Comparison of Various Filter Media Mixtures’ Hydraulic Properties from a Laboratory Testing Program

2017 ◽  
Author(s):  
J. Swanson ◽  
D. A. Saftner ◽  
R. L. Teasley
Keyword(s):  
Laboratory Testing ◽  
Hydraulic Properties ◽  
Filter Media ◽  
Testing Program

Investigation of Bonding Materials for Traffic Monitoring Equipment: Properties of Selected Formulated Materials

1996 ◽  
Vol 1536 (1) ◽  
pp. 25-30
Author(s):  
Agata J. Wiackowska-La Rue ◽  
David W. Fowler ◽  
Eric J. Ueber
Keyword(s):  
Laboratory Testing ◽  
Traffic Monitoring ◽  
Vehicle Classification ◽  
Test Results ◽  
Foreseeable Future ◽  
Monitoring Equipment ◽  
Testing Program ◽  
Accurate Knowledge ◽  
New Construction ◽  
Monitoring Devices

Planning for new construction and rehabilitation requires accurate knowledge of traffic volume, vehicle classification, and axle loads. Monitoring and controlling the movements of cars and other vehicles will grow increasingly important in the foreseeable future. To estimate the number of vehicles, truck weights, and speed, piezoelectric axle detectors placed into pavements are used. In Texas several thousand devices at over 1,000 sites are maintained and regularly monitored online. It is essential that the installation of monitoring devices be fast, easy, usable in all types of pavements, and reliable without requiring maintenance or reinstallation for a reasonable length of time. Bonding materials are needed to install the monitoring devices in the pavement. A study was conducted to select materials that would perform satisfactorily. Several chemically different materials were tested. Descriptions of the laboratory testing program, field installations, test results, and conclusions are presented.

Mechanical Properties of Tank Car Steels Retired From the Fleet

2009 ◽  
Author(s):  
Peter C. McKeighan ◽  
David Y. Jeong ◽  
Joseph W. Cardinal
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Material Characterization ◽  
Laboratory Testing ◽  
Structural Integrity ◽  
Hazardous Materials ◽  
High Rate ◽  
Test Program ◽  
Testing Program ◽  
Toughness Testing

As a consequence of recent accidents involving the release of hazardous materials (hazmat), the structural integrity and crashworthiness of railroad tank cars have come under scrutiny. Particular attention has been given to the older portion of the fleet that was built prior to steel normalization requirements instituted in 1989. This paper describes a laboratory testing program to examine the mechanical properties of steel samples obtained from tank cars that were retired from the fleet. The test program consisted of two parts: (1) material characterization comprised of chemical, tensile and Charpy V-notch (CVN) impact energy and (2) high-rate fracture toughness testing. In total, steel samples from 34 tank cars were received and tested. These 34 tank cars yielded 61 different pre-1989 TC128-B conditions (40 shell and 21 head samples), three tank cars yielded seven different post-1989 TC128-B conditions (four shell and three head samples), and six tank cars yielded other material (A212, A515, and A285 steel) conditions (six shell and five head samples). The vast majority of the TC128-B samples extracted from retired tank cars met current TC128-B material specifications. Elemental composition requirements were satisfied in 97 percent of the population whereas the required tensile properties were satisfied in 82 percent of the population. Interpretation of the high-rate fracture toughness tests required dividing the pre-1989 fleet into quartiles that depended on year of manufacture or age, and testing three tank cars per quartile. Considering the high-rate fracture toughness results at 0°F for the pre-1989 fleet, 100 percent of the oldest two quartiles, 58 percent of the second youngest quartile, and 83 percent of the youngest quartile exhibited adequate or better fracture toughness (defined as toughness greater than 50 ksi√in). High-rate fracture toughness at –50°F was adequate for 83 percent of two quartiles (the youngest and second oldest), but the other two quartiles exhibited lower toughness with only 33 (2nd youngest) to 50 percent (oldest) exhibiting adequate properties.

scholarly journals Industrial solid waste (whitewash mud) use in forest road pavements

2004 ◽  
Vol 28 (4) ◽  
pp. 547-551 ◽  
Author(s):  
Carlos Cardoso Machado ◽  
Reginaldo Sérgio Pereira ◽  
Dario Cardoso de Lima ◽  
Carla Ribeiro Machado e Portugal ◽  
José Maurício Machado Pires ◽  
...  
Keyword(s):  
Solid Waste ◽  
Laboratory Testing ◽  
Dry Weight ◽  
Soil Samples ◽  
Permeability Test ◽  
Testing Program ◽  
Forest Road ◽  
Industrial Solid Waste ◽  
Engineering Parameters ◽  
Transportation Research

