archive-edu.com » EDU » I » IASTATE.EDU

Total: 909

Choose link from "Titles, links and description words view":

Or switch to "Titles and links view".
  • Design Guide for Improved Quality of Roadway Subgrades and Subbases (TR-525)
    ctre iastate edu Copyright 1996 2009 Iowa State University All rights reserved Design Guide for Improved Quality of Roadway Subgrades and Subbases TR 525 Iowa SUDAS which develops specifications and guidance for urban construction Similar related projects Statewide Urban Standard Design Specifications Researcher s Principal investigators Vern Schaefer 515 294 9540 vern iastate edu Co principal investigators Larry Stevens Halil Ceylan 515 294 8051 hceylan iastate edu Iowa State University David White 515 294 1463 djwhite iastate edu Project status Completed Start date 01 01 05 End date 09 30 08 Publications Report Final Report Design Guide for Improved Quality of Roadway Subgrades and Subbases TR 525 2 7 mb pdf September 2008 Tech transfer summary Tech Transfer Summary Design Guide for Subgrades and Subbases 285 kb pdf Sep 2008 Sponsor s partner s Sponsor s Iowa Highway Research Board About the research Abstract The performance of a pavement depends on the quality of its subgrade and subbase layers these foundational layers play a key role in mitigating the effects of climate and the stresses generated by traffic Therefore building a stable subgrade and a properly drained subbase is vital for constructing an effective and long lasting pavement system This

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-984987701 (2015-11-09)
    Open archived version from archive


  • Evaluation of a Bridge Constructed Using Accelerated Construction Practices
    Evaluation of a Bridge Constructed Using Accelerated Construction Practices Similar related projects Laboratory and Field Testing and Evaluation of Precast Bridge Elements Researcher s Principal investigators Terry Wipf 515 294 6979 tjwipf iastate edu Co principal investigators Brent Phares 515 294 5879 bphares iastate edu Iowa State University Wayne Klaiber 515 294 8763 klaiber iastate edu Project status Completed Start date 03 01 06 End date 09 30 08 Publications

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=569646436 (2015-11-09)
    Open archived version from archive

  • Implementation and Evaluation of ITS-Based and Safety Engineering-Based Pedestrian Safety Countermeasures
    Transfer Summaries Research by title Research by principal investigator Research by sponsor Research by keyword Project pages maintained by PI Search research CTRE is an Iowa State University center administered by the Institute for Transportation Address 2711 S Loop Drive Suite 4700 Ames IA 50010 8664 Phone 515 294 8103 FAX 515 294 0467 Website www ctre iastate edu Copyright 1996 2009 Iowa State University All rights reserved Implementation and

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=712698321 (2015-11-09)
    Open archived version from archive

  • Madison County Bridge Evaluation
    294 0467 Website www ctre iastate edu Copyright 1996 2009 Iowa State University All rights reserved Madison County Bridge Evaluation Researcher s Principal investigators Terry Wipf 515 294 6979 tjwipf iastate edu Co principal investigators Charles Jahren 515 294 3829 cjahren iastate edu Brent Phares 515 294 5879 bphares iastate edu Iowa State University Michael LaViolette Project status Completed Start date 03 01 06 End date 09 30 08 Publications

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-767009841 (2015-11-09)
    Open archived version from archive

  • PONTIS, Implementation and Operation: Iowa DOT and Counties, Phase III: Implementation and Operation
    2009 Iowa State University All rights reserved PONTIS Implementation and Operation Iowa DOT and Counties Phase III Implementation and Operation Researcher s Principal investigators Omar Smadi 515 294 7110 smadi iastate edu Iowa State University Co principal investigators F S Fanous 515 294 9416 fanous iastate edu Brent Phares 515 294 5879 bphares iastate edu Iowa State University Student researchers Krishna Kallam Patrick Stein Project status Completed Start date 09 01 02 End date 09 30 08 Publications Report Iowa DOT Bridge Asset Management Using Pontis Data Integration Performance and Decision Support Tools 3 7 mb pdf September 2008 Sponsor s partner s Sponsor s Iowa Department of Transportation Midwest Transportation Consortium About the research Abstract The Iowa DOT currently owns and maintains over 4 000 bridges and culverts on the state highway system With heightened concern for the condition of these aging structures methods for assessing and maintaining the structural performance of in service bridges have become vital to the preservation of Iowa s bridge network An economical data acquisition system that is portable and can be efficiently used on bridge structures could supplement visual inspections with field measured values By pursuing simplicity in the system interface and installation

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=1628906192 (2015-11-09)
    Open archived version from archive

