COLORIMETRIC CONTROL OF CEMENTS BY MOBILE DEVICES
Colorimetric characteristics were obtained in the RGB color model of portland cement (C E M I 42.5 N), chalk, lime, fly ash, as well as binary and ternary mixtures of portland cement with mineral additives. The range of the content of mineral additives in the mixtures was 5 - 3 0%. To analyze the color parameters, smartphones of various manufacturers, plastic microplates, and various software packages for electronic image processing on mobile devices were used. It is shown that colorimetric control using smartphones is suitable for the rapid detection in cement of additives that differ from it in terms of color parameters. The colorimetric method of controlling the color of cement products with the use of smartphones is characterized by the simplicity of video signal recording, low cost, and express analysis.