INVESTIGATION OF ACCELERATED CURING OF SOIL-LIME AND LIME-FLY ASH-AGGREGATE MIXTURES

The objectives of this investigation were to examine current mix design procedures for soil-lime and lime-fly ash-aggregate mixtures and to develop accelerated curing test procedures for estimating long-term field strengths. Unconfined compression tests were conducted on Vicksburg silt (ML) plus 3 and 5 percent lime, Vicksburg buckshot clay (CH) plus 5 and 8 percent lime, and 90 percent clay gravel and 90 percent sandy gravel plus 3 or 6 percent fly ash, respectively. Representative groups of specimens were normally cured at 50 F and 72 F each for 7, 28, and 56 days, while other groups were accelerated cured 1, 3, and 5 days at 90 F, 105 F, and 120 F each. The soil-lime mixtures could be judged to be reactive or nonreactive. Accelerated curing times equivalent to 28-day normal-cure strengths depended upon curing temperature, soil type, and to a lesser extent on lime content or lime: fly ash ratio. Hence, no universally applicable equivalent 28-day curing time exists for accelerated-cured soil-lime or lime-fly ash-aggregate mixtures. Because none of the existing 'maturity' rules for concrete were found to be applicable to soil-lime mixtures, a method was developed based upon normal-cure 7-day and accelerated-cured 105 F strengths for estimating 28-day strengths. Procedures for mix design evaluation of soil-lime and lime-fly ash-aggregate mixtures are presented.

• Corporate Authors:

  U.S. Army Waterways Experiment Station

  3909 Halls Ferry Road
  Vicksburg, MS  United States  39180-6199
• Authors:
  • Townsend, F C
  • Donaghe, R T
• Publication Date: 1976-8

Media Info

• Pagination: 129 p.

Subject/Index Terms

• TRT Terms: Accelerated tests; Acceleration (Mechanics); Additives; Aggregate mixtures; Calcium oxide; Concentration (Chemistry); Concrete curing; Fly ash; High temperature; Lime fly ash; Mix design; Mixtures; Soil lime mixtures; Soil stabilization; Soils; Strength of materials; Temperature; Time
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00146420
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: WES-TR-S-76-9 Final Rpt.
• Files: TRIS, ATRI
• Created Date: Jan 16 1977 12:00AM