Automatic Image Analysis Method as a Tool to Evaluate the Anisotropy of Autoclaved Aerated Concrete for Moisture and Heat Transport

被引:1
|
作者
Majerek, Dariusz [1 ]
Sedzielewska, Elzbieta [1 ]
Pasnikowska-Lukaszuk, Magdalena [1 ]
Lazuka, Ewa [1 ]
Suchorab, Zbigniew [2 ]
Lagod, Grzegorz [2 ]
机构
[1] Lublin Univ Technol, Fac Math & Informat Technol, Nadbystrzycka 38, PL-20618 Lublin, Poland
[2] Lublin Univ Technol, Fac Environm Engn, Nadbystrzycka 40B, PL-20618 Lublin, Poland
关键词
measurement methods; image analysis; building materials; material anisotropy; moisture transport; heat transfer; thermal conductivity; CALIBRATION; POROSITY;
D O I
10.3390/ma17194903
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
In this article, the results of studies testing the anisotropy of autoclaved aerated concrete in terms of water and heat transport are presented. Using image analysis techniques, a study was conducted on four different samples of concrete produced in the same process. To ensure the comparability of results, the pictures were taken from a fixed distance with the same lens settings trimmed to a set size. Cross-sectional profiles of the material were examined and were arranged in two directions: perpendicular and parallel to the growth direction occurring in the autoclave. For each block, approximately 4750 objects were obtained, with an average of 2700 objects along the wall and 2050 across it. As a result of the comparative analysis, metrics concerning pores, significantly distinguishing the profile direction, were identified. These included the pore area (area), the maximum and minimum distance between points on the perimeter (Feret, MinFeret), lengths of the major and minor axes of the fitted ellipse (major, minor), and the ratio of the area of selection to its convex hull (solidity). As a reference, standard investigations were conducted for moisture transport using the time domain reflectometry setup and for thermal conductivity values using the steady-state heat flow plate apparatus.
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页数:17
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