D. Nowak, K. Granat, B. Opyd, Wroclaw University of Technology, Department of Foundry Engineering and Automation, Wrocław, Poland In the paper, presented are results of a research on influence of compaction degree on dielectric properties of components of moulding sands. During recent years, intensive research works on possibilities of using microwave heating in foundry technique are carried-ou...

ABSTRACT: This study focuses on investigating the relationship between the bearing capacity of uniform sands and fractal dimensions calculated by different methods. California bearing ratio (CBR) tests are performed on 15 different soils to estimate the bearing capacities. A minimum number of 100 grains for each soil are investigated under a stereomicroscope. Applying the areaperimeter, line di...

Canadian oil sands are unconsolidated sand deposits that are impregnated with heavy, viscous petroleum, normally referred to as bitumen. The total bitumen in place in Alberta is estimated at 1.7 to 2.5 trillion barrels and is clearly massive by world standards. Presently, 25% of the Canadian energy needs are derived from upgraded bitumen from mined oil sands. The oil sands are a complex mixture...

Mediterranean temporary ponds on Doñana’s aeolian sands form an extensive system of small dynamic water bodies, dependent on precipitation and groundwater, of considerable importance for biodiversity conservation. Different areas of the aeolian sands have received different levels of environmental protection since 1969, and this has influenced the degree of conservation and the flooding dynamic...