EVALUATION OF THE RESISTANCE OF PIGMENTS IN COLORED CEMENTS USING MOBILE DEVICES
The article is devoted to assessing the stability of pigments in colored cements, which are increasingly used in industrial and civil construction. The color must correspond to the standard set for each plant individually. At the same time, the definition of such an important aesthetic parameter as color is subjective, there is no approved instrumental method of evaluation. It is proposed to use digital colorimetry (D C M) using smartphones to control the color stability of cements containing mineral and organic pigments. For calculations, we used the R G B color scale and available software for smartphones. It is shown that the dependence of cement color on the content of pigments is well described by semilogarithmic functions. The colors of Portland cement were evaluated after preliminary heat and humidity treatment and irradiation with an ultraviolet lamp. The use of D C M allowed us to give a quantitative characteristic of color stability.