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  • Investigation of Deterioration of Joints in Concrete Pavements
    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 Investigation of Deterioration of Joints in Concrete Pavements Researcher s Principal investigators Peter Taylor 515 294 9333 ptaylor iastate edu Project status Completed Start date 09 16 10 End date 07 25 12 Publications Report Investigation of Deterioration of Joints in Concrete Pavements 1 76 mb pdf October 2012 Related publications Preservation and Rehabilitation of Urban Cocrete Pavements Using Thin Concrete Overlays off site Sep 2014 Guide for Optimum Joint Performance of Concrete Pavements off site Nov 2012 Sponsor s partner s Sponsor s Federal Highway Administration Transportation Pooled Fund TPF 5 224 About the research Abstract Premature deterioration of concrete at the joints in concrete pavements and parking lots has been reported across the northern states The distress is first observed as shadowing when microcracking near the joints traps water later exhibiting as significant loss of material Not all roadways are distressed but the problem is common enough to warrant attention The aim of the work being conducted under this and

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=1652637191 (2015-11-09)
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  • Technology Demonstrations Project: Environmental Impact Benefits with "TX Active" Concrete Pavement in Missouri DOT Two-Lift Highway Construction Demonstration
    s Principal investigators Tom Cackler Co principal investigators James E Alleman 515 294 3892 jea iastate edu John T Kevern University of Missouri Kansas City Project status Completed Start date 09 04 09 End date 07 25 12 Publications Report Technology Demonstrations Project Environmental Impact Benefits with 4 77 mb pdf October 2012 Sponsor s partner s Sponsor s Federal Highway Administration About the research Abstract This research effort evaluated the environmental impacts and benefits obtained from concrete paving materials blended with photo chemically active titanium dioxide TiO 2 The project was completed in combination with a full scale Missouri Department of Transportation MoDOT two lift paving demonstration project in the St Louis Missouri urban area Two innovative photo catalytic concrete paving materials have been studied during this project including a a photocatalytic concrete mainline pavement and b a photocatalytic pervious concrete shoulder pavement The mainline pavement material was applied using a two lift paving strategy where the lower base level layer was constructed with less expensive materials e g a low cementitious content base lift and the thinner top wearing course was then overlaid immediately with concrete containing photocatalytically active cement The included photocatalytic concrete paving material is marketed

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=1819017600 (2015-11-09)
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  • Development of a Database for Drilled SHAft Foundation Testing (DSHAFT)
    Student researcher JESSICA GARDER Project status Completed Start date 02 01 10 End date 06 30 12 Publications Report Development of a Database for Drilled SHAft Foundation Testing DSHAFT 1 96 mb pdf June 2012 Tech transfer summary Development of a Database for Drilled SHAft Foundation Testing DSHAFT 574 46 kb pdf Jun 2012 Sponsor s partner s Sponsor s Federal Highway Administration Iowa Department of Transportation About the research Abstract Drilled shafts have been used in the US for more than 100 years in bridges and buildings as a deep foundation alternative For many of these applications the drilled shafts were designed using the Working Stress Design WSD approach Even though WSD has been used successfully in the past a move toward Load Resistance Factor Design LRFD for foundation applications began when the Federal Highway Administration FHWA issued a policy memorandum on June 28 2000 The policy memorandum requires all new bridges initiated after October 1 2007 to be designed according to the LRFD approach This ensures compatibility between the superstructure and substructure designs and provides a means of consistently incorporating sources of uncertainty into each load and resistance component Regionally calibrated LRFD resistance factors are permitted by the American Association of State Highway and Transportation Officials AASHTO to improve the economy and competitiveness of drilled shafts To achieve this goal a database for Drilled SHAft Foundation Testing DSHAFT has been developed DSHAFT is aimed at assimilating high quality drilled shaft test data from Iowa and the surrounding regions and identifying the need for further tests in suitable soil profiles This report introduces DSHAFT and demonstrates its features and capabilities such as an easy to use storage and sharing tool for providing access to key information e g soil classification details and cross hole sonic logging reports DSHAFT embodies

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=1425934726 (2015-11-09)
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  • Visualization Resources for Iowa State University and the Iowa DOT: An Automated Design Model to Simulator Converter
    515 294 0467 Website www ctre iastate edu Copyright 1996 2009 Iowa State University All rights reserved Visualization Resources for Iowa State University and the Iowa DOT An Automated Design Model to Simulator Converter Driver simulation setup inside the CTRE trailer Researcher s Principal investigators Omar Smadi 515 294 7110 smadi iastate edu Iowa State University Project status Completed Start date 07 01 10 End date 06 30 12 Publications Report Visualization Resources for Iowa State University and the Iowa DOT An Automated Design Model to Simulator Converter 1 64 mb pdf December 2012 Tech transfer summary Visualization Resources for Iowa State University and the Iowa DOT An Automated Design Model to Simulator Converter 591 66 kb pdf Dec 2012 Sponsor s partner s Sponsor s Federal Highway Administration State Planning and Research Funding Iowa Department of Transportation About the research Abstract This project developed an automatic conversion software tool that takes input a from an Iowa Department of Transportation DOT MicroStation three dimensional 3D design file and converts it into a form that can be used by the University of Iowa s National Advanced Driving Simulator NADS MiniSim Once imported into the simulator the new roadway has the identical

