DETERMINATION OF REALISTIC CUTOFF DATES FOR LATE-SEASON CONSTRUCTION WITH LIME-FLY ASH AND LIME-CEMENT-FLY ASH MIXTURES

The strength and durability of lime-fly ash and lime-cement-fly ash materials are known to be related to both temperature and time of curing. Combining these two variables into a single parameter, degree-days, provides a means for correlating tie and temperature to strength development of lime-fly ash and lime-cement-fly ash mixtures. Through the use of a theoretical heat-flow model and first-order weather station data, the curing temperatures of the materials in place were determined, and the degree-days expected for these materials under field curing were calcualted for the critical construction period. Cutoff dates were established as the last days that these materials could be placed and still have sufficient time for curing before the onset of freezing weather. A frequency analysis was made on the calcualted cutoff dates obtained from 20 years of weather data to establish realistic cutoff dates for placing stabilized materials on a probabilistic basis. The addition of small quantities of porland cement to the standard lime-fly ash mixture as an expedient for late-season construction appears beneficial. The frequency analysis of results from mixtures with the cement additive indicated that the construction season can be extended approximately 3 weeks in the Chicago area by the addition of small quantities of cement.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrr/1973/442/442-009.pdf
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309021731
• Supplemental Notes:
  • Publication of the 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:
  • MacMurdo, F D
  • Barenberg, E J
• Conference:
  • 52nd Annual Meeting of the Highway Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1973-1-22 to 1973-1-26
• Publication Date: 1973

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp. 92-101
• Monograph Title: Soil stabilization
• Serial:
  • Highway Research Record
  • Issue Number: 442
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Concrete curing; Cutoff walls; Durability; Fly ash; Lime cement; Lime fly ash; Portland cement; Strength of materials; Temperature; Time; Weather
• Old TRIS Terms: Cutoffs
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00159560
• Record Type: Publication
• ISBN: 0309021731
• Files: TRIS, TRB
• Created Date: Sep 20 1977 12:00AM