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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    Elsevier

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

Language

  • English

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