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Thermal integrity analysis of intelligent concrete based on optical fiber: taking concrete shaft as an example

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Document pages: 8 pages

Abstract: Concrete is the most widely used building material in the world. The integrity of concrete during pouring will greatly affect its engineering performance. Using the heat generated during concrete curing, we propose a thermal integrity analysis (tip) method based on optical fiber, which can comprehensively and accurately evaluate the integrity of concrete immediately after concrete pouring. Taking the concrete shaft as an example, this paper uses the optical fiber as the temperature sensor to detect its tip, and obtains the temperature data with high spatial resolution. Our method is compared with current thermal infrared probes or concrete shaft tips based on embedded thermal sensors. This innovation makes it possible to detect internal defects of the concrete shaft with thorough details, including size and location. First, we establish a 3D shaft model to simulate temperature distribution of concrete shaft. Then, we extract temperature distribution data at the location where the optical fiber would be installed. Based on the temperature distribution data, we reconstruct a 3D model of the concrete shaft. Evaluation of the concrete integrity and the existence of the potential defect are shown in the paper. Overall, the optical-fiber-based TIP method shows a better determination of defect location and size.

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