Abstract
In irrigation works in general, concrete face rock fill and concrete roofslabs layer dams in particular, after extended use, "air escape" appears. These "air escape" (hollow layer), if not found and dealt with in time, will greatly affect the upper layer of the dam, causing soakage and leakageand shortening the life span of structures. The paper introduces several new results obtainedwhen Infrared Heat method is applied to assess the ability to detect "air escape" under concrete roof slabs on the dyke and damby studying models (convenient time to identify "air escape"; Minimum temperature gap to identify "air escape"; Minimum size of "air escape" identifiable using Infrared Heat method.
 Keywords
 Concrete roof slabs, irrigation work, "air escape", Infrared Heat method
 References
 [1] Floyd F.Sabin,Remote Sensing: Principles and Applications, Third Edition, 2007, Waveland Press, Inc.[2] Tiêu chuẩn Việt nam TCVN 8419:2010 về công trình thủy lợi - thiết kế công trình bảo vệ bờ sông để chống lũ.[3] User’s manual FLIR Ex series, Copyright 2017, FLIR Systems, Inc. All rights reserved worldwide.[4] User’s manual FLIR T4xx series, Copyright 2014, FLIR Systems, Inc. All rights reserved worldwide
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