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A bughole (or pinhole) is a small hole in the surface of a concrete structure caused by the expansion and eventual outgassing of trapped pockets of air in setting concrete. Bugholes are undesirable, as they may compromise the structural integrity of concrete emplacements.
Bughole-induced outgassing is a phenomenon occurring when applying a protective coating (or lining) to concrete (predominantly vertically cast-in-place) where air becomes trapped within bughole cavities and releases into or through the protective coating, thereby causing pinholes and holidays in the coating film.
- Preventing Air-Induced Coating Failures on Concrete (PDF), JPCL, January 2007, archived from the original (PDF) on 2014-10-22, retrieved 2014-10-21
- Solvent-Free sealant creates smooth concrete surface for coating, Bayer Coatings, retrieved 2014-10-21
- Bugholes, Portland Cement Association, retrieved 2014-10-21
- Thin-Patch Repair of Concrete in Wastewater Environments Using Commercially Available Cementitious Resurfacers (PDF), Concrete Repair Bulletin, January 2008, retrieved 2014-10-21[permanent dead link]
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