Empirical Relationships with Unconfined Compressive Strength and Split Tensile Strength for the Long Term of a Lime-Treated Silty Soil
Publication: Journal of Materials in Civil Engineering
Volume 30, Issue 8
Abstract
Fine-grained soils have a low load-bearing capacity that hinders their use in pavement construction, slope protection, or foundation support. Therefore, the chemical stabilization of a soil with the addition of lime is a viable technique that could enable its use in civil construction. Unconfined compressive strength (UCS) and split tensile strength tests were performed to evaluate the improvement of a soil with lime and the existing correlation between these two tests. This study aims to determine the empirical relationships between the split tensile strength () and UCS () of a silty soil artificially cemented with hydrated lime (). To calculate the ratio, soil–lime specimens are molded by controlling the dry unit weight, lime content, porosity, and water content, followed by curing for 15, 30, 60, 90, and 180 days. The voids/lime relationship determined by the porosity/volumetric lime content ratio () plays an essential role in this study, and it is the principal parameter used to assess the increases in and and determine their empirical relationship. The results demonstrate that for all curing times (15–180 days), so that it is an overall constant relationship (). Moreover, with the addition of 9% lime, maximum resistances of (700 kPa) and (3,750 kPa) are obtained for the soil–lime mixtures after 180 days of curing. Moreover, two dosage equations that can be used as mix design relationships are obtained to determine the and of the lime-treated soils.
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Acknowledgments
The authors are thankful to Federal University of Technology-Paraná and to the financial support given by CAPES-Brazil, Fundação Araucária do Paraná and CNPq.
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©2018 American Society of Civil Engineers.
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Received: Oct 10, 2017
Accepted: Feb 12, 2018
Published online: May 24, 2018
Published in print: Aug 1, 2018
Discussion open until: Oct 24, 2018
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