SOME FACTORS AFFECTING THE DURABILITY OF LIME-FLY ASH-AGGREGATE MIXTURES

Lime-fly ash-aggregate (LFA) mixtures have proved to be effective and economical paving materials. In certain instances, however, these materials show a tendency to deteriorate slowly with time under severe service conditions. The objective of this study was to evaluate some of the important factors believed to influence the durability of LFA mixtures and to determine whether control of these variables can produce a more durable product. Specifically, the effect of the following parameters on the durability of LFA mixes was studied: aggregate gradation, line plus fly ash content, and saturation. Strength and durability of the various mixes were evaluated by using standard procedures outlined in ASTM C593-69. Durability was determined by the weight loss exhibited by the specimens during 12 standard freeze-thaw cycles. Results indicate that (a) for maximum durability the mix should have sufficient fines (material passing No. 4 sieve) to float the coarser aggregate particles, (b) the ratio of lime plus fly ash to fine aggregate is optimum in the range of 1:4 to 1:7, (c) durability generally increase with increased curing, (d) most mixes used in current practice have insufficient fly ash for optimum mix proportions, and (e) the effect of saturation is dependent on the freezing rate and freezing conditions. The results provide background information for design of LFA mixes to give optimum performance.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1976/560/560-001.pdf
• Summary URL:
  • https://scholar.google.com/scholar_lookup?title=SOME+FACTORS+AFFECTING+THE+DURABILITY+OF+LIME-FLY+ASH-AGGREGATE+MIXTURES&author=R.+Andres&author=R.+Gibala&author=E.+Barenberg&publication_year=1976
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• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Lime and Lime-Fly Ash Stabilization. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Andres, R J
  • Gibala, R
  • Barenberg, E J
• Conference:
  • 54th Annual Meeting of the Transportation Research Board
  • Location: Washington District of Columbia
  • Date: 1975-1-13 to 1975-1-17
• Publication Date: 1976

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 1-10
• Monograph Title: Stabilization
• Serial:
  • Transportation Research Record
  • Issue Number: 560
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Aggregate gradation; Aggregate mixtures; Concrete curing; Durability; Freeze thaw tests; Lime fly ash; Paving materials; Percent saturation; Strength of materials
• Old TRIS Terms: Paving mixtures
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00133995
• Record Type: Publication
• ISBN: 0309024706
• Files: TRIS, TRB
• Created Date: Jul 22 1976 12:00AM