Sensors, Vol. 22, Pages 141: Environmental Durability of an Optical Fiber Cable Intended for Distributed Strain Measurements in Concrete Structures

Sensors, Vol. 22, Pages 141: Environmental Durability of an Optical Fiber Cable Intended for Distributed Strain Measurements in Concrete Structures Sensors doi: 10.3390/s22010141 Authors: Ismail Alj Marc Quiertant Aghiad Khadour Quentin Grando Karim Benzarti The present study investigates the environmental durability of a distributed optical fiber sensing (DOFS) cable on the market, commonly used for distributed strain measurements in reinforced concrete structures. An extensive experimental program was conducted on different types of specimens (including samples of bare DOFS cable and plain concrete specimens instrumented with this DOFS cable) that were exposed to accelerated and natural ageing (NA) conditions for different periods of up to 18 months. The instrumentation of both concrete specimens consisted of DOFS cables embedded at the center of the specimens and bonded at the concrete surface, as these two configurations are commonly deployed in the field. In these configurations, the alkalinity of the surrounding cement medium and the outdoor conditions are the main factors potentially affecting the characteristics of the DOFS component materials and the integrity of the various interfaces, and hence impacting the strain transfer process between the host structure and the core optical fiber (OF). Therefore, immersion in an alkaline solution at an elevated temperature or freeze/thaw (F/T) and immersion/drying (I/D) cycles were chosen as accelerated ageing ...
Source: Sensors - Category: Biotechnology Authors: Tags: Article Source Type: research