Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6707744 | Composite Structures | 2014 | 7 Pages |
Abstract
In the context of increased use of carbon fibre reinforced polymer (CFRP) to strengthen concrete structures, the bonding conditions between CFRP and existing structures are crucial. Recently, infrared thermography (IR) non-destructive testing (NDT) has emerged as a technique for bond detection. This paper reports in detail the detection of different unbond, debonding and delamination areas within the bond zone between single- and multi-layer CFRP and concrete structures. Pulse thermography (PTT) was chosen for the IR tests. Pulse intervals of 1Â s, 3Â s, and 5Â s were used as thermal loading to all specimens and halogen lamps were positioned at different distances from the investigated surfaces. Each IR test involved the analysis of 600 IR images. Thermal responses were recorded to detect and study defect characterizations. The paper recommends the minimum thermal input to generate well-recognized bond defect detection, and the results show that the maximum thermal signal is proportional to the number of CFRP layers.
Related Topics
Physical Sciences and Engineering
Engineering
Civil and Structural Engineering
Authors
Jawdat Tashan, Riadh Al-Mahaidi,