19 March 1999 Using infrared thermography to determine the presence and correct placement of grouted cells in single-width concrete masonry unit (CMU) walls
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Abstract
Determining the placement of reinforcing grout in single-width CMU (Concrete Masonry Unit) walls has, in the past, been a painstaking and destructive undertaking. Usually, a test is performed because -- by accident -- missing cells are discovered when a wall penetration is retrofitted or change order is executed, requiring that the wall be opened. Often, a hammer or hammer drill is used to punch holes where the grouting is supposed to be. The test results are used to extrapolate the extent of the problem. This method falls short, since the sample is so small, that only outright fraud can be found, and excess grouting cannot be determined. This paper discusses the results of a joint effort between Stockton Infrared Thermographic Services, Inc. (SITS) and Allen Applied Infrared Technology, Inc. (AAIT) to produce a methodology for using non-destructive infrared thermography to ensure that the design specifications are being met.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Gregory R. Stockton, Gregory R. Stockton, Lee R. Allen, Lee R. Allen, } "Using infrared thermography to determine the presence and correct placement of grouted cells in single-width concrete masonry unit (CMU) walls", Proc. SPIE 3700, Thermosense XXI, (19 March 1999); doi: 10.1117/12.342318; https://doi.org/10.1117/12.342318
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