Wireless Sensing of Concrete Setting Process

Area of Science:

• Civil Engineering
• Materials Science
• Embedded Systems

Background:

• The setting process of cement-based materials is critical for structural integrity.
• Traditional methods for monitoring concrete setting are often invasive or labor-intensive.
• Real-time, non-destructive monitoring is essential for quality control in construction.

Discussion:

• This paper introduces a novel Radio Frequency Identification (RFID)-based wireless system for monitoring the setting process of cement-based materials.
• The system utilizes an embedded wireless RFID temperature sensor within the concrete, communicating with an external RFID reader.
• Temperature evolution over time serves as a key indicator for assessing the concrete's setting progression.

Key Insights:

• A fully characterized Ultra-Wideband (UWB) Bow Tie antenna operating at 868 MHz, matched to an EM4325 temperature chip via a T-match structure, enables embedded sensor operation.
• The wireless system effectively measures temperature fluctuations within concrete during the setting phase.
• Real-scenario measurements validate the system's performance and applicability.

Outlook:

• This technology offers potential for enhanced quality control and predictive maintenance in civil engineering projects.
• Further research could explore integration with other sensing modalities for comprehensive material characterization.
• The system's adaptability may extend to other thermosetting materials beyond concrete.