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.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/0946691461
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Corporate Authors:
THE CONCRETE SOCIETY
FRAMEWOOD ROAD
WEXHAM, United Kingdom SL3 6PJ -
Authors:
- CRIAUD, A
- VERNET, C
- DEFOSSE, C
- Conference:
- Publication Date: 1992
Language
- English
Media Info
- Features: References;
- Pagination: p. 201-9
Subject/Index Terms
- TRT Terms: Aggregates; Alkali; Cement; Chemical reactions; Concrete; Conferences; Oxides; Silicon; Test procedures
- Uncontrolled Terms: Reproducibility
- ITRD Terms: 4577: Aggregate; 7353: Alkali; 4758: Cement; 4755: Concrete; 8525: Conference; 7372: Oxide; 7156: Reaction (chem); 5927: Reproducibility; 7148: Silicon; 6288: Test method
- Subject Areas: Data and Information Technology; Geotechnology;
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