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Approaches for the generation of stress waves in concrete
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This paper reviews several existing, as well as potential, stress-wave-generating techniques for concrete, which include standard ultrasonic pulse generators, high-energy ultrasonic toneburst systems, and simple impact.Abstract:
This paper reviews several existing, as well as potential, stress-wave-generating techniques for concrete. The generating techniques under study include standard ultrasonic pulse generators, high-energy ultrasonic toneburst systems, and simple impact. In addition, the use of laser sources and ultrasonic lithotripters are proposed. The novelty of this review is that the methods are analyzed considering applications to existing concrete NDE methods. The strengths and weaknesses of each generation technique are discussed. Some of the methods are demonstrated through laboratory tests on a variety of specimen types. A description of each technique and conclusions concerning the appropriateness of each technique are also made.read more
Citations
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Journal ArticleDOI
Depth detection of surface-breaking cracks in concrete plates using fundamental Lamb modes
TL;DR: In this article, a theoretical transfer function for a pulse propagating as Lamb modes is used to study the effects from the dispersion of Lamb modes and the participation of high-order Lamb modes.
Journal ArticleDOI
Acoustic methods for the nondestructive testing of concrete: A review of foreign publications in the experimental field
M. Brigante,Mezhlum A. Sumbatyan +1 more
TL;DR: In this article, a review of the use of acoustic methods for nondestructive testing of concrete is presented, focusing on the analysis of the strength and other physical properties of concrete.
Journal ArticleDOI
Monitoring the setting times and strength gain of mortar using ultrasonic guided waves
Jacob L. Borgerson,Henrique Reis +1 more
TL;DR: In this article, a guided wave approach that characterises the setting and hardening of early-age mortar during the first twenty-four hours of hydration is presented using a through-transmission system, the method measures the energy leakage of the fundamental torsional wave mode from a cylindrical steel rod to the surrounding mortar.
Ultrasound and Sound Generation Alternatives for Concrete Structures
TL;DR: In this paper, the experimental analysis of stress wave generating techniques for application to concrete structures which may serve as alternatives to commonly used techniques Electromechanical and piezoelectric-based sources which are driven by AM burst signals are analyzed.
References
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Journal Article
Use of spectral analysis of surface waves method for determination of moduli and thicknesses of pavement systems.
TL;DR: In this paper, the spectal analysis of surface waves (SASW) method is used for determining moduli and thickness of pavement systems, and the results of three series of tests performed on TX-71 near Columbus, Texas, are presented.
Journal ArticleDOI
A theoretical study of cavitation generated by an extracorporeal shock wave lithotripter.
TL;DR: The intense acoustic wave generated at the focus of an extracorporeal shock wave lithotripter is modeled as the impulse response of a parallel RLC circuit, and the zero-order effect of gas diffusion on bubble response is included.
Journal Article
Moduli of pavement systems from spectral analysis of surface waves
TL;DR: In this article, a new, efficient technique incorporating an impulsive source has been developed to replace the slower, steady-state vibration technique, which is necessary to determine moduli of the various materials in existing pavement systems.