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Design Modulus Values Using Seismic Data Collection
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1999-01-01
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[PDF-5.48 MB]
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Edition:Interim Report: Sept. 1, 1997 -Aug 31, 1998
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Abstract:Seismic methods provide moduli of different layers, which in many instances, may have distinct advantages over other methods used in the state of practice. Especially, seismic moduli are fundamentally correct material properties, which can often be measured equally easily in the laboratory and in the field. In this report a comprehensive literature search that covers different aspects of pavement design with seismic moduli is presented. Based on this study, the use of seismic moduli in a mechanistic pavement design methodology is reasonable and feasible. To implement a fully mechanistic design procedure, or to develop performance-based specifications, seismic moduli may be a better alternative. This statement is substantiated by the fact that the state of stress and strain are much better understood and defined under seismic tests. Adjusting seismic moduli for the state of the stress that the pavement is experiencing under the actual wheel load may be simpler than to understand fully the stress regimes developed during the FWD tests.
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