Stiffness Performance of Chemically Treated Sulfate-Rich Clay via Resonant Column Testing
Publication: Geo-Congress 2024
ABSTRACT
Chemical treatment of expansive sulfate-rich soils, particularly lime- and cement-based methods, has been rather popular in practice due to its relatively low cost and ready availability of these chemical additives. The present work was aimed at gaining crucial insights into the potential effects of lime- and cement-based treatments on the stiffness and damping properties of sulfate-rich clayey soils. To this end, a series of resonant column (RC) tests were conducted on chemically stabilized specimens of a highly plastic, sulfate-rich clay from Sherman, Texas. RC test results were analyzed to assess the influence of chemical stabilizer dosages, curing times, and confining pressures on the small-strain shear modulus (Gmax), small-strain damping ratio (Dmin), and normalized shear moduli (G/Gmax) of treated soil. Chemical treatments included 3% cement + 2% fly ash, and 6% lime + 4% fly ash. Test results show a detrimental effect of cement + fly ash treatment method on soil stiffness, rendering 6% lime + 4% fly ash as a potentially feasible method with curing times longer than 14 days.
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REFERENCES
Borden, R. H., Shao, L., and Gupta, A. (1996). “Dynamic properties of Piedmont residual soils.” Journal of Geotechnical Engineering, 122(10), 813–821.
Das, B. M. (1993). Principles of Soil Dynamics, PWS-KENT Pubs., Boston, Massachusetts.
GCTS Testing Systems. (2015). TSH-100: User’s Guide and Reference. Geotech. Consulting & Testing Systems, L.L.C., Tempe, Arizona.
Hunter, D. (1988). “Lime-induced heave in sulfate-bearing clay soils.” J. Geotech. Engrg., ASCE, 114(2), 150–167.
Kota, P. B. V. S., Hazlett, D., and Perrin, L. (1996). “Sulfate-bearing soils: problems with calcium based stabilizers.” Transp. Res. Rec. No. 1546, Transp. Res. Board, Washington, D.C.
Kramer, S. L. (1996). Geotechnical Earthquake Engineering, Prentice-Hall, New Jersey, N.J.
Mitchell, J. K., and Dermatas, D. (1990). “Clay soil heave caused by lime-sulfate reactions.”, ASTM, 41-64.
Nelson, D. J., and Miller, J. D. (1992). Expansive soils: Problems and Practice in Foundation and Pavement Engineering, Wiley, NY.
Petry, M. T., and Little, N. D. (1992). “Update on sulfate-induced heave in treated clays: problematic sulfate levels.” Transp. Res. Rec. No. 1362, Transp. Res. Board, Washington, D.C., 51–55.
Prakash, S. (1981). Soil Dynamics, McGraw-Hill, New York, N.Y.
Rollings, R. S., Burkes, J. P., and Rollings, M. P. (1999). “Sulfate attack on cement-stabilized sand.” J. Geotech. and Geoenvir. Engrg., ASCE, 125(5), 364–372.
Information & Authors
Information
Published In
Geo-Congress 2024
Pages: 60 - 66
History
Published online: Feb 22, 2024
ASCE Technical Topics:
- Chemical additives
- Chemical compounds
- Chemical treatment
- Chemicals
- Chemistry
- Clays
- Cooling (wastewater treatment)
- Engineering fundamentals
- Engineering materials (by type)
- Environmental engineering
- Geomechanics
- Geotechnical engineering
- Materials engineering
- Pollution
- Salts
- Soil cement
- Soil mechanics
- Soil modulus
- Soil pollution
- Soil properties
- Soil tests
- Soil treatment
- Soils (by type)
- Sulfates
- Tests (by type)
- Waste management
- Waste treatment
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