A RAPID TEST FOR DETECTING THE REACTIVITY OF AGGREGATES: THE MICROBAR METHOD

The procedure is a modified version of the autoclave method proposed by Tang et al. A reactivity threshold is proposed, of 0.11% expansion obtained for about 100 aggregates. The influence of several key parameters (nature of cement preparation of aggregates, operator or equipment switch) is reported. The chemistry of AAR in the conditions of the test is discussed. The Microbar method delivers a reliable verdict regarding alkali-silica or alkali-silicate reactivity. It has been adopted in France as a draft method under the number P 18-588. (A) For the covering abstract see IRRD 871351.

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 201-9

Subject/Index Terms

Filing Info

  • Accession Number: 00711223
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0-946691-46-1
  • Files: ITRD
  • Created Date: Sep 20 1995 12:00AM