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The Scientific World Journal
Volume 2014, Article ID 215804, 9 pages
http://dx.doi.org/10.1155/2014/215804
Research Article

Evaluation of Compressive Strength and Stiffness of Grouted Soils by Using Elastic Waves

1School of Civil, Environmental and Architectural Engineering, Korea University, Seoul 136-701, Republic of Korea
2Department of Geotechnical Disaster Prevention Engineering, Daejeon University, Daejeon 300-716, Republic of Korea

Received 17 February 2014; Revised 28 April 2014; Accepted 25 May 2014; Published 12 June 2014

Academic Editor: Dimitrios G. Aggelis

Copyright © 2014 In-Mo Lee et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Cement grouted soils, which consist of particulate soil media and cementation agents, have been widely used for the improvement of the strength and stiffness of weak ground and for the prevention of the leakage of ground water. The strength, elastic modulus, and Poisson’s ratio of grouted soils have been determined by classical destructive methods. However, the performance of grouted soils depends on several parameters such as the distribution of particle size of the particulate soil media, grouting pressure, curing time, curing method, and ground water flow. In this study, elastic wave velocities are used to estimate the strength and elastic modulus, which are generally obtained by classical strength tests. Nondestructive tests by using elastic waves at small strain are conducted before and during classical strength tests at large strain. The test results are compared to identify correlations between the elastic wave velocity measured at small strain and strength and stiffness measured at large strain. The test results show that the strength and stiffness have exponential relationship with elastic wave velocities. This study demonstrates that nondestructive methods by using elastic waves may significantly improve the strength and stiffness evaluation processes of grouted soils.