STABILIZATION OF OKLAHOMA SHALES
Eight Oklahoma Shales representing regional characteristics but differing texturally and mineralogically were selected for stabilization studies. Of the various stabilizing agents used, it was found that 6% hydrated lime, 14% portland cement, and 25% flyash give optimum conditions by imparting acceptable strength levels to the shales. The degree of strength attained varies inversely with the plasticity of shales. On the basis of compressive strength, cyclic loading, and weatherability criteria cement is the most effective additive, flyash the least, and lime moderately effective. Combinations of the three stabilizing agents show that shales can be upgraded strengthwise when the three main stabilizing agents are used conjunctively; in fact, the data suggest that such uses are more economical and more promising. The addition of small amounts (less than 2%) of NaCl, CaCl2, NaOH, and Na2CO3 to the shales which have already been mixed with one of the main stabilizing agents, further enhances the stabilizing benification. With the exception of flyash stabilized shales, delayed compaction appears to produce an overall decrease in the compressive strength properties. Electron microscopic studies indicate that the voids of the stabilizing shales are reduced substantially compared to the raw shales and there is a direct relationship between void domain characteristics and stabilization effectiveness. Shales having higher void cross sectional areas show lower compressive strengths.
- Sponsored in part by Federal Highway Administration, Oklahoma City, Okla. Oklahoma Div.
University of Oklahoma, NormanOffice of Research Administration
Norman, OK USA 73019
Oklahoma City, OK USA 73105
Washington, DC USA 20590
- Laguros, J G
- Jha, K
- Publication Date: 1977-12
- Pagination: 281 p.
- TRT Terms: Calcium chloride; Calcium hydroxide; Calcium oxide; Cement; Fly ash; Oxides; Plasticity; Portland cement; Repeated loads; Shale; Sodium chloride; Sodium hydroxide; Sodium inorganic compounds; Soil stabilization; Strength of materials; Stresses; Void ratios
- Uncontrolled Terms: Triaxial stresses
- Geographic Terms: Oklahoma
- Old TRIS Terms: Sodium oxide; Void
- Subject Areas: Geotechnology; Highways;
- Accession Number: 00181394
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: OD0T-73-04-2 Final Rpt., ORA-158-602
- Files: NTIS, TRIS, USDOT
- Created Date: Oct 12 1979 12:00AM