102. A Rapid Measurement Technique for Determining Particle Penetration of Industrial Ductwork

2002 ◽  
Author(s):  
T. Peters ◽  
D. Leith
Keyword(s):  
Measurement Technique ◽  
Rapid Measurement ◽  
Particle Penetration

Use of backscattered electron image intensity signals to calculate the water/cement ratio of concrete

1992 ◽  
Vol 50 (1) ◽  
pp. 356-357
Author(s):  
R. J. Lee ◽  
A. J. Schwoeble ◽  
Yuan Jie
Keyword(s):  
Reliable Data ◽  
X Ray ◽  
Rapid Measurement ◽  
Trained Personnel ◽  
Electron Image ◽  
Backscattered Electron ◽  
Production Period ◽  
Strength And Durability ◽  
Automated Procedures ◽  
Standard Density

Water/Cement (W/C) ratio is a very important parameter affecting the strength and durability of concrete. At the present time, there are no ASTM methods for determining W/C ratio of concrete structures after the production period. Existing techniques involving thin section standard density comparative associations using light optical microscopy and rely on visual comparisons using standards and require highly trained personnel to produce reliable data. This has led to the exploration of other methods utilizing automated procedures which can offer a precise and rapid measurement of W/C ratio. This paper discusses methods of determining W/C ratio using a scanning electron microscope (SEM) backscattered electron image (BEI) intensity signal and x-ray computer tomography.

The Sine Method: An Alternative Height Measurement Technique

2011 ◽  
Author(s):  
Don C. Bragg ◽  
Lee E. Frelich ◽  
Robert T. Leverett ◽  
Will Blozan ◽  
Dale J. Luthringer
Keyword(s):  
Measurement Technique ◽  
Height Measurement
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