Response of Uncracked Drywall Joints and Panels to Blast Vibration and WeatherPublic Deposited
Cracking is one of the most common concerns cited by owners of structures adjacent to construction or mining blasting. While a large database of case studies documenting the relative insignificance of ground motion induced by responsible blasting compared to weather effects on cracks in nearby structures has been established, the perception of damage to structures, particularly residences, remains common. In allegations of blast damage, litigants may downplay the utility of the database of crack response to weather and ground motion, citing that the behavior of the structure is somehow drastically altered by the existence of cosmetic cracks. In response, this study will compare the response of cracked and uncracked areas of gypsum board in two structures – one near a surface coal mine in Indiana, the other near a limestone quarry in Florida – to blast-induced ground motion and air over-pressure as well as changes in temperature and humidity.
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