Curing Strength Monitoring of Early-Age Concrete Based on Velocity of Guided Wave Using Embedded Plate-Type PZT Sensor Module

Abstract:

In this study, a guided wave based nondestructive curing strength monitoring method is proposed to monitor the curing strength of the early-age concrete. This approach used the embedded steel plate-type PZT sensor module which was fabricated by bonding the two pieces of piezoelectric sensor to a steel plate. The steel plate provided the constant path for guided wave propagation and it protected the piezoelectric sensors from impacts and environmental variations. To measure the guided wave signals from the early-age concrete, fabricated sensor modules were landfilled at the same time with concrete placement.While the concrete was curing, guided wave signals were measured by pitch-catch method continuously at regular intervals. Wavelet transform process was performed to improve the quality of the signal by removing the signal’s noise of undesired frequencies. The TOF (Time of flight) of guidedwave was extract from de-noised signal using peak tracing algorithm to calculate the velocity of wave. The calculated wave velocity hysteresis according to the curing time was traced to analysis the pattern of variations of wave velocity. Finally, specific equations to estimate the strength of the concrete were derived using regression analysis based on the wave velocity and compressive strength from destructive compressive strength test.

• Periodical: Applied Mechanics and Materials (Volume 281)
• Pages: 645-648
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.281.645
• Online since: January 2013
• Authors: Ju Won Kim, Eun Seok Shin, Chang Gil Lee, Seung Hee Park, Seo Kinn Hong
• Keywords: Curing Strength Monitoring, Early-Age Concrete, Embedded Steel Plate-Type PZT Sensor Module, Guided Wave, Regression Analysis

References

[1] P. K. Mehta and P. J.M. Monterio: Concrete: microstructure, properties, and materials (McGraw Hill Companies, New York 2006).

[2] H. Irie, Y. Yoshida,Y. Sakurada and T. Ito: NTT Technical ReviewVol. 6 (2008), pp.1-8.

[3] J. F. Lamond and J. H. Pielert: Significance of tests and properties of concrete & concrete-making materials (ASTM International, New York 2006).

DOI: 10.1520/stp169d-eb

[4] J. -W. Kim, C. Lee and S Park: Advanced Science Letters Vol. 4 (2011) pp.1-6.

[5] C. Lee and S. park: Smart Materials and StructuresVol. 20 (2011) 115002.

[6] T. Rudy, H. -K. Lee and S. Park: Smart Structures and SystemsVol. 6, No. 7 (2010) pp.851-866.

[7] S. Park, S. R. Anton, J. -K. Kim, D. J. Inman and D. S. Ha: KSCE Journal of Civil Engineering, Vol. 14, No. 6 (2010) pp.889-895.