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S176
Concrete Removal and Repair - Methods and Materials

John Poullain, P.E.

This three-hour online course provides general guidelines for the removal of damaged or deteriorated concrete. Successful and durable concrete repairs depend on careful planning and consist of removal, surface and steel preparation and reconstruction after removal of concrete. The student will become familiar with the methods typically used for concrete removal including blasting, crushing, cutting, impacting, milling and presplitting together with their uses, advantages and limitations. Monitoring techniques to detect damages to the remaining concrete after completing removal work are presented. The damaged area must be properly prepared because If the entire defective concrete and corrosion product of the reinforcing steel is not removed, the repair materials may not bond properly to the existing concrete member and the repair will fail.

The existing condition and cause or causes of damages are considered in the selection of suitable methods and materials for repair. Concrete damages include cracking, surface deterioration, joint damages, erosion, seepage and spalling. Repair methods and materials consist of various grouts, polymer coatings, jacketing, overlays and injections, various types of cement, concrete and admixtures. Also considered are the preparation of concrete surfaces and reinforcement steel preparation and the replacement and addition of reinforcement steel for a successful and durable concrete repair. Concrete repairs often fail because of poor selection of repair materials. Properties of newer repair materials such as the coefficient of thermal expansion and modulus of elasticity often differ from the existing concrete. If the repair material is not physically or chemically compatible with the existing concrete, debonding, cracking or failure may occur. The student will understand the measures required in preparing concrete surfaces and reinforcement steel for sound and durable damage repairs.

This course includes a multiple-choice quiz at the end, which is designed to enhance the understanding of the course materials.


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NY PE & PLS: You must choose courses that are technical in nature or related to matters of laws and ethics contributing to the health and welfare of the public. NY Board does not accept courses related to office management, risk management, leadership, marketing, accounting, financial planning, real estate, and basic CAD. Specific course topics that are on the borderline and are not acceptable by the NY Board have been noted under the course description on our website.

AIA Members: You must take the courses listed under the category "AIA/CES Registered Courses" if you want us to report your Learning Units (LUs) to AIA/CES. If you take courses not registered with AIA/CES, you need to report the earned Learning Units (not qualified for HSW credits) using Self Report Form provided by AIA/CES.

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