THE POTENTIAL ALKALI-AGGREGATE REACTIVITY IN ITALY: COMPARISON OF SOME METHODS TO TEST AGGREGATES AND DIFFERENT CEMENT-AGGREGATE COMBINATIONS --PROCEEDINGS OF THE 7TH INTERNATIONAL CONFERENCE ON CONCRETE ALKALI-AGGREGATE REACTIONS, OTTAWA, CANADA, 1986

The alkali reactivity of an Italian aggregate, coming from an area where severe alkali-aggregate reactions recently occurred, was evaluated by petrographic and chemical analyses, infrared spectroscopy and gel-pat tests. In addition, combinations of this aggregate with three portland cements with increasing alkali content were tested in mortars and concretes according to ASTM, rilem and Canadian test methods. A comparative, critical analysis of the results made it possible to select the test methods that best characterize the potential alkali reactivity of Italian cement-aggregate combinations. The chemical method ASTM C 289 was found to be unreliable; infrared spectroscopy was better. As regards evaluating the reactivity of the cement-aggregate combinations, the mortar bar method suggested by rilem appeared to be the most exhaustive; this method also ascertained how much reactive aggregate could be used with the cements tested without causing undue alkali-aggregate reaction. For the covering abstract of the conference see IRRD 811982.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0815511426
• Corporate Authors:

  NOYES PUBLICATIONS

  MILL ROAD
  Park Ridge, NJ  United States 
• Authors:
  • Berra, M
  • Baronio, G
• Publication Date: 1987

Language

• English

Media Info

• Pagination: p. 231-6
• Serial:
  • Publication of: NOYES PUBLICATIONS
  • Publisher: NOYES PUBLICATIONS

Subject/Index Terms

• TRT Terms: Aggregates; Alkali; Cement; Chemical analysis; Chemical reactions; Colloids; Concrete; Conferences; Cracking; Electromagnetic spectrum; Evaluation and assessment; Expansion; Infrared radiation; Mortar; Oxides; Petrography; Silicon
• Geographic Terms: Italy
• Subject Areas: Data and Information Technology; Geotechnology; Planning and Forecasting;

Filing Info

• Accession Number: 00481146
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• ISBN: 0-8155-1142-6
• Files: ITRD, TRIS
• Created Date: Apr 30 1989 12:00AM