Acoustic Emission Behavior of Early Age Concrete Monitored by Embedded Sensors.

ABSTRACT: Acoustic emission (AE) is capable of monitoring the cracking activities inside materials. In this study, embedded sensors were employed to monitor the AE behavior of early age concrete. Type 1-3 cement-based piezoelectric composites, which had lower mechanical quality factor and acoustic impedance, were fabricated and used to make sensors. Sensors made of the composites illustrated broadband frequency response. In a laboratory, the cracking of early age concrete was monitored to recognize different hydration stages. The sensors were also embedded in a mass concrete foundation to localize the temperature gradient cracks.

SUBMITTER: Qin L 

PROVIDER: S-EPMC5456007 | biostudies-other | 2014 Oct

REPOSITORIES: biostudies-other