Durability, Strength, and Stiffness of Dispersive Clay–Lime Blends
Publication: Journal of Materials in Civil Engineering
Volume 28, Issue 11
Abstract
Dispersive clays undergo deflocculation in the presence of relatively pure still water to form colloidal suspensions and as such are highly susceptible to erosion and piping. Lime treatment is one of the most practical methods to improve such undesirable characteristics of dispersive clays, as well as improve their mechanical properties. The present research aims to quantify the influence of amounts of hydrated lime, compacted dry unit weight, and curing time in the assessment of transformation to a nondispersive state by the lime treatment, as well as improving durability, strength, and stiffness properties of clay–lime mixtures. This manuscript advances understanding of the parameters controlling strength and stiffness of compacted lime-treated dispersive clay soil by quantifying the influence of porosity/lime index initial shear modulus () and unconfined compressive () and split tensile () strengths. A single relationship equal to 0.136 was found, being independent of the porosity/lime index and curing time. Unique relationships between and adjusted porosity/lime index of the dispersive clay soil–lime mixtures is shown for each curing time studied, linking initial stiffness and strength. Finally, while 2% of lime is enough to turn the dispersive clay studied herein into a nondispersive soil, it is quite clear that the minimum amount of lime for clay stabilization is 3%, at any dry unit weight, and this amount of lime definitely enhances both strength and stiffness. However, regarding durability, 5% is the amount of lime needed for guaranteeing endurance of the stabilized dispersive clay–lime blends.
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Acknowledgments
The authors wish to express their gratitude to CNPq (Brazilian Research Council) for the financial support to the research group. The authors would also like to thank the anonymous reviewers for the insightful comments that substantially improved the manuscript.
References
ABNT (Associaçāo Brasileira de Normas Técnicas). (1983). “Mortar and concrete—Test method for splitting tensile strength of cylindrical specimens.” NBR 7222-83, Rio de Janeiro, Brazil (in Portuguese).
ABNT (Associaçāo Brasileira de Normas Técnicas). (1996). “Standard test methods for wetting and drying compacted soil-cement mixtures.” NBR 13554-96, Rio de Janeiro, Brazil (in Portuguese).
ABNT (Associaçāo Brasileira de Normas Técnicas). (2010). “Mortar and concrete—Test method for compressive strength of cylindrical specimens.” NBR 5739-80, Rio de Janeiro, Brazil (in Portuguese).
ASTM. (2006). “Standard classification of soils for engineering purposes.” ASTM D2487-06, West Conshohocken, PA.
ASTM. (2007). “Standard test method for pore water extraction and determination of the soluble salt content of soils by refractometer.” ASTM D4542-07, West Conshohocken, PA.
ASTM. (2008). “Standard test method for laboratory determination of pulse velocities and ultrasonic elastic constants of rock.” ASTM D2845-08, West Conshohocken, PA.
ASTM. (2010). “Standard test method for compressive strength of cylindrical concrete specimens.” ASTM C39-10, West Conshohocken, PA.
ASTM. (2011a). “Standard specification for quicklime, hydrated lime, and limestone for environmental uses.” ASTM C1529-06, West Conshohocken, PA.
ASTM. (2011b). “Standard test method for splitting tensile strength of cylindrical concrete specimens.” ASTM C496, West Conshohocken, PA.
ASTM. (2013). “Standard test methods for identification and classification of dispersive clay soils by the pinhole test.” ASTM D4647-13, West Conshohocken, PA.
Carneiro, F. L. L. B., and Barcellos, S. A. (1953). “Concrete tensile strength.” R.I.L.E.M. Bulletin, 13, 97–107.
Clayton, C. R. I., and Khatrush, S. A. (1986). “A new device for measuring local axial strain on triaxial specimens.” Géotechnique, 36(4), 593–597.
Clough, G. W., Sitar, N., Bachus, R. C., and Rad, N. S. (1981). “Cemented sands under static loading.” J. Geotech. Eng. Div., 107(6), 799–817.
