The Experts below are selected from a list of 240 Experts worldwide ranked by ideXlab platform

Aro, Matthew D - One of the best experts on this subject based on the ideXlab platform.

  • Natural Resources Research Institute Technical Report
    University of Minnesota Duluth, 2020
    Co-Authors: Aro, Matthew D
    Abstract:

    The University of Minnesota Duluth Natural Resources Research Institute (NRRI) completed a preliminary, screening cradle-to-gate life-cycle assessment (LCA) of St. Louis County, MN bridge 516, which was constructed approximately 7.4 miles W/SW of Babbitt, MN over the Embarrass River. The LCA utilized data from the bill of materials (BOM) and construction drawings, which were provided by Dr. Brian Brashaw of the USDA Forest Service, Forest Products Laboratory (FPL). The system boundary included material and fuel consumption for timber and structural steel materials fabrication; material and fuel consumption for fabrication of steel hardware, Bituminous Overlay, and related components; and transport of materials to the construction site. Because this preliminary screening LCA study was cradle-to-gate, use phase activities and disposal/recycling of the timber bridge were excluded. The majority of the life-cycle inventory data was secondary data from the DATASMART life-cycle inventory (LCI) database. This study also used the cut-off approach method for recycling and utilized the LTS 2019 method to translate the LCI data into environmental impacts; this method combines the ReCiPe Endpoint (H) v1.03 method with three endpoint categories (Human Health, Ecosystems, Resources) and the Cumulative Energy Demand, Climate Change, and Water Use impact categories. It was found that the steel beam supports account for the largest portion of total impacts in each impact category, ranging from 32% to 77%, while the glulam deck panels contribute 24% to 36% of the impacts in four of the six impact categories. The galvanized steel components and asphalt contribute an average of 12% and 7% of the impacts in each impact category, respectively

  • Natural Resources Research Institute Technical Report
    University of Minnesota Duluth, 2020
    Co-Authors: Aro, Matthew D
    Abstract:

    The University of Minnesota Duluth Natural Resources Research Institute (NRRI) completed a preliminary, screening cradle-to-gate life-cycle assessment (LCA) of Hennepin County, MN bridge 27C53, which was constructed on County Road 202 in the Elm Creek Park Reserve. The LCA utilized data from the bill of materials (BOM) and construction drawings, which were provided by Dr. Brian Brashaw of the USDA Forest Service, Forest Products Laboratory (FPL). The system boundary included material and fuel consumption for timber and structural steel materials fabrication; material and fuel consumption for fabrication of steel hardware, Bituminous Overlay, and related components; and transport of materials to the construction site. Because this preliminary screening LCA study was cradle-to-gate, use phase activities and disposal/recycling of the timber bridge were excluded. The majority of the life-cycle inventory data was secondary data from the DATASMART life-cycle inventory (LCI) database. This study also used the cut-off approach method for recycling and utilized the LTS 2019 method to translate the LCI data into environmental impacts; this method combines the ReCiPe Endpoint (H) v1.03 method with three endpoint categories (Human Health, Ecosystems, Resources) and the Cumulative Energy Demand, Climate Change, and Water Use impact categories. It was found that the Bituminous (asphalt) Overlay generally accounted for the largest impact in most impact categories, ranging from 9% to 46%, while the nail-laminated deck panels contributed 18% to 24% of the impacts in five of the six impact categories. The steel hardware, structural steel, and copper naphthenate (CuNap)-treated solid timber components contributed an average of 25%, 8%, and 5% of the impacts in each impact category, respectively

Baright, Matthew D. - One of the best experts on this subject based on the ideXlab platform.

  • Inspection of Concrete Bridge Decks With Asphalt Overlays — a Comparison of Nondestructive Evaluation Methods
    Iowa State University Digital Repository, 1999
    Co-Authors: Dos Reis, Henrique L. M., Baright, Matthew D.
    Abstract:

    Cost effective bridge deck rehabilitation makes it necessary to locate the areas in need of repair to accurately estimate the quantity of deteriorated concrete. Since the Bituminous Overlay prevents visual identification of these areas, nondestructive testing and evaluation techniques are essential [1]. Conventional nondestructive testing techniques, such as sounding by hammer and chain drag, do not fare well on asphalt covered decks, primarily due to the inefficient coupling of energy between the asphalt Overlay and the concrete. They are usually effective only after the asphalt Overlay has been removed [2]. Destructive testing methods such as core samples are effective when a large number of random samples are obtained, which is both costly and unnecessarily damaging to the bridge deck. Recently, nondestructive testing and evaluation techniques, such as impact-echo [3–9], ground penetrating radar [10–17], and infrared thermography [18–23], have shown promise for the noninvasive evaluation of the damage accumulation in concrete bridge decks overlaid with asphalt concrete wearing surfaces. Each nondestructive evaluation method has its own current advantages and limitations which are presented and discussed in this study

David Peshkin - One of the best experts on this subject based on the ideXlab platform.

