Laser ultrasonics for surface-crack depth measurement using transmitted near-field Rayleigh waves

2000 ◽  
Author(s):  
C. M. Scala
Keyword(s):  
Surface Crack ◽  
Rayleigh Waves ◽  
Near Field ◽  
Crack Depth ◽  
Laser Ultrasonics ◽  
Depth Measurement ◽  
Crack Depth Measurement

Self-calibrating ultrasonic technique for crack depth measurement

1992 ◽  
Vol 11 (2) ◽  
pp. 103-108 ◽  
Author(s):  
J. D. Achenbach ◽  
I. N. Komsky ◽  
Y. C. Lee ◽  
Y. C. Angel
Keyword(s):  
Crack Depth ◽  
Ultrasonic Technique ◽  
Depth Measurement ◽  
Crack Depth Measurement

scholarly journals Flexural Rigidity in Concrete Beam by using the Crimped Steel Fibers with Rapid Hardening Admixtures

2019 ◽  
Vol 8 (6) ◽  
pp. 1677-1681
Keyword(s):  
Fly Ash ◽  
Flexural Rigidity ◽  
Concrete Strength ◽  
Crack Depth ◽  
Steel Fibers ◽  
Fine Aggregate ◽  
Test Results ◽  
Rapid Hardening ◽  
Depth Measurement ◽  
Crack Depth Measurement

With the increase in the fast track construction industries, the emerging techniques are used for improvement in the concrete strength and its properties. This paper focused on the test results for various mixes of concrete made by replacing OPC cement content with slag and fly ash in varying proportions the use of rapid hardening admixture along with the presence of crimped steel fibers. The flexural strength, crack depth measurement by using the ultrasonic pulse velocity and Elastic modulus of concrete were conducted with different proportions of fly ash (0-15%) and slag (0-25%) being replaced in cement and 0-50% of the fine aggregate is replaced with stone dust. The experimental test results show the volume reduction in flexural members, crack depth measurement by UPV and modulus of elasticity of concrete by scant modulus method was used for various mixes.

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