Application of Cement-Based Sensor on Compressive Strain Monitoring in Concrete Members

Abstract:

The aim of this research was to implement cement-based sensors in monitoring the change of strain in concrete structures in particular where a compression applies. The experiment was conducted in a laboratory by embedding a cement-based sensor in a 150x150x150 mm normal strength concrete cube. When the sensor-installed concrete cube was loaded, the relation between the fractional change in resistivity (FCR) and strain of the sensors was evaluated. In this study, all cement-based sensors were made of cement paste containing carbon fiber at 2% by volume fraction. They were then varied with the addition of graphite powder at 4% and silica fume at 15% by weight of cement. Thus, there were total four mix proportions. From the experimental results, all sensors provided a good corelation between the FCR and compressive strain. Among them, the carbon fiber plus graphite powder (no silica fume) cement-based sensor yielded the most excellent piezoresistive response.

• Periodical: Advanced Materials Research (Volumes 931-932)
• Pages: 446-450
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.931-932.446
• Online since: May 2014
• Authors: Kraisit Loamrat, Manote Sappakittipakorn*, Piti Sukontasukkul
• Keywords: Carbon Fiber (CF), Cement-Based Sensor, Graphite Powder, Piezoresistivity

References

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DOI: 10.1002/maco.201005777