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Concrete Crack Detection and Monitoring Using a Capacitive Dense Sensor Array.

Jin Yan1, Austin Downey2, Alessandro Cancelli3

  • 1Department of Civil, Construction and Environmental Engineering, Iowa State University, 813 Bissell Road, Ames, IA 50011, USA. yanjin@iastate.edu.

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Summary
This summary is machine-generated.

A new soft elastomeric capacitor (SEC) sensing skin effectively monitors concrete cracks. This low-cost technology accurately detects, localizes, and quantifies cracks in various concrete structures, enhancing structural safety and maintenance.

Keywords:
crackdistributed dense sensor networkstrainstructural health monitoring

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Area of Science:

  • Materials Science
  • Civil Engineering
  • Structural Health Monitoring

Background:

  • Cracks in concrete structures indicate damage, impacting durability and safety.
  • Timely crack identification is crucial for structural integrity and maintenance.
  • Existing monitoring systems (strain gauges, fiber optics) are costly for large surfaces.

Purpose of the Study:

  • To introduce and validate a novel sensing skin for concrete crack monitoring.
  • To assess the efficacy of soft elastomeric capacitors (SEC) for structural health monitoring.
  • To demonstrate a low-cost, robust solution for detecting cracks in large concrete structures.

Main Methods:

  • Development of a flexible electronic sensing skin using soft elastomeric capacitors (SEC).
  • Detection of strain changes via capacitance variations.
  • Validation on small-scale reinforced and full-scale post-tensioned concrete beams.

Main Results:

  • The SEC sensing skin successfully detected, localized, and quantified cracks.
  • Preliminary validation on a small-scale beam was confirmed on a full-scale specimen.
  • The technology proved effective for both reinforced and post-tensioned concrete.

Conclusions:

  • The novel SEC sensing skin is a viable, low-cost technology for concrete crack monitoring.
  • This approach offers a robust and scalable solution for structural health monitoring.
  • The findings support enhanced structural safety and proactive maintenance of concrete infrastructure.