Assessing aggregates for alkali-aggregate reaction potential


Fernandes I., Andic-Cakir O. , Hooton D.

PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-CONSTRUCTION MATERIALS, vol.169, no.3, pp.172-178, 2016 (Journal Indexed in ESCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 169 Issue: 3
  • Publication Date: 2016
  • Doi Number: 10.1680/jcoma.15.00060
  • Title of Journal : PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-CONSTRUCTION MATERIALS
  • Page Numbers: pp.172-178

Abstract

The identification of alkali-reactive aggregates has been a challenge since alkali-aggregate reactions were first diagnosed. Standards, test methods and recommendations have been developed on a local and international basis. The Rilem recommendations regarding alkali-aggregate reactions are based on a methodology in which a series of laboratory tests is suggested. The assessment starts with a petrographic examination of the aggregate, followed by rapid screening tests and concrete expansion tests. This methodology has been carried out by a number of laboratories worldwide. However, some of the tests have not been totally satisfactory as sometimes the results do not correlate with each other or with field performance. A summary of the thresholds, advantages and limitations of each test according to the findings of Rilem TC 219-ACS is presented.