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-591376178 (2015-11-09)
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  • Concrete Overlay Field Application Program
    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 Concrete Overlay Field Application Program Concrete Overlay Construction Researcher s Principal investigators Paul Wiegand 515 294 7082 pwiegand iastate edu Tom Cackler Co principal investigators James K Cable Cable Concrete Consultation Project status Completed Start date 04 07 08 End date 05 31 12 Publications Reports Concrete Overlay Field Application Program Final Report Volume I 5 02 mb pdf July 2012 Iowa Task Report US 18 Concrete Overlay Construction Under Traffic 4 86 mb pdf May 2012 Sponsor s partner s Sponsor s Federal Highway Administration Concrete Overlay Field Application Program DTFH 61 06 H 00011 W13 Iowa Department of Transportation Iowa Highway Research Board About the research Abstract The National Concrete Pavement Technology Center Iowa Department of Transportation and Federal Highway Administration set out to demonstrate and document the design and construction of portland cement concrete PCC overlays on two lane roadways while maintaining two way traffic An 18 82 mile project was selected for 2011 construction in northeast Iowa on US 18 between Fredericksburg and

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=1523062566 (2015-11-09)
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  • Development of LRFD Procedures for Bridge Piles in Iowa - Volume IV: Design Guide and Track Examples
    State University All rights reserved Development of LRFD Procedures for Bridge Piles in Iowa Volume IV Design Guide and Track Examples Researcher s Principal investigators Sri Sritharan 515 294 5238 sri iastate edu Iowa State University Project status Completed Start date 07 01 07 End date 05 31 12 Publications Report Development of LRFD Procedures for Bridge Piles in Iowa Volume IV Design Guide and Track Examples 3 83 mb pdf May 2012 Tech transfer summary Development of LRFD Procedures for Bridge Piles in Iowa Volume IV Design Guide and Track Examples 509 19 kb pdf May 2012 Sponsor s partner s Sponsor s Iowa Department of Transportation Iowa Highway Research Board About the research Abstract With the goal of producing engineered foundation designs with consistent levels of reliability as well as fulfilling the Federal Highway Administration FHWA mandatethat all new bridges initiated after October 1 2007 be designed according to the Load and Resistance Factor Design LRFD approach the Iowa Highway Research Board IHRB sponsored three research projects on driven piles TR 573 583 and 584 The research outcomes are presented in three reports entitled Development of LRFD Design Procedures for Bridge Piles in Iowa Volumes I II and III and other research information is available on the project web site at http srg cce iastate edu lrfd Upon incorporating the regional LRFD recommendations from the completed research into the Iowa DOT Bridge Design Manual 2010 as it is being rewritten under the new title of LRFD Bridge Design Manual December 2011 and adopting the American Association of State Highway and Transportation Officials AASHTO LRFD Bridge Design Specifications 2010 this Volume IV for driven piles in Iowa was developed Following the layout of a design guide the application of the LRFD approach is demonstrated using various pile design examples

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-700958271 (2015-11-09)
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  • Evaluation of Various Methods for Deflecting Debris from Bridge Piers
    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 Evaluation of Various Methods for Deflecting Debris from Bridge Piers Debris accumulation at a bridge pier on the Skunk River in Ames Iowa Researcher s Principal investigators Terry Wipf 515 294 6979 tjwipf iastate edu Brent Phares 515 294 5879 bphares iastate edu Iowa State University Project status Completed Start date 03 01 11 End date 05 31 12 Publications Report Debris Mitigation Methods for Bridge Piers 2 20 mb pdf June 2012 Tech transfer summary Debris Mitigation Methods for Bridge Piers 718 74 kb pdf Jun 2012 Sponsor s partner s Sponsor s Federal Highway Administration Iowa Department of Transportation About the research Abstract Debris accumulation on bridge piers is an on going national problem that can obstruct the waterway openings at bridges and result in significant erosion of stream banks and scour at abutments and piers In some cases the accumulation of debris can adversely affect the operation of the waterway

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=1340034535 (2015-11-09)
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  • Study of the Factors that Contribute to Motorcycle Conspicuity - Phase II
    University All rights reserved Study of the Factors that Contribute to Motorcycle Conspicuity Phase II One of the six oncoming rider and headlight combinations presented Researcher s Principal investigator Dawn Marshall University of Iowa Co principal investigators Konstantina Gkritza Project status Completed Start date 01 01 11 End date 05 31 12 Publications Report Motorcycle Conspicuity What Factors Have the Greatest Impact 3 24 mb pdf June 2012 Tech transfer summary Motorcycle Conspicuity What Factors Have the Greatest Impact 514 87 kb pdf Jun 2012 Sponsor s partner s Sponsor s Iowa Department of Transportation Midwest Transportation Consortium U S DOT RITA About the research Abstract The objective of this project was to determine the effect of headlight configuration daytime running lights high beam modulating and rider color bright yellow blue denim and black torso and helmet on the conspicuity of a motorcycle to a driver of a passenger vehicle in a simulated environment To achieve this 36 participants completed three drives on a National Advanced Driving Simulator NADS 2 driving simulator During two of the drives participants were presented with six oncoming motorcycles and three leading parked motorcycles each with a different combination of rider color and headlight configuration Each of the nine motorcycles was present in either the urban or rural driving environment Participants indicated when each motorcycle was first visible to them by pressing a button on the steering wheel of the driving simulator The detection distances from the motorcycles to the participant vehicles were then recorded Participants were within one of two groups younger drivers 25 to 55 or older drivers 65 and older This research applied repeated measures analysis of variance to investigate the impact of headlight configurations and rider color on motorcycle conspicuity in urban and rural environments The researchers found that oncoming motorcycles

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-2112042761 (2015-11-09)
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