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A platform for research: civil engineering, architecture and urbanism
Application of MASW to characterize pavement top layers
Both full depth and composite hot mix asphalt (HMA) pavements can be characterized using the multi-channel surface waves (MASW) procedure. It appears that the MASW approach provides reasonable top layer wave velocity estimates for both composite and full-depth HMA pavements when the high frequency portion of the dispersion curve data is used. Thickness estimates are less reliable overall, although most accurate estimates are generally obtained for full depth (single layer) HMA structures, and least accurate results for pavements at high temperature. Accuracy in the thickness estimates using the MASW procedure depends on the assumed value of Poisson's ratio. For composite pavements at low and medium temperatures the fundamental Lamb wave mode curves (A0 and S0) should be matched to the low frequency region of the MASW phase velocity data and a relatively low Poisson's ratio (0.2- 0.27) assigned. For high temperatures a Poisson's ratio of 0.42 can be assigned and the Lamb wave modes again matched to the low frequency region. For full-depth HMA cases the Lamb wave modes should match all the dispersion curve data; the Poisson's ratio at low and medium temperatures should be approximately 0.32. For high temperatures, Poisson's ratio should be higher than 0.32, perhaps approaching 0.4.
Application of MASW to characterize pavement top layers
Both full depth and composite hot mix asphalt (HMA) pavements can be characterized using the multi-channel surface waves (MASW) procedure. It appears that the MASW approach provides reasonable top layer wave velocity estimates for both composite and full-depth HMA pavements when the high frequency portion of the dispersion curve data is used. Thickness estimates are less reliable overall, although most accurate estimates are generally obtained for full depth (single layer) HMA structures, and least accurate results for pavements at high temperature. Accuracy in the thickness estimates using the MASW procedure depends on the assumed value of Poisson's ratio. For composite pavements at low and medium temperatures the fundamental Lamb wave mode curves (A0 and S0) should be matched to the low frequency region of the MASW phase velocity data and a relatively low Poisson's ratio (0.2- 0.27) assigned. For high temperatures a Poisson's ratio of 0.42 can be assigned and the Lamb wave modes again matched to the low frequency region. For full-depth HMA cases the Lamb wave modes should match all the dispersion curve data; the Poisson's ratio at low and medium temperatures should be approximately 0.32. For high temperatures, Poisson's ratio should be higher than 0.32, perhaps approaching 0.4.
Application of MASW to characterize pavement top layers
Anwendung von Mehrkanal-Oberflächenwellen zur Charakterisierung von Deckschichten
Alzate-Diaz, Sara P. (author) / Popovics, John S. (author)
2009
6 Seiten, 3 Bilder, 4 Tabellen, 5 Quellen
(nicht paginiert)
Conference paper
Storage medium
English
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