Material Testing of Natural Stones Used in Historical Buildings Based on Scanning Electron Microscopy and Nanoindentation

2013 ◽  
Vol 586 ◽  
pp. 186-189
Author(s):  
Petr Koudelka ◽  
Daniel Kytýř ◽  
Veronika Koudelková ◽  
Jaroslav Lukeš ◽  
Tomáš Doktor ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Historical Buildings ◽  
Heritage Preservation ◽  
Local Characteristics ◽  
Natural Stones ◽  
Processing Techniques ◽  
Signal Processing Techniques ◽  
Scanning Electron

In the case of material parameters required for evaluation of built heritage preservation state, knowledge of the least possible volume of removed sample is essential in order to minimize damage accumulation to the buildings. These requirements lead to determination of representative volume element (RVE) that was in this paper calculated using combination of image and signal processing techniques. Then, a detailed map of material properties was created using nanoindentation to evaluate local characteristics of the material. Furthermore, atomic composition of samples was quantified by energy dispersive spectrometry (EDX) detector for scanning electron microscopy (SEM) device. Presented method based on combination of SEM, EDX and nanoindentation techniques demonstrates possibility of effective testing in the field of historical buildings preservation.

scholarly journals Clay-Based Brick Porosity Estimation Using Image Processing Techniques

2019 ◽  
Vol 29 (1) ◽  
pp. 1226-1234
Author(s):  
Safa Jida ◽  
Hassan Ouallal ◽  
Brahim Aksasse ◽  
Mohammed Ouanan ◽  
Mohamed El Amraoui ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Image Processing ◽  
Scanning Electron Microscopy ◽  
Computer Vision ◽  
Image Processing Techniques ◽  
Processing Techniques ◽  
Porosity Estimation ◽  
Microscopy Images ◽  
Scanning Electron

Abstract This work intends to apprehend and emphasize the contribution of image-processing techniques and computer vision in the treatment of clay-based material known in Meknes region. One of the various characteristics used to describe clay in a qualitative manner is porosity, as it is considered one of the properties that with “kill or cure” effectiveness. For this purpose, we use scanning electron microscopy images, as they are considered the most powerful tool for characterising the quality of the microscopic pore structure of porous materials. We present various existing methods of segmentation, as we are interested only in pore regions. The results show good matching between physical estimation and Voronoi diagram-based porosity estimation.

scholarly journals Defects of copper patina / Vady mìdìných patin

2015 ◽  
Vol 59 (3) ◽  
pp. 87-90 ◽  
Author(s):  
J. Stoulil ◽  
P. Šedá ◽  
M. Anisová ◽  
Z. Fencl ◽  
P. Novák ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Image Analysis ◽  
Compact Surface ◽  
Historical Buildings ◽  
X Ray Diffraction ◽  
X Ray ◽  
Destructive Analysis ◽  
High Degree ◽  
Scanning Electron

Abstract The paper is focused on analyses of dark copper patina defects that were formed on one sheet under the same conditions. Roofs of ten historical buildings were studied by image analysis and samples of two roofs were subjected to more detailed destructive analysis. These samples were studied by means of scanning electron microscopy with energy dispersive X-ray spectroscopy, X-ray diffraction and infrared spectroscopy. Both types of patina are composed of brochantite. Green patinas consisted of a pure brochantite and they had a fl at and compact surface. Conversely, black patina contained a high degree of impurities (ammonia cations, nitrates, silicates) and the surface was rough. The proportion of dark patina was higher in south and east facing surfaces, where washing by rainfall is more difficult.

scholarly journals The use of scanning electron microscopy to the study of the painting from the Church in Radcze

2013 ◽  
Vol 12 (4) ◽  
pp. 095-105
Author(s):  
Beata Klimek
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Electron Microscope ◽  
Historic Buildings ◽  
X Ray ◽  
Composition And Structure ◽  
The Church ◽  
Diagnosis Technique ◽  
Scanning Electron

One of the main tasks in the study of historic buildings is the need to identify the original materials and extensions, which often have historic character. The next task concerns the determination of the composition and structure of the historical, diagnosis technique to develop original paint. The article presents the preliminary results of paintings. Methods were used with the scanning electron microscope was equipped with an energy dispersive X-ray spectrometer (SEM-EDS).

Determination of the Thicknesses and Visualization of Ion-Exchange Waveguides in Glasses by Scanning Electron Microscopy

2019 ◽  
Vol 64 (3) ◽  
pp. 418-421 ◽  
Author(s):  
A. I. Lihachev ◽  
A. V. Nashchekin ◽  
R. V. Sokolov ◽  
S. G. Konnikov
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Ion Exchange ◽  
Scanning Electron

The Distribution of Diatom in the Five Lakes along the Yangtze River

2013 ◽  
Vol 850-851 ◽  
pp. 1309-1312
Author(s):  
Yu Zhou ◽  
Quan Yu ◽  
Wei Hang ◽  
Yu Zhong Wang ◽  
Hui Pin Wang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Water Samples ◽  
Yangtze River ◽  
Water Bodies ◽  
The Yangtze River ◽  
Significant Difference ◽  
The Future ◽  
Scanning Electron

In order to investigate the diatom distribution in the five lakes along the Yangtze River, and discuss the significance for the diagnosis of drowning. 6 water samples were collected in the five lakes along Yangtze River in June, 2012. Subsequently, The genus and the quantity of the diatoms in the water samples were investigated using scanning electron microscopy (SEM). The result showed us that there was significant difference between the waters sampled from the different sites . These data on diatom distribution are helpful to the diagnosis of the cause of the death as well as to the determination of the drowning site in cases of drowning. Therefore, it is necessary to develop the database of diatoms in more extensive water bodies for the forensic diagnosis of drowning in the future.

The Determination of Fabric Loop Length

1977 ◽  
Vol 47 (12) ◽  
pp. 795-801 ◽  
Author(s):  
T. J. Little ◽  
A. Hepworth
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Loop Length ◽  
Research Association ◽  
Alternative Approach ◽  
The Face ◽  
Course Length ◽  
Recorded Image ◽  
Scanning Electron

An alternative approach towards the measurement of loop length while in fabric form is proposed employing techniques of scanning electron microscopy and aerogrammetry. Distortions inherent in the recorded image have been taken into account by obtaining coordinates at intervals as determined by a micrograph of a cross-ruled grid. The lengths of all the resultant elements have been summed to obtain an estimate of the loop length, which was found to be 4–5% different from that obtained using the HATRA (Hosiery and Allied Trades Research Association, Nottingham, England) Course Length Tester. Some suggestions are offered for improving the estimated loop length by obtaining coordinates for both the face and back views of the same knitted loop. It is proposed that a similar approach would be beneficial towards an understanding of parameters governing the geometry of the knitted loop.

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