repair of delaminated prestressed concrete
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repair of delaminated prestressed concrete.

REPAIR OF DELAMINATED PRESTRESSED CONCRETE

REPAIR OF DELAMINATED PRESTRESSED CONCRETE CYLINDERS USING POST-INSTALLED ANCHORS: PART I – RADIAL TENSION DEMAND AND FEM ANALYSIS Shen Wang1, Javeed A. Munshi 2 1 Ph.D., P.E., Senior Engineer, Bechtel Power Corp., Frederick, MD (corresponding author, [email protected])

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REPAIR OF DELAMINATED PRESTRESSED CONCRETE

REPAIR OF DELAMINATED PRESTRESSED CONCRETE CYLINDERS USING POST-INSTALLED ANCHORS: PART II – CRACK TIGHTNESS REQUIREMENT Shen Wang1, Javeed A. Munshi 2 1 Ph.D., P.E., Senior Engineer, Bechtel Power Corp., Frederick, MD (corresponding author, [email protected])

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Delaminated Prestressed Concrete Dome: Investigation and ...

Delaminated Prestressed Concrete Dome: Investigation and Repair ... An investigation was made as to the causes of the delamination, the strength of the delaminated structure, and repair techniques. Repairs were made consisting of epoxy injection of cracks in the lower 2 ft (51 m) of the dome, providing radial anchors between the lower portion ...

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Repair of prestressed concrete cylinder with localized ...

A design process for post-installed anchors is proposed for repairing a delaminated prestressed concrete cylindrical structure at the end of the paper, supplemented by an illustrative design ...

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Delamination and Topping Slab Repair with Concrete Mender ...

Sep 17, 2009  Concrete Delamination Repair. Roadware 10 Minute Concrete Mender™ is an excellent choice for repairing concrete topping slab delaminations. The very low viscosity of less than 8 cps and the exclusive Microdoweling™ penetration properties of the material allow it to flow deep into delaminated concrete voids.

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Repair of Delaminated Prestressed Concrete Cylinders using ...

For prestressed concrete cylindrical structures such as nuclear containments, tanks and silos, the curvature effect of the tendons introduces radial tensile stresses in the concrete shell which are generally neglected in the design of such structures. These structures are generally reinforced in the circumferential (hoop) and meridional (vertical) directions but not in the radial direction.

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Delaminated Prestressed Concrete Dome: Investigation and ...

Delaminated Prestressed Concrete Dome: Investigation and Repair ... An investigation was made as to the causes of the delamination, the strength of the delaminated structure, and repair techniques. Repairs were made consisting of epoxy injection of cracks in the lower 2 ft (51 m) of the dome, providing radial anchors between the lower portion ...

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Repair of prestressed concrete cylinder with localized ...

A design process for post-installed anchors is proposed for repairing a delaminated prestressed concrete cylindrical structure at the end of the paper, supplemented by an illustrative design ...

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Proposed evaluation and repair procedures for precast ...

Repair of Precast, Prestressed Concrete Bridge Products.7 The objective of the report was to achieve a greater degree of uniformity among owners, engineers, and precast con-crete producers with respect to the evaluation and repair of precast, prestressed concrete bridge beams. The report recognizes end-of-beam cracking in Troubleshooting, Item 4.

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Concrete Repair - National Precast Concrete Association

Jan 08, 2018  The best repair product is one with mechanical properties that closely match the original concrete. Therefore, if the precast product has compressive strength required to exceed 4,000 psi and the actual testing shows strength of 5,000-to-6,000 psi, the repair material needs to

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DURABILITY AND REPAIR ISSUES FOR PRESTRESSED CONCRETE ...

Nov 13, 2017  The use of Prestressed Concrete for construction of bridge, wharf and other civil structures expanded rapidly from the 1960’s onwards, due mainly to the increased spans and economy that it provided. The prestressed elements have also proved to be very durable, due mainly to the high quality of construction including good concrete cover ...

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Concrete Repair Manual (CRM)

The Concrete Repair Manual is referenced in several 2014 Standard Specification Items. This ... Standard Specification References Spec Item Item Title Spec Reference Repair Manual Reference 409 Prestressed Concrete Piling 3.1 (Defects and Breakage) Refer to Section 2.4 for limits and repair ... delaminated, or spalled concrete is defined per ...

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You Can Identify and Repair (Most) Problems

• Evaluation and Repair Procedures for Precast/Prestressed Concrete Girders with Longitudinal Cracking in the Web National Cooperative Highway Research Program, Project 18-14, FY 2006 • Bearing Zone Cracking of Precast Prestressed Girders Due to Sliding Friction Kahn, Georgia Institute of

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CONCRETE DAMAGE REPAIRS OF EXISTING MARINE TERMINALS

0.35) concrete for superstructure. Substitute part of cement with pozzolans. Include in concrete mix water-reducing, corrosion-inhibiting admixtures. Prestressed concrete piles have shown good performance in marine terminals. Consider increasing the minimum concrete cover prescribed in

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Bridge Deck Repair Using Epoxy Resin - Iowa

A more permanent repair of a spalled area can be accomp­ lished by removing all deteriorated concrete as well as all delaminated areas around a spall and patching with low slump, PC Concrete. In 1974, the Kansas State Highway Department published a report on "Repair of Hollow or Softened Areas in Bridge Decks

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Shen Wang - Professor - Shanghai University LinkedIn

Repair of Delaminated Prestressed Concrete Cylinders Using Post-Installed Anchors: Part I-Radial Tension Demand and FEM Analysis Proceedings of 22nd International Conference on Structural Mechanics in Reactor Technology (SMiRT 22) 2013 年 8 月

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Concrete Repair Manual: Standard Specification References ...

