EFFECT OF THERMAL CHANGES ON EXPANSION CAUSED BY ALKALI AGGREGATE REACTION IN A CONCRETE RETAINING WALL

Structural deterioration due to alkali-silica reaction (ASR) depends on not only the reactive aggregate or cement contained in concrete, but also on the environmental conditions under which the concrete structure is in service or under constraint. In this research, concrete cores were cut from an actual retaining wall that had deteriorated due to ASR. The cores were taken from drillholes extending from the front through back faces of the wall. The environmental conditions were then studied with respect to temperature and humidity by elemental analysis, strength test, and identification of temperature distribution. As a result, it was confirmed that temperature had a close relation to ASR, and that ASR caused outstanding cracking to a depth of 300mm from the front face of the retaining wall subjected to high temperature due to direct sunlight and that fluctuated in the 300-mm range.

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 907-920

Subject/Index Terms

Filing Info

  • Accession Number: 00964576
  • Record Type: Publication
  • ISBN: 0870311131
  • Report/Paper Numbers: SP-212-56
  • Files: TRIS
  • Created Date: Oct 22 2003 12:00AM