ALKALI - AGGREGATE REACTIONS AND THE MIDDLE EAST

This article considers the deterioration of concrete structures because of the decomposition of the concrete from which they are made. It is suggested that the reason for deterioration is often the reaction between the aggregate and the cement paste. Good aggregates are especially difficult to find in the middle east, and the authors quote examples from this region in a discussion of the problem. Examples are quoted of the effects of alkali-silica reaction and alkali-carbonate reaction, and the results obtained when sections of damaged concrete were examined with A petrological microscope are discussed. A detailed examination of existing concrete structures in the area of proposed works is considered to be a valuable means of judging the performance of local aggregates, and a possible scheme of technical investigation is illustrated by means of a flow diagram. In particular, detailed petrographic, mineralogical and chemical data when compared with similar data already available for reactive aggregates may provide the most satisfactory means of identification of potentially reactive material. /TRRL/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00105317
• Corporate Authors:

  Cement and Concrete Association

  52 Grosvenor Gardens
  London SW1W 0AQ,   England 
• Authors:
  • FRENCH, W J
  • Poole, A B
• Publication Date: 1976-1

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 18-20
• Serial:
  • CONCRETE
  • Volume: 10
  • Issue Number: 1
  • Publisher: THE CONCRETE SOCIETY
  • ISSN: 0010-5317

Subject/Index Terms

• TRT Terms: Aggregates; Alkali; Alkali aggregate reactions; Carbonates; Cement paste; Chemical reactions; Concrete; Concrete structures; Deterioration; Developing countries; Durability; Geological surveying; Oxides; Petrography; Reactive aggregates; Silicon; Structures
• Geographic Terms: Africa; Asia; Europe
• Old TRIS Terms: Aggregate characteristics; Alkalies; Petrographic investigations
• ITRD Terms: 8001: Africa; 4577: Aggregate; 7353: Alkali; 8005: Asia; 7312: Carbonate; 4767: Cement paste; 4755: Concrete; 5255: Deterioration; 150: Developing countries; 3355: Engineering structure; 8034: Europe; 7372: Oxide; 7156: Reaction (chem); 7148: Silicon
• Subject Areas: Bridges and other structures; Geotechnology; Highways; I36: Aggregates;

Filing Info

• Accession Number: 00134219
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Sep 4 1976 12:00AM