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  • Development of a Technology Deployment Plan for the Use of Recycled Concrete Aggregate in Concrete Paving Mixtures
    www ctre iastate edu Copyright 1996 2009 Iowa State University All rights reserved Development of a Technology Deployment Plan for the Use of Recycled Concrete Aggregate in Concrete Paving Mixtures Researcher s Principal investigators Tom Cackler Co principal investigator Robert Rasmussen Transtec Group Project status Completed Start date 09 01 10 End date 06 30 11 Publications Report Development of a Technology Deployment Plan for the Use of Recycled Concrete Aggregate in Concrete Paving Mixtures 721 70 kb pdf June 2011 Sponsor s partner s Sponsor s Federal Highway Administration About the research Abstract The Every Day Counts EDC initiative is a Federal Highway Administration FHWA effort that acknowledges the need for sustainable practices According to the FHWA Administrator the initiative is designed to identify and deploy innovation aimed at shortening project delivery enhancing the safety of our roadways and protecting the environment The use of recycled concrete aggregates RCA in new concrete paving mixtures is an example of innovation that aligns well the goals of the EDC initiative RCA used in new concrete paving mixtures can expedite construction schedules reduce waste and associated hauling cost conserve resources of virgin aggregates and potentially reduce project costs The Technology Deployment Plan

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-735697644 (2015-11-09)
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  • Electronic Construction Collaboration System - Phase III
    iastate edu Copyright 1996 2009 Iowa State University All rights reserved Electronic Construction Collaboration System Phase III Researcher s Principal investigators Charles Jahren 515 294 3829 cjahren iastate edu Student researcher Jose Perez Reboredo Project status Completed Start date 07 01 10 End date 06 30 11 Publications Report Electronic Construction Collaboration System Phase III 4 40 mb pdf December 2011 Sponsor s partner s Sponsor s Iowa Department of Transportation About the research Abstract This phase of the electronic collaboration project involved two major efforts 1 implementation of AEC Sync formerly known as Attolist a web based project management system WPMS on the Broadway Viaduct Bridge Project and the Iowa Falls Arch Bridge Project and 2 development of a web based project management system for bridge and highway construction projects with less than 10 million in contract value During the previous phase of this project fiscal year 2010 the research team helped with the implementation process for AEC Sync and collected feedback from the Broadway Viaduct project team members before the start of the project During the 2011 fiscal year the research team collected the post project surveys from the Broadway Viaduct project members and compared them to the pre project survey results The results of the AEC Sync implementation on the Broadway project were positive The project members were satisfied with the performance of the AEC Sync software and how it facilitated document management and its transparency In addition the research team distributed collected and analyzed the pre project surveys for the Iowa Falls Arch Bridge Project The implementation of AEC Sync for the Iowa Falls Arch Bridge Project appears to also be positive based on the pre project surveys The fourth phase of this electronic collaboration project involves the identification and implementation of a WPMS solution for

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=1229794774 (2015-11-09)
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  • Preservation of Covered Bridges
    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 Preservation of Covered Bridges Researcher s Principal investigators

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-1655307236 (2015-11-09)
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  • Evaluating the Effectiveness of Red Light Running Camera Enforcement in Cedar Rapids and Developing Guidelines for Selection and Use of Red Light Running Countermeasures
    the Effectiveness of Red Light Running Camera Enforcement in Cedar Rapids and Developing Guidelines for Selection and Use of Red Light Running Countermeasures Camera and radio frequency RF antennae setup on mast arm Researcher s Principal investigators Shauna Hallmark 515 294 5249 shallmar iastate edu Iowa State University Co principal investigator Tom McDonald Project status Completed Start date 02 01 10 End date 06 01 11 Publications Report Evaluating the Effectiveness of Red Light Running Camera Enforcement in Cedar Rapids and Developing Guidelines for Selection and Use of Red Light Running Countermeasures 3 32 mb pdf December 2011 Related publications Toolbox of Countermeasures to Reduce Red Light Running off site Apr 2012 Evaluating the Effectiveness of Red Light Running Camera Enforcement in Cedar Rapids and Developing Guidelines for Selection and Use of Red Light Running Countermeasures 859 48 kb pdf Tech transfer summary Dec 2011 Sponsor s partner s Sponsor s Iowa Department of Transportation Midwest Transportation Consortium U S DOT RITA About the research Abstract Red light running RLR is a problem in the US that has resulted in 165 000 injuries and 907 fatalities annually In Iowa RLR related crashes make up 24 5 percent of all crashes and account for 31 7 percent of fatal and major injury crashes at signalized intersections RLR crashes are a safety concern due to the increased likelihood of injury compared to other types of crashes One tool used to combat red light running is automated enforcement in the form of RLR cameras Automated enforcement while effective is often controversial Cedar Rapids Iowa installed RLR and speeding cameras at seven intersections across the city The intersections were chosen based on crash rates and whether cameras could feasibly be placed at the intersection approaches The cameras were placed starting in February 2010 with

