This report contains guidelines for aesthetic treatment of concrete safety shape barriers. The report will be of particular interest to design and safety practitioners with responsibility for roadside safety improvements.
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Design and Construction Guidelines for Geosynthetic-Reinforced Soil Bridge Abutments with a Flexible Facing
Author: Wu, Jonathan T H | Size: 2.37 MB | Format:PDF | Quality:Original preprint | Publisher: Transportation Research Board | Year: 2006 | pages: 148 | ISBN: 0309098459
This report presents the findings of research undertaken to develop a rational design method and construction guidelines for using geosynthetic-reinforced soil (GRS) systems in bridge abutments. This report will be of immediate interest to professionals responsible for designing and constructing GRS structures.
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Development of LRFD Specifications for Horizontally Curved Steel Girder Bridges
Author: Kulicki, John M | Size: 1.00 MB | Format:PDF | Quality:Original preprint | Publisher: Transportation Research Board | Year: 2006 | pages: 83 | ISBN: 0309098556
This report contains the findings of research performed to develop design specifications for horizontally curved steel girder bridges. The developed specifications have been adopted by the American Association of State Highway and Transportation Officials (AASHTO) and are included in the 2005 Interims to the third edition of the AASHTO "LRFD Bridge Design Specifications." Detailed examples showing the application of the specifications to the design of an I-girder bridge and a box-girder bridge are available from AASHTO. The material in this report will be of immediate interest to bridge designers.
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This report contains a manual for the in-service inspection of fiber reinforced polymer (FRP) bridge decks. Documentation of the research leading to the development of the inspection manual is also included. The material in this report will be of immediate interest to FRP bridge inspectors, designers, and owners.
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Aggregate Tests for Hot-Mix Asphalt Mixtures Used in Pavements
Author: White, Thomas D | Size: 1.91 MB | Format:PDF | Quality:Original preprint | Publisher: Transportation Research Board | Year: 2006 | pages: 46 | ISBN: 0309098602
This report presents recommendations for performance-based procedures to test aggregates for use in pavements utilizing hot-mix asphalt (HMA) mixtures and provides guidance on using these procedures for evaluating and selecting aggregates for use in specific mixture applications. This information will guide materials engineers in selecting the aggregates that should contribute to well performing pavements; this information can also be used in conjunction with performance-related specifications. The content of this report will be of immediate interest to materials engineers, researchers, and others concerned with the construction and performance of HMA pavements.
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Best-Value Procurement Methods for Highway Construction Projects
Author: Scott III, Sidney | Size: 2.54 MB | Format:PDF | Quality:Original preprint | Publisher: Transportation Research Board | Year: 2006 | pages: 214 | ISBN: 0309098580
This report contains tools for use in awarding best-value highway construction contracts. This report will be of immediate interest to professionals involved in the procurement of highway construction contracts. Under a best-value selection process, the low-bid concept can be modified by adding quality issues to the bid evaluation process. A best-value bid award system can provide a means for both public- and private-sector organizations to achieve common objectives and to include quality in the competitive procurement process.
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Manual on Service Life of Corrosion-Damaged Reinforced Concrete Bridge Superstructure Elements
Author: Sohanghpurwala, Ali Akbar | Size: 1.91 MB | Format:PDF | Quality:Original preprint | Publisher: Transportation Research Board | Year: 2006 | pages: 69 | ISBN: 9780309098625
This report is a manual that provides step-by-step procedures for assessing the condition of corrosion-damaged bridge elements. It also includes procedures that can be used to estimate the expected remaining life of reinforced concrete bridge superstructure elements and to determine the effects of maintenance and repair options on their service life. This manual should be of interest to state engineers and others involved in the design, construction, and maintenance of highway bridges.
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Riprap Design Criteria, Recommended Specifications, and Quality Control
Author: Lagasse, P F | Size: 12.24 MB | Format:PDF | Quality:Original preprint | Publisher: Transportation Research Board | Year: 2006 | pages: 125 | ISBN: 9780309098663
This report presents the findings of a study to develop design guidelines, material specifications and test methods, construction specifications, and construction, inspection, and quality control guidelines for riprap at streams and riverbanks, bridge piers and abutments, and bridge scour countermeasures. Recommendations are provided on a design equation or design approach for each application. Filter requirements, material and testing specifications, construction and installation guidelines, and inspection and quality control procedures are also recommended for each riprap application. To guide the practitioner in developing appropriate designs for riprap armoring systems for these applications, the findings and recommendations are combined to provide design guideline appendixes for (1) Design and Specification of Rock Riprap Installations and (2) Construction, Inspection, and Maintenance of Rock Riprap Installations. This report will be particularly useful to bridge, hydraulic, and highway engineers, as well as bridge maintenance and inspection personnel responsible for design, construction, inspection, and maintenance of bridges and other highway structures.
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Author: Christensen Jr, Donald W | Size: 1.28 MB | Format:PDF | Quality:Original preprint | Publisher: Transportation Research Board | Year: 2006 | pages: 54 | ISBN: 9780309098670
This report presents the findings of two coordinated research projects that investigated whether changes to the recommended Superpave mix design criteria for voids in mineral aggregate, voids filled with asphalt, and air voids content might further enhance the performance and durability of hot mix asphalt. Its main finding is that, based on an evaluation of the performance properties of hot mix asphalt, major revisions to these volumetric criteria are not needed, although some refinements are possible. The report will be of particular interest to materials engineers in state highway agencies, as well as to materials suppliers and paving contractor personnel responsible for the specification and production of hot mix asphalt.
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This report presents guidance for the selection of best management practices (BMPs) for highway runoff control. These practices provide means of avoiding or mitigating the negative impacts of various pollutants that can be carried by rainfall into the groundwater and receiving waters. These pollutants include materials discharged by vehicles using the highway system, pesticides and fertilizers from adjacent landscapes, and particulates from breakdown of the pavements themselves. BMPs include the traditional treatments applied at or near the sources of the pollutants and a more distributed approach known as low-impact development (LID). This report should be a valuable resource for all highway agencies that must evaluate and select the most effective and efficient means of managing pollution related to stormwater from highways.
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