Severity of the unsound, delaminated, or spalled concrete is defined per Section 2.1. After defining, select materials and implement repair per Section 3.1 (Minor), 3.2 (Intermediate), or 3.3 (Major). 780. Concrete Crack Repair. 2 (Materials)

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Evaluation and Repair Procedures for Precast/Prestressed ...

Evaluation and Repair Procedures for Precast/Prestressed Concrete Girders with Longitudinal ... by CI staff using the procedure from PCIâ s Manual for the Evaluation and Repair of Precast, Prestressed Concrete Bridge Products (11). ... of crack growth since production and of

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UNITED STATES OF AMERICA NUCLEAR REGULATORY

x Analysis of prestressed concrete railroad ties, MBTA and AMTRAK, New England. x Condition survey of portions of remaining slurry wall, World Trade Center, New York, NY. x Evaluation of delaminated repair overlay, at four piers, Pearl Harbor, Hawaii x Investigation of indoor pool decks, walls, and associated spaces, Acton-Boxboro, Cambridge ...

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Evaluation and Repair Procedures for Precast/Prestressed ...

Evaluation and Repair Procedures for Precast/Prestressed Concrete Girders with Longitudinal ... by CI staff using the procedure from PCIâ s Manual for the Evaluation and Repair of Precast, Prestressed Concrete Bridge Products (11). ... of crack growth since production and of

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Concrete Repair Manual: Standard Specification References ...

Severity of the unsound, delaminated, or spalled concrete is defined per Section 2.1. After defining, select materials and implement repair per Section 3.1 (Minor), 3.2 (Intermediate), or 3.3 (Major). 780. Concrete Crack Repair. 2 (Materials)

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Concrete Repair Manual (CRM)

The Concrete Repair Manual is referenced in several 2014 Standard Specification Items. This ... Standard Specification References Spec Item Item Title Spec Reference Repair Manual Reference 409 Prestressed Concrete Piling 3.1 (Defects and Breakage) Refer to Section 2.4 for limits and repair ... delaminated, or spalled concrete is defined per ...

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UNITED STATES OF AMERICA NUCLEAR REGULATORY

x Analysis of prestressed concrete railroad ties, MBTA and AMTRAK, New England. x Condition survey of portions of remaining slurry wall, World Trade Center, New York, NY. x Evaluation of delaminated repair overlay, at four piers, Pearl Harbor, Hawaii x Investigation of indoor pool decks, walls, and associated spaces, Acton-Boxboro, Cambridge ...

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Case Studies in Structural Repair of Pretensioned Concrete ...

necessary to rectify precast, prestressed concrete products. The cases show types of damage that can be caused by overloading, underdesign, quality control errors, accidents, and unanticipated events. The types of repair methods discussed are epoxying cracks, applying patches, enlarging the member with steel, and adding

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Inspection and Repair of a Fire Damaged Prestressed Girder ...

Additional concrete was easily removed by hammering at the edges of the spalls. The spiral reinforcement and concrete inside the spiral appeared to be hard but sounded like delaminated concrete. Further analysis showed delaminations had formed within the concrete core just

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Strength and Serviceability of Damaged Prestressed Girders

of strand in the tensile zone, loss of concrete in the compression flange, external CFRP reinforcement, and strand splices. A software program, Prestressed Bridge Assessment, Repair, and Strengthening (PreBARS), was developed in this study. The program runs within the Excel spreadsheet and involves V isual Basic and spreadsheet calculations.

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Precast Concrete Repair: Repair requires 2 elements ...

• Repair is the process of treating an imperfection in the concrete so that the product’s service life will not be impacted • Repair requires 2 elements:

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Measuring the Condition of Prestressed Concrete Cylinder Pipe

Prestressed Concrete Cylinder Pipe (PCCP) is a complex composite structure. For the pipe to ... that the coating was not delaminated and the strength of the concrete had not been reduced. Based on the results of a finite element analysis , no delaminations or micro cracking should occur with the low number

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Post-Tension Tendon Repair Replacement

Post-Tension Tendon Repair Replacement. Vector Construction is hard at work advancing the state-of-the-art evaluation, repair and protection of post-tensioned structures. Post-tensioned concrete is a unique structural system that is widely used to construct many types of structures such as

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Preserving a Precast Box Beam Bridge

Wearing Surface (Concrete) 5.1% - Delamination 1.9% - Scaling 0.1% - Both Delamination Scaling 92.9% - Sound Concrete Concentration of delaminationsConcentration of delaminations near deck joint locations

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Forwards draft evaluation of SEP Topic III-7.C re ...

June 24, 1981 Docket No. 50-244 LS05-81«06-080 Mr. John E. Maier Vice President Electric and Steam Production Rochester Gas 8 Electric Corporation 89 East Avenue Rochester, New York 14649.. e-'f JUN 26 8 tg8 Vsgs RUED Dear Hr. Maier: SUBJECT: SYSTEMATIC EVALUATION PROGRAM TOPIC III-7.C,DELAMINATION OF PRESTRESSED CONCRETE CONTAINMENT STRUCTURES-GINNA Enclosed is a copy of our draft

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Concrete Repair Manual: Bridge Deck Repair

Place the repair material onto the prepared surfaces. Consolidate using immersion-type vibrators or other methods acceptable to the Engineer. Distribute the concrete evenly to avoid the need of excessive shoving. Use vertical penetrations of an approved vibrator to adequately consolidate the concrete.

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Delamination Cracking Behavior of Curved Post-Tensioned ...

May 01, 2020  The American Concrete Institute. Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design ...

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