Prediction of Nonlinear Stress-Strain Relationship of Lightly Stabilized Granular Materials from Unconfined Compression Testing
Publication: Journal of Materials in Civil Engineering
Volume 24, Issue 8
Abstract
This paper examines the nonlinear stress-strain behavior of lightly stabilized granular base materials and presents a method to predict them based on modified and extended Ramberg-Osgood expression from unconfined compression (UC) testing. A typical granular material was lightly stabilized with 0.5–3.0% cement-flyash (CF) as well as with 1.5–3.0% slag-lime (SL) and tested in UC with internal deformation measurement setup. This study indicates that the proposed mathematical model can accurately predict the nonlinear stress-strain relationships of the lightly stabilized materials obtained from the experiments. The parameters involved with the proposed model were initial elastic modulus , 0.2% proof stress , ultimate strain , and the exponents for quantifying the nonlinearity of the curves and . Values of all the parameters were determined from the experimental stress-strain responses and reliable regression relationships were developed between these parameters and unconfined compressive strength (UCS).
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Acknowledgments
The writers would like to thank Mr. David Sharp, Mr. Jim Baxter, and Mr. Mathew Barret for their technical assistance during the experimental work reported in this paper. The contributions of Blue Circle Southern Cement Pty Ltd for providing the slag-lime binder used in the lab testing are also acknowledged and appreciated.
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Information
Published In
Journal of Materials in Civil Engineering
Volume 24 • Issue 8 • August 2012
Pages: 1118 - 1124
Copyright
© 2012. American Society of Civil Engineers.
History
Received: Mar 6, 2011
Accepted: Dec 29, 2011
Published online: Jan 2, 2012
Published in print: Aug 1, 2012
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