  • Bituminous Overlay strategies for preventive maintenance on pennsylvania interstate roadways
    Transportation Research Board 89th Annual MeetingTransportation Research Board, 2010
    Co-Authors: Amir Kouba, Shreya Gopal, David Peshkin
    Abstract:

    In 2008 the Pennsylvania Department of Transportation (PennDOT) initiated a two-stage process to identify appropriate Bituminous Overlay strategies for interstate pavements. The first stage consisted of a comprehensive review of the preventive maintenance practices and best practices at a national level and the second stage involved the identification of practices within each district in Pennsylvania. Identification of the most effective practices, both locally and nationally, can be used as a lead-in to the implementation of a strategy for the use of preventive maintenance procedures on interstate and interstate look-alike pavements in Pennsylvania. The process involved an extensive literature review process, outlining the key elements and practices dictating the use of preventive maintenance practices on interstate pavements. The most common techniques observed are thin hot mix asphalt Overlays, micro surfacing, chip sealing, and polymer modified hot mix asphalt Overlay. Various pavement evaluation factors were also identified, including climate, traffic conditions, relevant geography, life cycle costs, and pavement age. Literature review results were supplemented by a survey of practices of selected states and PennDOT districts. These results indicated the best practices with respect to the different performance evaluation criteria such as traffic conditions, pavement evaluation indices, application temperatures, pavement distress, thickness, and service life. The conclusions of the surveys and the literature review were analyzed to generate a list of maintenance techniques which are applicable for conditions in Pennsylvania. In an extension to this study, the identified best practices can be implemented on experimental test sites to validate the findings of this project.

  • summary of Bituminous Overlay strategies for preventive maintenance
    Pavement Preservation Journal, 2010
    Co-Authors: Shreya Gopal, David Peshkin, Amir Koubaa
    Abstract:

    The Pennsylvania Department of Transportation recently initiated a two-stage process to identify treatments that could be used to preserve Bituminous surfaces on interstate highway pavements. This article summarizes this two-stage process. The first stage consisted of a comprehensive literature review of preventive maintenance practices at the national level. The second stage involved the identification of effective preventive maintenance practices by highway agencies in states with conditions similar to Pennsylvania—Michigan, Minnesota, Ohio, New York and Virginia. A district-level survey was also conducted to study the practices and maintenance techniques already used in Pennsylvania. As a result of this study, a list of appropriate Bituminous Overlay strategies was identified. Cape seal was found to extend service life on high traffic volume pavements. Thin bonded wearing courses, microsurfacing and thin hot mix asphalt Overlays also extended service life while improving ride quality.

Matthew D. Baright - One of the best experts on this subject based on the ideXlab platform.

Gopal Shreya - One of the best experts on this subject based on the ideXlab platform.

  • Bituminous Overlay STRATEGIES FOR PREVENTIVE MAINTENANCE ON PENNSYLVANIA INTERSTATE ROADWAYS
    2010
    Co-Authors: Gopal Shreya
    Abstract:

    In 2008, Penn DOT initiated a two-stage process to identify appropriate Bituminous Overlay strategies for interstate pavements. The first stage consisted of a comprehensive review of the preventive maintenance practices and best practices at a national level and the second stage involved the identification of practices within each district in Pennsylvania. Identification of the most effective practices, both locally and nationally, can be used as a lead-in to the implementation of a strategy for the use of preventive maintenance procedures on interstate and interstate look-alike pavements in Pennsylvania. The research approach involved an extensive literature review to identify the preventive maintenance practices, and outline the key elements or factors influencing these practices. The most common techniques observed are thin hot mix asphalt Overlays, microsurfacing, chip sealing, crack seal, and polymer modified hot mix asphalt Overlay. The factors influencing these techniques include climate, traffic conditions, relevant geography, life cycle costs, pavement performance indices, application temperature, service life, pavement distress, and pavement age. The literature review, state survey, and district survey results were used to generate a list of best preventive maintenance practices applicable in Pennsylvania. The identified techniques were also compared to findings from Long Term Pavement Performance data. The study concludes the best practices for preventive maintenance of Pennsylvania interstate pavements. The selected identified best practices can be implemented on experimental test sites to validate the findings of the study