Specifications for Repair of Concrete in Buildings-Specifications for Repair of Concrete in Buildings—Brand New, Section 3 Concrete Removal and Preparation of Repair (Recorded Presentation)

Specifications for Repair of Concrete in Buildings—Brand New, Section 3 Concrete Removal and Preparation of Repair (Recorded Presentation)

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Video Summary

Ken Lozen, a consulting engineer and ICRI's technical director, discussed the importance of proper concrete removal and surface preparation to ensure durable repairs. Effective surface preparation is crucial for preventing repair failures, additional costs, and maintaining structural integrity. The newly introduced specifications follow a three-section format: general, products, and execution. This includes specifying surface profiles to minimize microcracking and ensure strong bonding. Recommended guides like ACI 364, ICRI's 310.2R, and others assist in selecting appropriate removal techniques. Quality assurance involves testing, such as pull-off strength, and performing mock-ups. Selecting the correct removal equipment, like hydro demolition or scabbling, and awareness of substrate conditions are emphasized. Execution involves assessing damage, carefully removing concrete around reinforcements, and ensuring a proper concrete surface profile. Essential practices ensure effective concrete repair, contributing to overall structure durability.