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.
U.S. Army Waterways Experiment Station3909 Halls Ferry Road
Vicksburg, MS USA 39180-6199
- Townsend, F C
- Donaghe, R T
- Publication Date: 1976-8
- Pagination: 129 p.
- 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;
- 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