Transcription of Electrical Conductivity Testing - GERMANN
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Electrical Conductivity Testing - GERMANN
PCA R&D Serial No. 3002 Electrical Conductivity Testing by Michelle R. Nokken and R. Doug Hooton Reprinted by permission of American concrete International, 2006 All rights reserved 58 OctOber 2006 / concrete international by Michelle r. NOkkeN aNd r. dOug hOOtONa contribution from aci committee 236 Electrical Conductivity Testing a prequalification and quality assurance tool Performance-based durability criteria are becoming more prevalent in specifications for concrete structures. Although several standardized and nonstandardized methods are currently used as index tests, or indicators of potential durability, most require a significant lag time between placing the concrete and obtaining the test results. With the goal of providing the concrete industry with more rapid and easy to use index tests, numerous Electrical methods have been developed. Some of these test methods have been standardized,1,2 and maximum values for these test results are commonly stipulated in perfor-mance specifications.
Concrete international / OctOber 2006 59 the overall or bulk conductivity, obtaining pore solution from cement pastes older than about 6 hours requires
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