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  • Evaluation and Testing of a Lightweight Fine Aggregate Concrete Bridge Deck in Buchanan County, Iowa
    Hosteng 515 294 7197 kickhos iastate edu Brent Phares 515 294 5879 bphares iastate edu Iowa State University Project status In progress Start date 07 01 12 End date 06 30 16 Sponsor s partner s Sponsor s Federal Highway Administration State Planning and Research Funding Iowa Department of Transportation Iowa Highway Research Board Partner s Iowa Department of Transportation and Buchanan County Engineering About the research Abstract Recent research has indicated that there are several benefits to using light weight aggregate LWA in concrete mixtures for use in concrete bridge decks The LWA particles act as reservoirs that provide curing water to the hydrating mixture from within the system This is particularly beneficial in low water to cement w cm ratio concrete mix designs in which it is likely that there will be insufficient water to hydrate all of the cement at the time of mixing This improves the properties of the concrete and reduces the risk of cracking To ensure that these concrete material alternatives offer the greatest benefit to bridge owners both in Iowa and nationwide this research consists of field testing and evaluating a demonstration bridge designed to utilize a LWA concrete mixture in the concrete

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=420075554 (2015-11-09)
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  • Evaluation of Thermal Integrity Profiling for Deep Foundations
    Project status In progress Start date 07 01 12 End date 09 30 14 Sponsor s partner s Sponsor s Mid America Transportation Center U S DOT RITA Partner s Iowa DOT About the research Abstract Assessing the structural integrity of bridge foundations is critical to ensuring the safety of the traveling public However nondestructive methods currently used in practice to determine the quality of drilled shaft foundations are severely limited by their inability to provide full coverage of the foundation cross section particularly in the critically important region outside of the rebar cage The goal of this project is to evaluate the accuracy of a new thermal integrity profiling TIP technique for quality assurance of deep foundations The TIP method utilizes infrared thermal probes lowered into access pipes which are cast into the foundation to measure the heat of hydration of curing concrete Previous studies demonstrated that the technique can detect loss of concrete cover outside the rebar cage as well as internal flaws such as cracking or voids However the studies did not assess the accuracy of the technique for indicating the specific location and extent of flaws This research project is a collaborative effort between the Institute

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-31999142 (2015-11-09)
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  • Development of a Smart Timber Bridge-Phase V: Development of a Vehicle Characterization
    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 Development of a Smart Timber Bridge Phase V Development of a Vehicle Characterization Researcher s Principal investigators Brent Phares 515 294 5879 bphares iastate edu Iowa State University Simon Laflamme Project status In progress Start date 06 27 12 End date 08 31 15

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=1542548213 (2015-11-09)
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  • Evaluation of Pavement Markings on Challenging Surfaces
    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 Pavement Markings on Challenging Surfaces Researcher s Principal investigators Neal Hawkins 515 294 7733 hawkins iastate edu Project status In progress Start date 06 13 12 End date 10 31 15 Sponsor

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-1781603927 (2015-11-09)
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  • Evaluating All-Weather Pavement Markings & Lab Methods to Simulate Field Exposure
    Phone 515 294 8103 FAX 515 294 0467 Website www ctre iastate edu Copyright 1996 2009 Iowa State University All rights reserved Evaluating All Weather Pavement Markings Lab Methods to Simulate Field Exposure Researcher s Principal investigators Neal Hawkins 515 294 7733 hawkins iastate edu Co principal investigators Omar Smadi 515 294 7110 smadi iastate edu Iowa State University Project status In progress Start date 04 01 12 End date

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-1860742835 (2015-11-09)
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  • Evaluation of the Bridge on Victor Avenue over Prairie Creek (Buchanan County IBRD Bridge Project)
    FAX 515 294 0467 Website www ctre iastate edu Copyright 1996 2009 Iowa State University All rights reserved Evaluation of the Bridge on Victor Avenue over Prairie Creek Buchanan County IBRD Bridge Project Researcher s Principal investigators Brent Phares 515 294 5879 bphares iastate edu Iowa State University Co principal investigators Peter Taylor 515 294 9333 ptaylor iastate edu Pavana Vennapusa 515 294 2395 pavanv iastate edu Project status In progress Start date 01 15 12 End date 12 31 16 Sponsor s partner s Sponsor s Iowa Department of Transportation About the research Abstract Buchanan County will be constructing with the assistance of the Iowa Department of Transportation DOT and the Bridge Engineering Center BEC National Concrete Pavement Technology CP Tech Center and Center for Earthworks Engineering Research CEER at Iowa State University a bridge with several innovative concepts Although the design concept is not complete it will likely include the use of cast on site slabs that are slid launched into place geosynthetic reinforced soil GRS abutments with sheet piling and high performance concrete with internal curing Prior funding for the design construction which included materials and monitoring evaluation of this project has been obtained through the Innovative

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=1188474980 (2015-11-09)
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  • Sequential Dynamic Curve Warning System (Traffic and Parking Control Company (TAPCO))
    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 Sequential Dynamic Curve Warning System Traffic and Parking Control Company TAPCO Researcher s Principal investigators Omar Smadi 515 294 7110 smadi iastate edu Iowa State University Neal Hawkins 515 294 7733 hawkins iastate edu Co principal investigators Shauna Hallmark 515 294 5249 shallmar iastate edu Iowa State University Skylar Knickerbocker 515 294 2238 sknick iastate edu Project status In progress Start date 12 01 11 End date 12 31 13 Publications Report Sequential Dynamic Curve Warning System Traffic and Parking Control Company TAPCO 6 50 mb pdf October 2013 Sponsor s partner s Sponsor s FHWA Highways for LIFE HfL About the research Abstract Horizontal Curves make up a small percentage of total road miles yet account for one quarter of all highway fatalities The majority of crashes on curves involve lane departures The Sequential Dynamic Curve Warning System consists of a series of solar powered LED enhanced BlinkerSigns a Curve Warning BlinkerSign and an array of Chevron BlinkerSigns that

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=565344024 (2015-11-09)
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  • Technology Transfer, Delivery, and Implementation of Best Practices for Jointed Concrete Pavements
    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 Technology Transfer Delivery and Implementation of Best Practices for Jointed Concrete Pavements Researcher s Principal investigators Peter Taylor 515 294 9333 ptaylor iastate edu Project status In progress Start date 09 03 11 End date 09 02 17 Publications Related publications Best Practices for Jointed Concrete Pavements Blended Aggregates for Concrete Mixture Optimization off site Jul 2015 Best Practices for Jointed Concrete Pavements Materials Related Distress Hardened Cement Paste Tech Brief off site Jul 2015 Best Practices for Jointed Concrete Pavements Materials Related Distress Aggregates Tech Brief off site May 2015 Sponsor s partner s Sponsor s Federal Highway Administration About the research Abstract A continuing challenge to the concrete paving industry is the ever present need to implement new technologies as they are proven coupled with the need to educate new employees throughout the industry about best practices The object of this

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-1063331231 (2015-11-09)
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