The influence of moisture on the colour characteristics of natural stone
Journal Title: Вісник Житомирського державного технологічного університету. Серія: Технічні науки - Year 2018, Vol 82, Issue 2
Abstract
The objects of the research are the facing elements of buildings and architectural monuments. The subject of the study is the process of changing the colour of the decorative stone from moisture. To solve the problems of analyzing the appearance of the surface, it is necessary to form a digital image of the surface of the facing stone and perform its processing by means of modern computer technology. Natural stone darkens in places where there is moisture in the pores. The paper investigated the component L, which is responsible for the lightness in the Lab colour system , the study was conducted on samples with a length of 600 mm and a width of 300 mm with a thickness of 24, 25, 31, 32 mm. To determine the humidity of the samples Hydro Condtrol device was used; it is based on the dielcometric method of measuring the humidity. After 100 hours of exposure to moisture at Pokostivsky granodiorite, the reduction of component L, which is responsible for the lightness in the Lab colour system, actually stops. There is a directly proportional dependence of the height of moisture rise in the samples of natural stone on their thickness, which is associated with an increase in the number of pores that participate in the liquid transfer process. With increasing duration of exposure to moisture at Pokostivsky granodiorite the moisture of the sample surface increases, which can be predicted in the general case and for different values of the thickness of the samples using analytical expressions. Comparison of intensity of value change of components L, which is responsible for the lightness in the Lab colour system and surface moisture of the samples, allows to draw a conclusion about the absence of an explicit connection between the above-mentioned processes.
Authors and Affiliations
V. V. Korobiichuk, R. V. Sobolevskyi, O. M. Sydorov, V. I. Shamrai, V. O. Shlapak
Keywords
Related Articles
- EP ID EP420919
- DOI -
- Views 107
- Downloads 0
Method of selection of rational characteristics of switching process of automatic vehicle two-flows transmission
In order to improve the work of automotive transmission the analysis of transients during switching gear is performed. The proposed algorithm of control gear process in double-flow transmission takes into account the dif...
Scientific and practical problems of reflection of land resources in accounting
The implementation of the land market in Ukraine actualizes the problems of accounting of land resources from viewpoints of generation of accurate and trustworthy information about quantitative, qualitative, and cost ind...
Connection between surface microrelief of friction pairs and intensity of their attrition in non-stationary exploitation conditions
Comparing with the previous publications related to surface microrelief of friction pairs, this article focuses on investigation of workpiece surface interaction having different or similar, fully or partially regular sl...
New concept of fiber reinforced shotcrete for geotechnical applications
The article proposed to use the specific surface area of the fibers to calculate the tensile strength of the fiber reinforced concrete and shotcrete. Graphs of the tensile strength dependences on the fiber diameter and l...
Formation of effective organizational structure of accounting service
The purpose of the article is to determine the optimal organizational structure of the accounting service to improve the performance of this unit and the enterprise as a whole. The influence of factors of the accounting...