| dc.description.abstract | In cooperation with the Oklahoma Department of Transportation and the
Federal Highway Administration, U.S. Department of Transportation, a research
project entitled "Field Application of the Stabilization of Oklahoma Shales"
(ODOT Study 79-09-2, ORA 158-867) was undertaken on June 1, 1979 by the
University of Oklahoma.
Initially, the Boggy shale in Atoka County was selected to be field
stabilized. Later on, however, and because of seasonal limitations imposed
on construction this site was abandoned for another site west of Enid. The
laboratory work envisioned in Phase I had progressed to the point that it was
considered prudent to continue and complete this effort. This Progress Report
No. 1 presents the findings of this laboratory work.
The stabilizing agents used were 12% portland cement, 5% hydrated lime,
and 25% fly ash. The curing conditions were 28 days moist curing at 70 F and
100 F, and two compaction conditions were employed: no delay and 2 hours
delay. The effectiveness of stabilization was evaluated in terms of the shear
strength parameters of cohesion and internal angle of friction determined
through triaxial compressive and direct shear strength tests as well as
plasticity.
Cement stabilization imparted maximum strength gain into shale with lime
and fly ash giving lower but adequate strengths. Higher temperatures, namely
110 F, increased the effectiveness of stabilization but delayed compaction
tended to slightly decrease it. | |