The objective of the present study was to evaluate the effects of industrial solid waste (whitewash mud) on geotechnical properties considering the following engineering parameters: California Bearing Ratio (CBR), Atterberg limits and Permeability test. Seven soil samples derived from Alagoinhas, Bahia - Brazil, were classified by the Transportation Research Board (TRB) system. Two were selected as having a great geotecnical potential classified as A-3 (0) and A-2-4 (0), whitewash mud contents 10%, 15%, 20% and 25% dry weight and medium compaction effort were studied in the laboratory testing program. The results indicated the soil denominated good gravel as being the most promising one, when stabilized with whitewash mud, reaching the best results with the dosage of 20 and 25% of whitewash mud.

scholarly journals HYDRAULIC PROPERTIES EFFECT OF FILTER MEDIA ON EMITTER CLOGGING PROBLEMS

2008 ◽  
Vol 25 (3) ◽  
pp. 824-836
Author(s):  
M.N. EL Awady ◽  
A.M. EL Berry ◽  
M.A. I. Genaidy ◽  
A.M. Zayton
Keyword(s):  
Hydraulic Properties ◽  
Filter Media

scholarly journals EVALUASI HASIL UJI PROFISIENSI UNTUK KOMODITI AIR MINUM DALAM KEMASAN

2008 ◽  
Vol 8 (3) ◽  
pp. 111
Author(s):  
Setyodewati Setyodewati ◽  
Untari Pudjiastuti
Keyword(s):  
Drinking Water ◽  
Proficiency Testing ◽  
Laboratory Testing ◽  
The Other ◽  
Z Score ◽  
Testing Program ◽  
Testing Sample ◽  
Testing Laboratories ◽  
Bottled Drinking Water ◽  
Score Analysis

KAN proficiency testing program on the bottled drinking water conducted on 2004 was participated by 46 testing laboratories. Participant laboratories were asked to test the sample for nitrat, nitrit, ammonium, sulphate Cl, Cn, F, F, Fe, Mn, Pb, Cu, Cd, As and Hg contents. Proficiency testing sample were prepared by provider, which also conduct homogeinity test for the Hg and Cu contents of the sample. As the sample was judged to be homogen, they sent to participant laboratory in 2 packs identified as sample KAN A and KAN B. Laboratory testing results were analyzed by statistical method, started on homogeinity of data, Dixon test and Z-score. The evaluation results shows that only sulphate, Cl, F, Fe and Cu contents could be analyzed among the other 14 parameters, which is could not be evaluated because of the in homogeinity of data provided by the laboratories. The inhomogeinity of data was caused by insufficiency of laboratory’s personnel and equipments. The evaluation of proficiency testing results for sulphate, Cl, F, Fe and Cu contents show only 1 satisfactory result among 5 accredited participants, and 9 satisfactory results among 39 non-accredited participants. The conclusion is based on the Z-score analysis of the evaluated parameters.

scholarly journals Static and Dynamic Parameters of Railway Tracks Retrofitted With Under Sleeper Pads

2018 ◽  
Vol 64 (4) ◽  
pp. 187-201
Author(s):  
C. Kraśkiewicz ◽  
A. Zbiciak ◽  
W. Oleksiewicz ◽  
W. Karwowski
Keyword(s):  
Laboratory Testing ◽  
Laboratory Tests ◽  
Sound Level ◽  
Vibration Level ◽  
Dynamic Moduli ◽  
Laboratory Unit ◽  
Testing Program ◽  
University Of Technology ◽  
Elastomeric Materials ◽  
Static And Dynamic Moduli

Abstract The paper presents results of the laboratory tests made for the prototype resilient under sleeper pads in the Warsaw University of Technology laboratory unit. These pads are dedicated to reduce vibrations transmitted to the vicinity of the railroad and to improve the resistance of the railroad structure. The laboratory testing program was carried out for elastomeric materials (polyurethane and rubber based) due to the PN-EN 16730 standard. The obtained values of the key parameters were used in order to determine the insertion loss vibration level by applying analytical method. The paper presents the influence of selected parameters i.e. static and dynamic moduli on the reduction of vibration and structure-borne sound level.

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