Abstract
The results of experimental studies of the behavior of fireproof materials of Russian production – OGNEZA-LTU, OGNEZA-M-KOR, OG-NEZA-M-KOR (NG), «OGNEBAZALT» PMBOR, OGNEZA-GT under thermal action are presented. Research method – synchronous thermal analysis TG/DCS/dDSC, including differential scanning calorimetry (DSC) and thermogravimetry (TG). Experimental conditions on the NETZSCH thermal analyzer: measurement mode – TG/DCS/dDSC; heating rate: 20 °C /min; heating – up to 1000 °С; atmosphere – N2. The rates of weight loss of the investigated fire-retardant materials have been studied. A high rate of weight loss was established for the OGNEZA-LTU samples (20.5 %/ min at 335 °C) and OGNEZA-GT (11.9 %/min at 369 °C); low – OGNEZA-M-KOR (NG) – 1.7 %/min at 349 °C, OGNEZA-M-KOR – 6.1%/min at 341 °C, «OGNEBASALT» PMBOR - 3.5 %/min at 388 °С. Time intervals of weight loss were determined: all test samples had maximum weight loss in the range of 15-20 minutes. The temperature ranges of the maximum rate of weight loss were determined: 349 - 388 °C. The best heat-resistant properties were shown by OGNEZA-M-KOR (NG), «OGNEBASALT» PMBOR, OGNEZA-M-KOR. It is proposed to consider the revealed properties when using fire retardant materials for the constructive fire hazard of civil and industrial facilities.
Highlights
An urgent task of our time is the production and use of fireproof materials to increase the stability of buildings and structures in the event of a fire and the accumulation of knowledge about the behavior of materials under temperature exposure
After heating the OGNEZA-LTU sealant sample (Figure 2) from 271 to 351 °C at [11,12,13,14,15,16] minutes of testing, an increase and decrease in the sample mass are observed in a chaotic manner, which can be explained by the process of swelling and burnout of the organic components of the sealant composition in the resulting loose material structure
The swelling of the sample in conjunction with a smooth decrease in mass can be attributed to the advantage of the material
Summary
An urgent task of our time is the production and use of fireproof materials to increase the stability of buildings and structures in the event of a fire and the accumulation of knowledge about the behavior of materials under temperature exposure. The thermal properties of fire retardant materials are important parameters for use on a specific protected object. Data on thermal properties, especially on the rate of weight loss of Russianmade fire-resistant materials, are scarce [13-18]. Purpose of the research: to study the effect of temperature on the properties of Russianmade fire-retardant materials. Research objectives: - study of the rate of weight loss of fire retardant materials; - determination of temperature ranges for weight loss; - determination of materials with the best heat-resistant properties. Petersburg, and OGNEBAZALT MSK LLC, Balashikha, Moscow region (Figure 1): - fire-fighting tape OGNEZA-LTU and seals: OGNEZA-M-KOR and OG-NEZA-M-KOR (NG); - fire retardant material «OGNEBASALT»PMBOR; - fire retardant thermo-expanding sealant OGNEZA-GT in the form of mineral wool heatinsulating plate
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