ACI Singapore Chapter Presentation – ACI 562-25 Assessment, Repair, and Rehabilitation of Existing Concrete Structures

Presenter: William J. Gold, P.E., Senior Engineer – American Concrete Institute, Hosted by the ACI Singapore Chapter

This presentation introduces ACI 562-25, Assessment, Repair, and Rehabilitation of Existing Concrete Structures—Code Requirements and Commentary. The latest version of the Code includes numerous updates, three new chapters, and a new appendix. An updated companion guide provides expanded information and project examples to assist users in interpreting and applying the provisions.

Topics to be covered include:
• Key changes in the updated Code
• Determining the design-basis code
• Reliability-based assessment and revisions to the detailed assessment equations
• New chapter on fire resistance, assessment, and damage repair
• New chapter on reinforcement details and conditions for structural evaluation and repair design
• New chapter on temporary shoring and bracing
• Construction documents and quality assurance requirements

Learning Objectives:

Recognize the importance of complete construction documentation and quality assurance provisions.

Understand the reorganization and structure of the updated Code.

Recognize that new structural members are governed by the existing building code, while their connections to existing structures follow current code requirements.

Explain the objective of a concrete repair code—to provide a uniform, flexible set of requirements addressing a range of repair scenarios, including conventional reinforced concrete, prestressed concrete, and fiber-reinforced polymer systems.

Describe the effects of fire on reinforced concrete members and methods for determining residual strength.

Determine the development length of historical reinforcement using newly introduced equations.

Describe the various bond conditions at the interface between existing concrete substrates and new concrete overlays or placements.