CAL/APT Program: Test Results from Accelerated Pavement Test on Pavement Structure Containing Asphalt Treated Permeable Base (ATPB)–Section 502CT

This report is the third in a series which describe the results of tests and their interpretation on full-scale pavements designed and constructed according to the procedures of the California Department of Transportation (Caltrans) at the Richmond Field Station (RFS) of the University of California at Berkeley (UCB). It describes the results of the Heavy Vehicle Simulator (HVS) test on the third of four pavement test sections, an asphalt-concrete section containing an asphalt treated permeable base (ATPB) designated Section 502CT. The tests on these four test sections have been performed as part of Goal 1 of the Strategic Plan of the Caltrans Accelerated Pavement Testing, or CAL/APT program (1)

HVS Test Results on Fast-Setting Hydraulic Cement Concrete, Palmdale, California Test Sections, South Tangent

As part of the Caltrans Long Life Pavement Rehabilitation Strategies (LLPRS), a fast setting strength hydraulic cement concrete (FSHCC)/Type I/II portland cement concrete (PCC) blend was evaluated under Heavy Vehicle Simulator (HVS) tests as detailed in the Test Plan for CAL / APT Goal LLPRS - Rigid Phase III (1). Because it is expected to be used on projects where heavy trucks are expected to be allowed on the slabs within 4 to 8 hours after placement, this newly placed concrete is specified to obtain a flexural strength of 2.8 MPa within 4 to 8 hours of placement. Two full-scale test sites, each approximately 210 m in length, were constructed using this concrete on either side of State Route 14 about 5 miles south of Palmdale, California. Various test sections were constructed at these two sites. The site in the southbound direction included sections with different thicknesses of concrete placed on compacted granular base. The site in the northbound direction included 200-mm concrete on cement treated base, with various design features: dowels, tied shoulders, and widened lanes. This report documents the results of the tests on the southbound lanes, also referred to as the "South Tangent." Another report currently being written presents the results of tests on the northbound lanes (North Tangent)

PCB uptake and transfer to humans by lake trout

A mathematical model for contaminant uptake from food and water by fishes is combined with a model for yield as a function of fishing mortality in order to examine both the contaminant concentration in fishes and the amount of contaminant transferred to humans from fishes as functions of fishing mortality. The models are fitted to lake trout Salvelinus namaycush data from Lake Michigan, where there has been a persistent problem of PCB contamination. Transfer of contaminants from fishes to humans can be regulated through control of fishing. The concentration of contaminant decreases exponentially as fishing mortality increases because fishing reduces the number of older individuals in the population and concentration is a function of age. The amount of contaminant transferred from a fish population to humans increases to a maximum and then begins to decrease as fishing effort increases. The maximum rate of transfer occurs at a relatively low level of fishing.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/24956/1/0000383.pd

Sami artistry, identity, and indigenism in museums and markets

Thesis (Ph.D.) - Indiana University, Folklore/Ethnomusicology, 200

Review of 'Trekways of the Wind' (Valkeapaa)

Review