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Filtering by: Date issued sim 2009-11-20 License All rights reserved

New acoustic emission applications in civil engineering

Creator:

Schumacher, Thomas

Abstract:

Non-destructive testing methods and applications have become of increasing interest due to the worldwide aging and deteriorating infrastructure network. In the field of Civil Engineering, bridges and bridge components as well as non-structural elements such as roadway pavements for example, are affected. In particular, the Acoustic Emission (AE) technique offers...

Resource Type:

Dissertation
Statistical analysis and speciation modeling of copper in Oregon highway runoff

Creator:

Bloomquist, Don J.

Abstract:

Low levels of copper have been shown to impair the olfactory system of threatened and endangered (T&E) salmon, decreasing their predator avoidance behavior and likely increasing mortality. However, only dissolved copper (dissCu) present as the cupric ion (Cu2+) and weakly complexed species are truly bioavailable. Previous studies indicate the vast...

Resource Type:

Masters Thesis
Development of an improved system for Oregon to accurately quantify dense-graded hot mix asphalt pavement density

Creator:

Darra, Suraj

Abstract:

The Oregon Department of Transportation (ODOT) standard specifications require a minimum density for the construction of dense-graded hot mix asphalt (HMA) pavements. Currently, the standard specifications call for density measurements for quality control (QC) and quality assurance (QA) testing to be made using nuclear density gauges that are calibrated using...

Resource Type:

Masters Thesis