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Author: Qindan Huang Publisher: ISBN: Category : Bridges Languages : en Pages :
Book Description
As there are a large number of existing aging bridges in need of maintenance, Ohio Department of Transportation is seeking safer, better, and efficient approaches for patch-repair concrete removal on bridge decks. The current practice to remove concrete is by using pneumatic breakers, which presents a danger to operators and damages to the sound concrete and rebar. Building on an extensive literature review, this study evaluates the current method and alternative methods that can address the limitations of the current method. Based on the findings, the recommendation is to use hydrodemolition robot to remove concrete, as it is time-efficient and does not create potential harm to the bridge deck or operator. In addition, hydrodemolition leaves a coarse finish cut to allow for a more effective and long lasting bond with the repair material, which is important for patch repair. Two potential robots are identified as most suitable for bridge deck concrete removal: Conjet Jetframe 101 Nalta and Conjet Robot 327. While the advantages of Conjet Jetframe 101 Nalta are easy transportability and low capital cost, Conjet Robot 327 has a higher productivity rate and has a built in debris barrier that is safer for the crew and on-going traffic. Lastly, based on the cost analysis, for project size larger than 100 SF, Conjet Robot 327 becomes a better option.
Author: Qindan Huang Publisher: ISBN: Category : Bridges Languages : en Pages :
Book Description
As there are a large number of existing aging bridges in need of maintenance, Ohio Department of Transportation is seeking safer, better, and efficient approaches for patch-repair concrete removal on bridge decks. The current practice to remove concrete is by using pneumatic breakers, which presents a danger to operators and damages to the sound concrete and rebar. Building on an extensive literature review, this study evaluates the current method and alternative methods that can address the limitations of the current method. Based on the findings, the recommendation is to use hydrodemolition robot to remove concrete, as it is time-efficient and does not create potential harm to the bridge deck or operator. In addition, hydrodemolition leaves a coarse finish cut to allow for a more effective and long lasting bond with the repair material, which is important for patch repair. Two potential robots are identified as most suitable for bridge deck concrete removal: Conjet Jetframe 101 Nalta and Conjet Robot 327. While the advantages of Conjet Jetframe 101 Nalta are easy transportability and low capital cost, Conjet Robot 327 has a higher productivity rate and has a built in debris barrier that is safer for the crew and on-going traffic. Lastly, based on the cost analysis, for project size larger than 100 SF, Conjet Robot 327 becomes a better option.
Author: J. E. Bruinsma Publisher: ISBN: Category : Bridges Languages : en Pages : 44
Book Description
The primary objective of this project is to identify several common bridge deck maintenance activities that are performed by contract, review the current Arizona Department of Transportation (ADOT) specifications for those maintenance activities, modify the specifications where appropriate to reflect current accepted practice, and serve as a model to guide future efforts at updating specifications. To complete the project, all of ADOT's bridge deck maintenance specifications were reviewed. The following repairs were identified for further evaluation: (1) Temporary repair of expansion joints; (2) Minor collision damage repair of concrete I-beam girders; (3) Hole in deck repair (with and without asphalt overlay); and (4) Bridge railing repair (concrete and aluminum). Bridge preservation specifications from other agencies were then collected and reviewed. This led to the selection of two treatments to develop new draft specifications: (1) Bridge Deck Repair: Full-Depth Patch; and (2) Prestressed Concrete I-Beam: Minor Repair by Patching and Epoxy Resin Base Adhesive Injection. Draft specifications were developed and submitted to ADOT for review and possible implementation, thereby completing the project.
Author: M. J. Ryall Publisher: Springer ISBN: 1489972323 Category : Technology & Engineering Languages : en Pages : 772
Book Description
This volume consists of papers presented at the First International Conference on Bridge Management, held at The University of Surrey, Guildford, UK, from 28-30 March 1990.
Author: G. P. Mallett Publisher: Thomas Telford ISBN: 9780727720078 Category : Technology & Engineering Languages : en Pages : 216
Book Description
Provides a review of the repair, maintenance and protection of concrete bridges. This book summarizes information from conference papers, research and technical reports, and others. It aims to increase the expertise of structural engineers and safeguard the investment. It presents solutions to the problems and pitfalls that engineers encounter.
Author: Qindan Huang
Author: Qindan Huang
Author: Federal Highway Administration, Demonstration Projects Division
Author: 
Author: J. E. Bruinsma
Author: Jimmie Carter
Author: M. J. Ryall
Author: American Association of State Highway and Transportation Officials
Author: David B. Woodham
Author: G. P. Mallett
Author: E. J. O'Connor