994 resultados para Concrete pavements


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A number of spectral analysis of surface wave tests were performed on asphaltic and cement concrete pavements by dropping freely a 6.5kg spherical mass, having a radius of 5.82cm, from a height (h) of 0.51.5m. The maximum wavelength ((max)), up to which the shear wave velocity profile can be detected with the usage of surface wave measurements, increases continuously with an increase in h. As compared to the asphaltic pavement, the values of (max) and (min) become greater for the chosen cement concrete pavement, where (min) refers to the minimum wavelength. With h=0.5m, a good assessment of the top layers of both the present chosen asphaltic and the cement concrete pavements, including soil subgrade, can be made. For a given h, as compared to the selected asphaltic pavement, the first receiver in case of the chosen cement concrete pavement needs to be placed at a greater distance from the source. Inverse analysis has also been performed to characterise the shear wave velocity profile of different layers of the pavements.

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Texas Department of Transportation, Austin

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Federal Highway Administration, Office of Research, Development, and Technology, Washington, D.C.

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Cover title.

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"HRDI-11/10-05(2M)E"--P. [4] of cover.

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"March 1997."

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"June 1998."

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"June 1998."

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"February 2005."

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"February 2005."

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"ERDC-CMB 05-021.".