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=1284663747 (2015-11-09)
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  • Iowa DOT Roller Integrated Compaction Monitoring Technology Research and Implementation - Phase II
    rights reserved Iowa DOT Roller Integrated Compaction Monitoring Technology Research and Implementation Phase II Researcher s Principal investigators David White 515 294 1463 djwhite iastate edu Co principal investigators Pavana Vennapusa 515 294 2395 pavanv iastate edu Project status Completed Start date 06 01 11 End date 06 01 11 Publications Report Iowa DOT Roller Integrated Compaction Monitoring Technology Research and Implementation Phase II 9 84 mb pdf July 2011 Sponsor s partner s Sponsor s Iowa Department of Transportation About the research Abstract This report presents results and findings of the Phase II Iowa Department of Transportation Roller Integrated Compaction Monitoring RICM Technology Research and Implementation program During this phase of the project special provisions SPs were developed that required RICM technologies on three hot mix asphalt HMA overlay pilot projects in Iowa The field results are presented for each project The bid item cost for implementing the RICM HMA SPs on each project varied from 0 9 to 1 4 of total project cost The SP on US30 Harrison County project required RICM roller coverage including temperature pass count and compaction measurements on one break down roller The SP on US20 Ida County project required RICM roller coverage including temperature and pass count on one break down roller The SP on IA9 Kossuth County project required roller pass count coverage for all compaction equipment The SPs were successfully implemented on US30 and US20 projects and the information from the RICM rollers conveniently met the requirements of the SPs for roller coverage The IA9 project encountered problems with roller data storage export during construction leading to not meeting the coverage requirements of the project SP Testing was conducted on each project by the Iowa State University research team beyond the requirements of the project specifications to analyze asphalt density

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=698664852 (2015-11-09)
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  • Development of LRFD Design Procedures for Bridge Piles in Iowa-Volume II: Field Testing of Steel Piles in Clay, Sand, and Mixed Soils and Analysis
    University All rights reserved Development of LRFD Design Procedures for Bridge Piles in Iowa Volume II Field Testing of Steel Piles in Clay Sand and Mixed Soils and Analysis Field test site and completed static load test frame inset Researcher s Principal investigators Sri Sritharan 515 294 5238 sri iastate edu Iowa State University Project status Completed Start date 01 01 08 End date 05 31 11 Publications Report Development of LRFD Design Procedures for Bridge Piles in Iowa Volume II Field Testing of Steel Piles in Clay Sand and Mixed Soils and Data Analysis 8 02 mb pdf September 2011 Tech transfer summary Development of LRFD Design Procedures for Bridge Piles in Iowa Volume II Field Testing of Steel Piles in Clay Sand and Mixed Soils and Analysis 740 12 kb pdf Sep 2011 Sponsor s partner s Sponsor s Iowa Department of Transportation Iowa Highway Research Board About the research Abstract In response to the mandate on Load and Resistance Factor Design LRFD implementations by the Federal Highway Administration FHWA on all new bridge projects initiated after October 1 2007 the Iowa Highway Research Board IHRB sponsored these research projects to develop regional LRFD recommendations The LRFD development was performed using the Iowa Department of Transportation DOT Pile Load Test database PILOT To increase the data points for LRFD development develop LRFD recommendations for dynamic methods and validate the results of LRFD calibration 10 full scale field tests on the most commonly used steel H piles e g HP 10 x 42 were conducted throughout Iowa Detailed in situ soil investigations were carried out push in pressure cells were installed and laboratory soil tests were performed Pile responses during driving at the end of driving EOD and at re strikes were monitored using the Pile Driving Analyzer PDA

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=2103170478 (2015-11-09)
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  • Stabilization Procedures to Mitigate Edge Rutting for Granular Shoulders, Phase II (TR-591)
    8664 Phone 515 294 8103 FAX 515 294 0467 Website www ctre iastate edu Copyright 1996 2009 Iowa State University All rights reserved Stabilization Procedures to Mitigate Edge Rutting for Granular Shoulders Phase II TR 591 Soft subgrade condition on shoulders Soapstock stabilization 2000x Compaction of fly ash stabilized shoulder Shoulder edge rutting Cement stabilization of shoulders Researcher s Principal investigators Charles Jahren 515 294 3829 cjahren iastate edu Co principal investigators David White 515 294 1463 djwhite iastate edu Student researchers Peter Becker Chase Westercamp Thang Phan Project status Completed Start date 04 01 08 End date 05 31 11 Publications Report Final Report Stabilization Procedures to Mitigate Edge Rutting for Granular Shoulders Phase II 26 93 mb pdf May 2011 Tech transfer summary Tech Transfer Summary Stabilization Procedures to Mitigate Edge Rutting for Granular Shoulders Phase II 3 29 mb pdf May 2011 Sponsor s partner s Sponsor s Iowa Department of Transportation Reilly Construction Co About the research Abstract Edge ruts can quickly develop in certain critical locations causing severe safety problems that require managers to quickly redirect resources away from routine maintenance tasks and compromising efficiency Therefore this issue can disrupt the entire workflow for a

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-576459908 (2015-11-09)
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  • Sensitivity Evaluation of MEPDG Performance Prediction, NCHRP 01-47
    principal investigators Rui Li University of Maryland Kasthurira Gopalakrishnan 515 294 3044 rangan iastate edu Iowa State University Sunghwan Kim sunghwan iastate edu Project status Completed Start date 09 02 09 End date 04 30 11 Publications Report Sensitivity Evaluation of MEPDG Performance Prediction NA pdf December 2011 Sponsor s partner s Sponsor s University of Maryland About the research Abstract The AASHTO interim edition of the Mechanistic Empirical Pavement Design Guide Manual of Practice MEPDG and related software developed under NCHRP provides methodologies for the analysis and performance prediction of different types of flexible and rigid pavements The performance predicted by these methodologies in terms of distresses such as cracking rutting faulting and smoothness for the anticipated climatic and traffic conditions depends on the values of input parameters that characterize pavement materials layers design features and condition However these input parameter values are expected to differ to varying degrees and therefore the predicted performance may also vary to some degree depending on the input parameter values Although studies have been conducted to relate predicted performance to differences in input parameter values these studies have not addressed this relationship in a systematic manner to identify the relative influence of input

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=799290344 (2015-11-09)
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