Application of Digital Optical Microscopy in Materials and Mechanical Engineering: Optical Porosimetry and Crack Detection

Abstract:

Optical microscopy presents an extension of standard methods for pore space description. In this paper two examples of application in materials and mechanical engineering are introduced. The porosity and pore size distribution of two types of AAC are measured. In the second example the thermally induced cracks of cement fiber composite are visually detected and mathematically described. The technology of sample preparation, measurement technique and digital image processing is described, while advantages and disadvantages are discussed.

• Periodical: Advanced Materials Research (Volume 982)
• Pages: 68-73
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.982.68
• Online since: July 2014
• Authors: Kamil Ďurana*, Robert Černý
• Keywords: Building Material, Crack Detection, Image Processing, Microscopy, Optical Porosimetry

References

[1] R. Černý, M. Keppert, J. Kočí, V. Kočí, P. Konvalinka et al, Complex System of Methods for Directed Design and Assessment of Functional Properties of Building Materials and Its Applications. 1. ed. Praha: České vysoké učení technické v Praze, (2013).

[2] T. Benetková, Critical analysis of methods for study of pore structure of cement composites contatingn sexondary raw materials, [diploma thesis], České vysoké učení technické v Praze, (2010).

[3] C.A. Bovik, The essential guide to image processing, Academic Press, (2009).

[4] Image Processing Toolbox for MATLAB, The Mathworks Inc., 2014. [http: /www. mathworks. com/products/image/].

[5] NIS Elements Basic Research Imaging software, Nikon Instruments Europe B.V., 2014. [http: /www. nikoninstruments. com/en_CZ/Products/Software/NIS-Elements-Br-Microscope-Imaging-Software].

[6] Adobe Photoshop CS6, Adobe Systems Software Ireland Ltd., 2014. [http: /www. adobe. com/cz/products/cs6. html].

DOI: 10.18411/svfu-2017-105

[7] M. Jerman, M. Keppert, J. Výborný, R. Černý, Hygric, thermal and durability properties of autoclaved aerated concrete. In: Construction and Building Materials. 2013, vol. 41, no. 1, pp.352-359.

DOI: 10.1016/j.conbuildmat.2012.12.036

[8] M. Jerman, V. Kočí, J. Maděra, J. Výborný, R. Černý, Water and heat transport parameters of materials involved in AAC-based building envelopes In: 1st Central European Symposium on Building Physics. Lodz: Technical University of Lodz, 2010, pp.39-45.

DOI: 10.2495/ht100251

[9] E. Vejmelková, P. Konvalinka, R. Černý, Thermal properties of aramid-fiber reinforced cement composite. In: Concrete under Severe Conditions - Environment and Loading. Leiden: CRC Press/Balkema, 2010, pp.965-972.

DOI: 10.1201/b10552-122

[10] P. Rusinowski and B. Täljsten, Intermediate Crack Induced Debonding in Concrete Beams Strengthened with CFRP Plates — An Experimental Study, Advances in Structural Engineering. 12/6 (2009) 793-806.

DOI: 10.1260/136943309790327699

[11] Y. Liu, S. Teng, Ch-K. Soh, Three-Dimensional Damage Model for Concrete. I: Theory, Journal of engineering mechanics (2008) 72-81.