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.

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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

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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

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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

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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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REPAIR OF REINFORCED AND PRESTRESSED CONCRETE

delamination of the concrete substrate [19, 26-30]. The required steps for surface preparation are as follows: (1)Removal of all unsound concrete: It is recommended to remove slightly more concrete rather than too little, unless it affects the bond of prestressed strands. If patching

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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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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 exceed 4,000 psi to ensure compliance.

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REPAIR OF DAMAGED PRESTRESSED CONCRETE GIRDER

REPAIR OF DAMAGED PRESTRESSED CONCRETE GIRDER AASHTO Midwest Bridge Preservation Conference, Detroit, MI ... -Girder repair by splicing strands is an attractive option. Wood River Interchange ... Repair Sequence Chip concrete in 90 0cuts. Load alternate span with live load.

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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 Technology, Kelly, Pruitt Eberly Stone Inc.

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CONCRETE DAMAGE REPAIRS OF EXISTING MARINE

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 American Concrete Institute ACI-318.

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CONCRETE BEAM REPAIR

CONCRETE BEAM REPAIR 1. Description. This item shall govern for the repair of delaminated, spalled, and chipped areas of prestressed concrete beams, for the removal of unsound concrete at locations indicated on the plans, or as required by the Engineer, for replacement with materials and for

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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 inside of the spiral cage and vertical reinforcement.

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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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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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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 signs of reinforcement corrosion and concrete delamination.

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CONCRETE BEAM REPAIR

CONCRETE BEAM REPAIR 1. Description. This item shall govern for the repair of delaminated, spalled, and chipped areas of prestressed concrete beams, for the removal of unsound concrete at

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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

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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

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CONCRETE DAMAGE REPAIRS OF EXISTING MARINE

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 American Concrete

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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

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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

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Design of radial reinforcement for prestressed concrete ...

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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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

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Types and Causes of Concrete Deterioration

delamination, and spalling. 4e-4e-4OH- ... Prestressed concrete 0.06 Reinforced concrete exposed to chloride in service 0.15 Reinforced concrete that will be dry or protected from moisture in service 1.00 Other reinforced concrete

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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

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PennDOT LTAP technical

Concrete is a widely used construction material in bridge systems throughout the United States. Typically, concrete bridge systems are designed using reinforced, prestressed concrete, or post-tensioned concrete components. A common form of concrete bridge construction is adjacent noncomposite prestressed concrete

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Bridge Maintenance Manual

Jan 01, 2014  Bridge Maintenance Manual Chapter 1 – Deck Expansion Joints 1-1 June 2016 CHAPTER 1 DECK EXPANSION JOINTS 1.1 TYPES OF JOINTS AND THEIR USES A number of

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Correcting and Preventing Concrete Corrosion

Nov 06, 2019  Repair and Prevention. The traditional concrete repair method is to remove the cracked and spalled concrete to a depth of 20 - 30 mm behind the reinforcing bars to fully expose the rusted material and remove the contaminated concrete

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