This investigation was conducted to assess the efficacy of the Clegg impact hammer (CIH) for estimating the strength of compacted soils by conducting a comparative study between the California-bearing ratio (CBR) and CIH tests. The study was carried out in two phases. In phase 1, compacted marl samples were prepared in the laboratory under three different compactive efforts and different molding moisture contents and then subjected to CBR and CIH tests. Phase 2 focused on conducting in situ CBR and CIH tests on existing soils at some preselected locations as part of ongoing projects in Saudi Arabia. The test results of both phases were statistically analyzed and indicated that the Clegg impact value correlates relatively well with the CBR value for both the laboratory and field tests. These correlations were compared with those reported in the literature. A general, reliable, best-fit model has been proposed for the laboratory, field, and literature data.
Clegg Hammer—California-Bearing Ratio Correlations
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Clegg Hammer—California-Bearing Ratio Correlations
Abstract
Authors
Associate Professor, Civil Engineering Dept., King Fahd Univ. of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.
Assistant Professor, Civil Engineering Dept., King Fahd Univ. of Petroleum and Minerals, Dhahran 31261, Saudi Arabia. E-mail: asi@kfupm.edu.sa; presently, Assistant Professor, Hashemite Univ., P.O. Box 960515, Amman 11196, Jordan.
Professor, Civil Engineering Dept., King Fahd Univ. of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.
Research Engineer, Research Institute, King Fahd Univ. of Petroleum and Minerals, Dhahran 31261, Saudi Arabia; presently, Project Engineer, Gulf Engineering House, P.O. Box 27108, Riyadh 11417, Saudi Arabia.
Received: December 13, 2000
Accepted: January 02, 2002
Published online: November 15, 2002
Copyright © 2002 The American Physical Society