Consoli, N. C., Consoli, B. S., and Festugato, L. (2013). “A practical methodology for the determination of failure envelopes of fiber-reinforced cemented sands.” Geotext. Geomembr., 41, 50–54.
Consoli, N. C., Dalla Rosa, A., Corte, M. B., Lopes, L. S. Jr, and Consoli, B. S. (2011a). “Porosity-cement ratio controlling strength of artificially cemented clays.” J. Mater. Civ. Eng., 1249–1254.
Consoli, N. C., Dalla Rosa, A., and Saldanha, R. B. (2011b). “Variables governing strength of compacted soil–fly ash–lime mixtures.” J. Mater. Civ. Eng., 432–440.
Consoli, N. C., Lopes, L. S., Jr., and Heineck, K. S. (2009a). “Key parameters for the strength control of lime stabilized soils.” J. Mater. Civ. Eng., 21(5), 210–216.
Consoli, N. C., Prietto, P. D. M., Carraro, J. A. H., and Heineck, K. S. (2001). “Behavior of compacted soil-fly ash-carbide lime-fly ash mixtures.” J. Geotech. Geoenviron. Eng., 774–782.
Consoli, N. C., Thomé, A., Donato, M., and Graham, J. (2008). “Loading tests on compacted soil bottom ash and lime layers.” Proc. Inst. Civ. Eng. Geotech. Eng., 161(1), 29–38.
Consoli, N. C., Viana da Fonseca, A., Cruz, R. C., and Heineck, K. S. (2009b). “Fundamental parameters for the stiffness and strength control of artificially cemented sand.” J. Geotech. Geoenviron. Eng., 1347–1353.
Hilt, G. H., and Davidson, D. T. (1960). “Lime fixation in clayey soils.” HRB Bull., 262, 20–32.
La Rochelle, P., Leroueil, S., Trak, B., Blais-Leroux, L., and Tavenas, F. (1988). “Observational approach to membrane and area corrections in triaxial tests.” ASTM STP 977—Advanced Triaxial Testing of Soil and Rock, R. T. Donaghe, R. C. Chaney, and M. L. Silver, eds., ASTM, West Conshohocken, PA, 715–731.
Mitchell, J. K. (1981). “Soil improvement–State-of-the-art report.” Proc., 10th Int. Conf. on Soil Mechanics and Foundation Engineering, Vol. 4, International Society of Soil Mechanics and Foundation Engineering, A.A. Balkema, Rotterdam, Netherlands, 509–565.
Popovics, S. (1998). Strength and related properties of concrete: A quantitative approach, Wiley, Hoboken, NJ.
Popovics, S., and Ujhelyi, J. (2008). “Contribution to the concrete strength versus water-cement ratio relationship.” J. Mater. Civ. Eng., 459–463.
Schnaid, F., Prietto, P. D. M., and Consoli, N. C. (2001). “Characterization of cemented sand in triaxial compression.” J. Geotech. Geoenviron. Eng., 857–868.
Sherard, J. L., Dunnigan, L. P., and Decker, R. S. (1976). “Identification and nature of dispersive soils.” J. Geotech. Eng. Div., 102(GT4), 287–301.
Thomé, A., Donato, M., Consoli, N. C., and Graham, J. (2005). “Circular footings on a cemented layer above weak foundation soil.” Can. Geotech. J., 42(6), 1569–1584.
USBR (U.S. Bureau of Reclamation). (1998). Earth manual—Part 1, 3rd Ed., U.S. Dept. of the Interior–Bureau of Reclamation, Technical Service Center, Denver, 329.
Viana da Fonseca, A., Cruz, R. C., and Consoli, N. C. (2009). “Strength properties of sandy soil-cement mixtures.” Geotech. Geol. Eng., 27(6), 681–686.
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Published In
Journal of Materials in Civil Engineering
Volume 28 • Issue 11 • November 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Jun 7, 2015
Accepted: Feb 29, 2016
Published online: Jun 2, 2016
Published in print: Nov 1, 2016
Discussion open until: Nov 2, 2016
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