and other investigations confirmed ASR reactivity of three aggregates from different locations in Switzerland. The reactive minerals within alpine and composite aggregates were identified using an innovative scratch-tracking method. This method helps to study aggregate dissolution if measuring the amount of released Si is not enough, because: several minerals release Si or Al and/or new phases are probable to form during dissolution experiment. The scratch-tracking method on theses alpine aggregates showed faster dissolution of feldspars and quartz while muscovite was hardly affected. The dissolution of the aggregates in solution confirmed these differences between minerals.
ISSN:0958-9465
1873-393X
DOI:10.1016/j.cemconcomp.2021.104260