Abstract: This study was undertaken to identify test procedures capable of reliably assessing concrete aggregate freeze-thaw durability and establish appropriate acceptance criteria for the same. Highway condition surveys were ...

Abstract: Pavement temperature profile data can be quite useful in the analysis of stresses in jointed concrete pavements produced by temperature gradients within the slabs. Many stress analysis procedures consider the temperature ...

Abstract: This report describes the theory and operation of a pulsed-probe anemometer designed to measure steady three-dimensional velocity fields typical of pulmonary tracheo-bronchial airflows. Local ...

Abstract: This study investigated the use and suitability of the International Roughness Index (IRI) for predicting vertical acceleration in truck shipments at recommended highway speeds. The investigation resulted in the development ...

Abstract: A component dowel-bar model has been developed to simulate the doweled joint in portland-cement-concrete (PCC) pavements. The model consists of two bending beams of finite length, embedded in concrete, connected by a ...

Abstract: This paper reports new findings in the spectral analysis of pavement roughness. Elevation profiles of federal and interstate highways were measured with a profilometer, and spectral analysis was used to compute power ...

Abstract: The flow energy loss (head loss) through a cast of canine central airways is found to be nearly independent of flow direction. By contrast, head loss in geometrically-simpler branching sections ...

Abstract: A substantial opportunity exists to reduce carbon dioxide (CO2) emissions, as well as dependence on foreign oil, by developing strategies to cleanly and efficiently use biodiesel, a renewable ...

Abstract: This study presents an investigation into relationships among topographic elevation, surface land cover, and tornado intensity using rapid scan, mobile Doppler radar observations of four tornadoes from the U.S. Central ...