UDC 614.841.45
The relevance of the work is due to the lack of effective means for operational non-destructive quality control of fire-resistant treatment of wooden structures (hereinafter referred to as DCS) in the field. Existing methods regulated by current standards either require sampling (violation of structural integrity), or use an open flame, or are subjective. The aim of the study was to develop a scientifically sound methodology and create a prototype portable device that allows for a quick and objective assessment of the availability and quality of flame retardant impregnation based on their colorimetric response to standardized thermal effects. A comprehensive critical analysis of existing control methods has been carried out, and their systemic shortcomings have been identified. In the course of laboratory experiments, quantitative dependences of changes in color characteristics (in the R channel of the RGB model) for three main building wood species (pine, spruce, larch) on the temperature of short-term contact heating (150-250 °C) and the fact of treatment with a flame retardant based on boron salts were established. Based on the revealed regression dependencies, a device design has been developed and tested that integrates a heating unit with a regulator and a digital color sensor. It has been statistically confirmed that at a heating temperature of 240 °C, the difference in R values between untreated wood and samples treated in two layers exceeds 30 units for all the studied rocks, which is a reliable diagnostic sign. Detailed methodological recommendations on the use of the device for field examinations have been developed and presented. The main conclusion of the article is that the developed device and methodology make it possible to eliminate the key shortcomings of existing approaches, providing fast, safe, objective and non-destructive testing, which significantly increases the effectiveness of state fire supervision and the assessment of the quality of fire protection work
ognezaschitnaya obrabotka drevesiny, kontrol' kachestva, nerazrushayuschiy metod, ekspress-pribor, cvetoizmerenie, kolorimetriya, termicheskoe vozdeystvie, piroliz, antipireny, pozharnaya bezopasnost'
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