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 118
- Downloads 0
The method for predicting the quality indices of space optic-electronic images of the visible wave band
The article develops the technique for predicting the quality of cosmic optoelectronic images of the visible range of waves. This technique takes into account the indicators that flow to the final quality of the image, w...
The structure of intelligent agent projecting and the possibilities of its execution
Most of today’s information systems are not designed for independent decision making, behavior of such systems should be incorporated at the design stage. Entering the conditions that are not included by system developer...
Hardware and software and machine-tool simulation with parallel structures mechanisms
The usage spectrum of mechanisms with parallel structure is spreading all the time. The mechanisms of machine-tools and manipulators become more complicated and it is necessary to improve the program-controlled modules....
The control surface of the destroyed parts in a corona discharge
The results of the research of monitoring the surface of metal machine parts by the method of gas discharge visualization are given. For research as the object of a fragment of the shattered shaft is selected. For monito...
Рassenger survey on public transport in Zhitomir and evaluation of the main technical and operational parameters for the choice of city buses
The parameters of the passenger movements in the direction of public transport in Zhitomir are defined and conformity assessment of technical and operational parameters of urban shuttle buses is folded. Firstly, the amou...