  • Characterization of Unbound Materials (Soils/Aggregates) for Mechanistic-Empirical Pavement Design Guide
    rights reserved Characterization of Unbound Materials Soils Aggregates for Mechanistic Empirical Pavement Design Guide Researcher s Principal investigators Halil Ceylan 515 294 8051 hceylan iastate edu Iowa State University Co principal investigators Kasthurira Gopalakrishnan 515 294 3044 rangan iastate edu Iowa State University Project status Completed Start date 05 01 06 End date 08 31 08 Publications Report Characterization of Unbound Materials Soils Aggregates for Mechanistic Empirical Pavement Design Guide 2 06 mb pdf November 2012 Sponsor s partner s Sponsor s Iowa Department of Transportation About the research Abstract For unbound materials the MEPDG uses the AASHTO soils classification as described in AASHTO M145 or the Unified Soils Classification USC definitions as described in ASTM D 2487 Unbound materials are categorized by grain size distribution liquid limit and plasticity index value The designer selects the primary unbound material type using one of the classification systems and then provides further input to determine appropriate material properties to be used for design While it is expected that resilient modulus testing is to be completed for Level 1 designs many agencies including the Iowa DOT are not equipped to complete resilient modulus testing Therefore for Level 2 designs correlation equations have been

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=1187713389 (2015-11-09)
    Open archived version from archive

  • Evaluation of On-Road and Laboratory Engine Dynamometer Emission Tests to Compare the Emission Reduction Potential of Different Biodiesel Blends
    Reduction Potential of Different Biodiesel Blends Tailpipe probe installed in passenger vehicle Researcher s Principal investigators Shauna Hallmark 515 294 5249 shallmar iastate edu Iowa State University Co principal investigators Song Charng Kong Iowa State University Dennis Kroeger Student researchers Massiel Orellana Abhisek Mudgal Project status Completed Start date 07 10 07 End date 08 31 08 Publications Report Evaluation of On Road and Laboratory Engine Dynamometer Emission Tests to Compare the Emission Reduction Potential of Different Biodiesel Blends 2 6 mb pdf August 2008 Sponsor s partner s Sponsor s CenSARA Blueskyways Collaborative Iowa Department of Natural Resources About the research Abstract Biodiesels are often marketed as being cleaner than regular diesel for emissions Emission test results depend on the biodiesel blend but laboratory tests suggest that biodiesels decrease particulate matter carbon monoxide hydrocarbons and air toxins when compared to regular diesel Results for the amount of oxides of nitrogen NOx have been less conclusive Tests have not evaluated the commonly available ranges of biodiesel blends in the laboratory Additionally little information is available from on road studies so the effectiveness of using biodiesels to reduce actual emissions is unknown A more complex relationship exists between engine operation and the rate of emission production than is typically evaluated using engine or chassis dynamometer tests On road emissions can vary dramatically because emissions are correlated to engine mode Additionally activity such as idling acceleration deceleration and operation against a grade can produce higher emissions than more stable engine operating modes Since these modes are not well captured in a laboratory environment understanding on road relationships is critical in evaluating the emissions reductions that may be possible with biodiesels More tests and quantifications of the effects of different blends on engine and vehicle performance are required to promote widespread use of

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=1207315745 (2015-11-09)
    Open archived version from archive

  • Implementation of HERS-ST in Iowa and Development /Refinement of a National Training Program
    iastate edu Copyright 1996 2009 Iowa State University All rights reserved Implementation of HERS ST in Iowa and Development Refinement of a National Training Program Researcher s Principal investigator Tom Maze Co principal investigators Omar Smadi 515 294 7110 smadi iastate edu Iowa State University Student researcher Neil Burke Project status Completed Start date 07 01 04 End date 08 31 08 Publications Report Implementation of HERS ST in Iowa and Development Refinement of a National Training Program 1 7 mb pdf August 2008 Tech transfer summary Implementing HERS ST in Iowa 109 kb pdf Aug 2008 Sponsor s partner s Sponsor s Iowa Department of Transportation Midwest Transportation Consortium About the research Abstract The Highway Economic Requirements System HERS is an economic model that uses highway performance monitoring system HPMS data to project future highway conditions and requirements HERS is a highly complex model that at the national level uses samples of the highway network taken from the HPMS data As a result at the national level it is only used for aggregate network level analysis planning level analysis When the Federal Highway Administration s Office of Asset Management was established in 1999 the office began developing the state version of HERS or HERS ST HERS ST has since evolved into a model that is specifically crafted for states A DOS version of HERS ST was demonstrated at a workshop attended by representatives of several state transportation agencies in 2001 Since then several improvements have been made to the software including updates for a Windows environment and the addition of GIS capabilities The current project yielded a HERS ST specifically for Iowa but one that can be used as a model for other states The initial goals of this project included customizing the HERS ST software for the Iowa

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-1620211770 (2015-11-09)
    Open archived version from archive