scholarly journals Comparison of different methods for determining the moisture diffusivity of porous building materials

2019 ◽  
Vol 282 ◽  
pp. 02023
Author(s):  
Peng Ren ◽  
Chi Feng ◽  
Hans Janssen
Keyword(s):  
Data Processing ◽  
Calcium Silicate ◽  
Building Materials ◽  
Moisture Diffusivity ◽  
Ceramic Brick ◽  
Step Method ◽  
Ray Method ◽  
Porous Building Materials ◽  
X Ray ◽  
The Common

This paper compares the X-ray method, the ruler method and the multi-step method to non-destructively determine the moisture diffusivity of calcium silicate and ceramic brick. Results show that the ruler method and multi-step method produce acceptable diffusivities and λ-profiles compared with the common X-ray method, meaning that both methods can determine moisture diffusivity reliably to some extent without the expensive X-ray setup and complicated data processing.

Microstructure and transport properties of porous building materials. II: Three-dimensional X-ray tomographic studies

2000 ◽  
Vol 33 (3) ◽  
pp. 147-153 ◽  
Author(s):  
D. P. Bentz ◽  
D. A. Quenard ◽  
H. M. Kunzel ◽  
J. Baruchel ◽  
F. Peyrin ◽  
...  
Keyword(s):  
Transport Properties ◽  
Building Materials ◽  
Three Dimensional ◽  
Porous Building Materials ◽  
X Ray

Comparison of Two Different Modes of Inverse Analysis Used for Determination of Moisture Diffusivity of Building Materials

2014 ◽  
Vol 982 ◽  
pp. 49-53 ◽  
Author(s):  
Jan Kočí ◽  
Zbyšek Pavlík ◽  
Robert Černý
Keyword(s):  
Genetic Algorithms ◽  
Laboratory Experiment ◽  
Inverse Analysis ◽  
Building Materials ◽  
Moisture Diffusivity ◽  
Inverse Methods ◽  
Short Discussion ◽  
Porous Building Materials

This paper gives a brief overview of two different approaches within the inverse analysis used for determination of moisture diffusivity of porous building materials. The inverse methods are represented by Boltzman-Matano approach and genetic algorithms. Both methods are described in this paper and its application is demonstrated on a simple laboratory experiment. Finally, the results of both treatments are compared together and short discussion is given.

Untersuchungen von Salztransportprozessen und deren Visualisierung mit Hilfe der Röntgenanalytik / Examination of salt transport processes and their visualisation using X-ray analysis

1998 ◽  
Vol 4 (3) ◽  
pp. 187-208 ◽  
Author(s):  
L. Franke ◽  
F. Pinsler
Keyword(s):  
Building Materials ◽  
Transport Processes ◽  
Salt Transport ◽  
Pore System ◽  
Transport Models ◽  
Porous Building Materials ◽  
X Ray ◽  
First Time

Abstract With the help of X-ray for visualisation of salt transport in porous building materials it is now for the first time possible to check both, the description of salt transport processes as well as the mathematical transport models used. The tests were carried out with sandstone, however the results are transferable to other building materials having a comparable pore system.

Phase Transformations in Ti-7w/oMo-3w/oMe Alloy

1974 ◽  
Vol 32 ◽  
pp. 514-515
Author(s):  
S. Fujishiro
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Transmission Electron Microscopy ◽  
Tensile Strength ◽  
Mechanical Processing ◽  
Ray Method ◽  
X Ray ◽  
Transmission Electron ◽  
Water Quench ◽  
Alpha Beta

The mechanical properties of three titanium alloys (Ti-7Mo-3Al, Ti-7Mo- 3Cu and Ti-7Mo-3Ta) were evaluated as function of: 1) Solutionizing in the beta field and aging, 2) Thermal Mechanical Processing in the beta field and aging, 3) Solutionizing in the alpha + beta field and aging. The samples were isothermally aged in the temperature range 300° to 700*C for 4 to 24 hours, followed by a water quench. Transmission electron microscopy and X-ray method were used to identify the phase formed. All three alloys solutionized at 1050°C (beta field) transformed to martensitic alpha (alpha prime) upon being water quenched. Despite this heavily strained alpha prime, which is characterized by microtwins the tensile strength of the as-quenched alloys is relatively low and the elongation is as high as 30%.

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