LONG-TERM EFFECTIVENESS AND MECHANISM OF LIOH IN INHIBITING ALKALI-SILICA REACTION

Excess expansion and cracking of concrete occurs when some of the alkali reactive rocks are used as coarse aggregate in concrete made with high-alkali cement. Although lithium compounds are one of the techniques used to reduce the effects of alkali-silica reaction ASR), the long-term effectiveness has not been tested thoroughly and the evidence to prove such effects is also lacking. This article used a practical alkali reactive aggregate-Beijing aggregate to test the long-term effectiveness of LiOH in inhibiting alkali-aggregate reaction (AAR) expansion. The mortar bars used had been cured at 80 deg C. for 3 years after being autoclaved for 24 h at 150 deg C. Under these conditions, LiOH was able to inhibit long-term alkali-silica reaction (ASR) expansion effectively. The authors include electron micrographs that illustrate the processes under discussion.

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• Corporate Authors:

  Elsevier

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  Kidlington, Oxford  United Kingdom  OX5 1GB
• Authors:
  • Mo, Xiangyin
  • Yu, Chenjie
  • Xu, Z
• Publication Date: 2003-1

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 115-119
• Serial:
  • Cement and Concrete Research
  • Volume: 33
  • Issue Number: 1
  • Publisher: Elsevier
  • ISSN: 0008-8846
  • Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

• TRT Terms: Alkali aggregate reactions; Alkali silica reactions; Concrete; Electron microscopy; Expansion; Lithium; Mortar; Service life
• Subject Areas: Design; Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00986465
• Record Type: Publication
• Files: TRIS
• Created Date: Feb 8 2005 12:00AM