Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Contactless System for Continuous Monitoring of Early-Age Concrete Properties
It is important to monitor the evolution of concrete stiffening and setting in a continuous fashion because these developments can indicate when to initiate curing strategies, appropriate time windows for sawcutting of contraction joints, the rate of early concrete strength gain, and proper formwork removal times. In the laboratory, early-age concrete setting and hardening have been investigated using penetration resistance or embedded sensors, but these methods have limited suitability for field application. Therefore, an in-place measurement technique for determination of concrete setting times has been sought for many years, particularly because of its potential to provide more reliable information for concrete construction decisions. Recently, contactless ultrasonic testing approaches have been deployed for material characterization and defect detection applications. Staszewski et al applied scanning measurements of ultrasonic waves using three-dimensional laser vibrometry to detect fatigue cracks in metallic structures. Castaings and Cawley used contactless air-coupled ultrasonic transmitter and receiver sets to detect crack-like defects in plates. Safaeinili et al.
Contactless System for Continuous Monitoring of Early-Age Concrete Properties
It is important to monitor the evolution of concrete stiffening and setting in a continuous fashion because these developments can indicate when to initiate curing strategies, appropriate time windows for sawcutting of contraction joints, the rate of early concrete strength gain, and proper formwork removal times. In the laboratory, early-age concrete setting and hardening have been investigated using penetration resistance or embedded sensors, but these methods have limited suitability for field application. Therefore, an in-place measurement technique for determination of concrete setting times has been sought for many years, particularly because of its potential to provide more reliable information for concrete construction decisions. Recently, contactless ultrasonic testing approaches have been deployed for material characterization and defect detection applications. Staszewski et al applied scanning measurements of ultrasonic waves using three-dimensional laser vibrometry to detect fatigue cracks in metallic structures. Castaings and Cawley used contactless air-coupled ultrasonic transmitter and receiver sets to detect crack-like defects in plates. Safaeinili et al.
Contactless System for Continuous Monitoring of Early-Age Concrete Properties
Hajin Choi (Autor:in) / Homin Song / Quang N V Tran / Jeffery R Roesler / John S Popovics
2016
Aufsatz (Zeitschrift)
Englisch
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