Cementitious repair mortars are commonly used to rehabilitate deteriorated wastewater concrete infrastructure prior to the application of high-performance lining systems. These repair mortars occasionally receive a broom finish creating a “profiled” surface prior to the application of a trowel- or spray-applied protective lining system. Other recommendations require that that the cementitious mortars receive a blasted surface to impart a mechanical profile prior to topcoating with a similar lining system. In the following paper the author summarize the results of an investigation to quantitatively assess adhesion of a protective lining when applied to a broom finish surface verses a blasted surface.

Subject
Surface finishing, Concrete repair, Test methods, Bond strength, Protective coatings, Curing, Materials, Concrete surfaces, Mortar, Repair, Tensile strength, Lining, Concrete
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2021
Association for Materials Protection and Performance (AMPP)
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