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  • Developing Green, Highly Flowable, Rapid Set, High Performance Concrete for Pavement Patch Repair
    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 Developing Green Highly Flowable Rapid Set High Performance Concrete for Pavement Patch Repair Researcher s Principal investigators Kejin Wang 515 294 2152 kejinw iastate edu Iowa State University Co principal investigator Gilson Lomboy Iowa State University Project status In progress Start date 08 01 14 End date 01 31 16 Sponsor s partner s Sponsor s Iowa State University Midwest Transportation Center USDOT OST R About the research Abstract The US has an aging transportation infrastructure that requires constant maintenance and repair The proposed project is to develop green rapid set highly flowable high performance concrete HPC for pavement patch repair In this research fly ash and limestone fines the by products of power plants and aggregate quarries will be beneficially used and HPC will be designed based on the concepts of optimal chemical interaction and particle packing Our initial test result has shown that such new concrete can reach a strength to cost ratio psi cy 94 higher than that of existing ultrahigh strength

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=231283870 (2015-11-09)
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  • Development of a Mix Formation and Pavement Design Using Asphalt-Rubber Binders and Biobased Additives
    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 Development of a Mix Formation and Pavement Design Using Asphalt Rubber Binders and Biobased Additives Researcher s Principal investigators Chris Williams 515 294 4419 rwilliam iastate edu Iowa State University Co principal investigator Joana Peralta Iowa State University Project status In progress Start date 08 01 14 End date 01 31 16 Sponsor s partner s Sponsor s Argo Genesis Chemicals LLC Midwest Transportation Center Seneca Petroleum Company Inc USDOT OST R About the research Abstract The use of asphalt rubber AR in bituminous mixtures is a sustainable technology that leads to a higher rutting and fatigue resistance of flexible pavements but can increase its formulation and design complexity It is therefore essential to study and match the components of these mixtures for optimal performance at appealing economical and environmental costs The focus of this work is the study of AR mixtures containing different additives stabilizers taking into account their

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=99630754 (2015-11-09)
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  • Development of Crash Modification Factors for Lane Departure Countermeasures
    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 Development of Crash Modification Factors for Lane Departure Countermeasures Researcher s Principal investigators Shauna Hallmark 515 294 5249 shallmar iastate edu Iowa State University Project status In progress Start date 08 01 14 End date 07 31 16 Sponsor s partner s Sponsor s Federal Highway Administration State Planning and Research Funding Iowa Department of Transportation Midwest Transportation Center USDOT OST R About the research Abstract Lane departure crashes make up a large percentage of rural crashes for states in the midwest Since agencies have limited resources they rely on studies that demonstrate the effectiveness of a particular countermeasure in order to make decisions about which countermeasures should be selected Most agencies prefer countermeasure effectiveness to be stated in terms of crash modification factors CMFs since they are easily understood and commonly used by agencies Developing data driven performance measures for safety is one of the main MTC themes and robust CMFs have not been developed for a number of lane departure countermeasures The

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=779447058 (2015-11-09)
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  • Development of Rural Road Bridge Weigh-in-Motion System to Assess Weight and Configuration of Farm to Market Vehicles
    and Configuration of Farm to Market Vehicles Researcher s Principal investigators Justin Dahlberg Co principal investigators Brent Phares 515 294 5879 bphares iastate edu Iowa State University Project status In progress Start date 08 01 14 End date 04 30 16 Sponsor s partner s Sponsor s Iowa Department of Transportation Midwest Transportation Center USDOT OST R About the research Abstract The weights and configurations of large vehicles traveling the primary interstate system are known with relative certainty due to the information collected at numerous weigh stations It is uncommon however that farm to market vehicles and other implements of husbandry travel the interstate system thus an accurate assessment of the characteristics of these vehicles is left unknown Since these vehicles commonly travel rural roads and often at weights exceeding the legal limit especially during harvest an accurate understanding of low volume road usage is necessary to properly plan for the near term repair and replacement of structures and roadways even more the information collected will help improve the long term performance and asset management activities A current pooled fund project which the Iowa Department of Transportation DOT is leading looks to assess the impact of implements of husbandry on

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-232107679 (2015-11-09)
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  • Pervious Concrete Physical Characteristics and Effectiveness in Stormwater Pollution Reduction
    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 Pervious Concrete Physical Characteristics and Effectiveness in Stormwater Pollution Reduction Researcher s Principal investigator Say Kee Ong 515 294 3927 skong iastate edu Iowa State University Co principal investigators Kejin Wang 515 294 2152 kejinw iastate edu Iowa State University Project status In progress Start date 08 01 14 End date 12 31 15 Sponsor s partner s Sponsor s Iowa State University Midwest Transportation Center USDOT OST R About the research Abstract Despite being promoted as a sustainable technology the effectiveness of pervious concrete on pollution attenuation has not been fully investigated The proposed study will investigate the contribution of pore void structure characteristics of various pervious concrete mixes on water flow its effectiveness on attenuating water pollution under clean and clogged conditions and the impact of percolated polluted water on subsurface materials Pervious concrete will be made with different cementitious materials and will be characterized for their physical properties such as pore distribution and sizes Using a lab scale system

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-688823950 (2015-11-09)
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  • Using Operational Data to Access Mobility and Crash Experience During Winter Conditions
    ctre iastate edu Copyright 1996 2009 Iowa State University All rights reserved Using Operational Data to Access Mobility and Crash Experience During Winter Conditions Researcher s Principal investigators Zachary Hans 515 294 2329 zhans iastate edu Co principal investigators Neal Hawkins 515 294 7733 hawkins iastate edu Project status In progress Start date 08 01 14 End date 12 31 15 Sponsor s partner s Sponsor s Iowa Department of

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=1928483298 (2015-11-09)
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  • Crash Location Correction for Freeway Interchange Modeling
    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 Crash Location Correction for Freeway Interchange Modeling Researcher s Principal investigator Carlos Sun University of Missouri Columbia

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-798690267 (2015-11-09)
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  • Chip Seal Design and Specifications
    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 Chip Seal Design and Specifications Researcher s Co principal investigators Chris Williams 515 294 4419 rwilliam iastate edu Iowa State University Doug Gransberg 515 294 2140 dgran iastate edu Project status In progress Start date 07 18 14 End date 07 31 16 Sponsor s partner s Sponsor s Oregon Department of Transportation About the research Abstract With the high price of asphalt products and the strong commitment by the Oregon Department of Transportation ODOT to provide sustainable design solutions to the state s construction and maintenance projects chip seals will replace thin asphalt overlays in much of the state s pavement preservation program The result is a more cost effective treatment that minimizes the amount of virgin material required and greatly reduces the carbon footprint of the typical resurfacing job In many cases the chip seal s increased surface macrotexture

    Original URL path: http://www.ctre.iastate.edu/research/detail.cfm?projectID=-1106416879 (2015-11-09)
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