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INTUMESCENT FIRE PROTECTION COATING BASED GEOCEMENT

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  1. INTUMESCENT FIRE PROTECTION COATING BASED GEOCEMENT Guzii Sergii,PhD(Eng), Senior Scientist V.D.Glukhovsky Scientific Research Institute for Binders and Materials Kiev National University of Civil Engineering and Architecture. Vozdukhoflotsky pr., 31 Kiev 03680 Ukraine email: pavlo.kryvenko@gmail.com

  2. FIRE SAFETY CRITERIA • BURNING (BURNING RATE) • COMBUSTIBILITY • HEAT PRODUCTION • RESISTANCE TO OPEN FLAME • FIRE SPREAD OVER SURFACE • SMOKE PRODUCTION • TOXICITY OF COMBUSTION PRODUCTS

  3. PROTECTION OF TIMBER PROTECTION OF TIMBER FROM COMBUSTION AND BURNING IMPREGNATINGFIRE AND FIRE-BIO PROTECTIVE COMPOSITIONS FIRE PROTECTIVE PAINTS FIRE PROTECTIVE PASTES, COATINGS FIRE PROTECTIVE VARNISHES FIRE RETARDANTS AND ANTISEPTIC SOLUTIONS IN INORGANIC AND ORGANIC LIQUIDS FIRE RETARDANTS AND PIGMENTSIN INORGANIC AND ORGANIC LIQUIDS HOMOGENEOUS SUSPENSION FIRE RETARDANTS AND FILLERS BASED ON INORGANIC AND ORGANIC LIQUIDS IN PASTE-LIKE CONSISTENCY SOLUBLE FILM-FORMING SUBSTANCES FLAME RETARDANTS IN INORGANIC AND ORGANIC LIQUIDS NON INTUMENSCENT (HEAT ISOLATING) INTUMENSCENT DISADVANTAGES: WASHOUT TOXICITY OF ORGANIC MATRIX COMBUSTION DISADVANTAGES : LOW ADHESION TOXICITY OF ORGANIC BASE WHILE BURNING

  4. TASKS • TO CREATE ECOLOGICALLY SAFETYHIGHLY EFFICIENT AND DURABLE FIRE PROTECTIVE COATINGS WITH: • MINIMUM BURNING RATE • HIGH ADHESION TO WOOD SURFACE • GOOD PROTECTION OF TIMBERFROM COMBUSTION AND BURNING • NO RELEASE OF TOXIC SUBSTANCES IN CASE OF FIRE

  5. OUTCOME OBJECT OF STUDY SYSTEM: Na2O ·CaO·Al2O3·mSiO2·n H2O ALKALINE ALUMINOSILICATE BOND RAW MATERIALS - aluminosilcate (metakaolin, etc.) - soluble silicates - amorphous silica - sodium hydroxides - organic and inorganic modifiers Reaction products - analogues of natural zeolites and feldspathoids

  6. CONSTITUENT MATERIALS AND TEST METHODS ALKALINE ALUMINOSILICATE BOND metakaolin+NaOH+SiO2amorphous+H2O  Na2OAl2O36SiO220H2O FILLERS microspheres (product of coal combustion), pellets (alkaline aluminosilicate) ADDITIVE powder (limestone)

  7. CONSTITUENT MATERIALS AND TEST METHODS ALKALINE ALUMINOSILICATE-BASED COATINGS AFTER EXPOSURE OF TEMPERATURE Temperature Coating Na2OAl2O36SiO220 H2O + fillers + limestone Na2O CaOAl2O36SiO2+CO2+20H2O

  8. SCHEMATIC REPRESENTATION OF PELLET PRODUCTION ALKALINE ALUMINOSILICATEBOND (Na2O6SiO220H2O) Solution of CaCl2(ρ= 1350 kg/m3) PELLETS (SIZE – 0.63-2.5 mm) WASHING IN WATER(=5-10 min) DRYING WITH WARM AIR (t= 323-348K) for 2-4 hrs

  9. CONSTITUENT MATERIALS AND TEST METHODS COATING COMPOSITIONS UNDER STUDY

  10. TEST METHOD SCHEME OF TESTING A BURNING BEHAVIOR OF THE WOOD SAMPLES mm mm mm mm 1 – test specimen (35×40×150 mm); 2 – test pipe; 3 – flame produced by a gasoline blow torch

  11. RESULTS ALKALINE ALUMINOSILICATEBOND (Na2O6SiO220H2O) zeolite-like reaction products of the heulandite types Electron microphotographs of the fracture surface of the hardened alkaline aluminosilicate bond under study after exposure of T=773 K

  12. pellets bond bond microspheres RESULTS ALKALINE ALUMINOSILICATE-BASED COATINGS Electron microphotographs of the fracture surface after exposure of T=773 K Coating No 1 Coating No 2

  13. RESULTS VIEW OF THE SAMPLES FROM PINE AFTER FIRE TESTS mm mm 1 – uncoated sample; 2 – coated sample (the coating “Siofarb");3 – coated sample (Coating No 1); 4 – coated sample (Coating No 2)

  14. RESULTS VIEW OF THE SAMPLES FROM BIRCH AFTER FIRE TESTS mm mm 1 – uncoated sample; 2 – coated sample (the coating "Siofarb");3 – coated sample (Coating No 1); 4 – coated sample (Coating No 2)

  15. RESULTS BURNING RATE (υ) OF THE SAMPLES OF PINE AND BIRCH m – mass loss of test specimen after testing (kg) – duration of test (s) S – surface area of test specimen (m2) 1 – uncoated sample; 2 – coated sample (Coating "Siofarb");3 – coated sample (Coating No 1); 4 – coated sample (Coating No 2)

  16. RESULTS FIRE TEST RESULTS In accordance with the results of fire tests the formulated protective coatings can be classified as the following: the coating No 1 - hardly burnable material (Group 1, DSTU B B.1.1-2-97); the coating No 2 – non-burnable material; in combustion- all formulated coatings- as hardly combustible materials (Group 1, DSTU B V.2.7-19- 95).

  17. CONCLUSIONS • The samples of wood covered with the formulated protective coatings burn slowly and are hardly combustible materials, loss of weight after fire exposure on protected samples is by 1.2…1.6 fold lower compared to that of the analogue (Coating “Siofarb”). • The lowest burning rate(0.0020…0.0024 kg/sm2) was characteristic of the intumescent coating No2, being by 1.3…1.6 fold lower than a critical value and by 2.08…4.15 fold lower as compared with that of the analogue (Coating “Siofarb”). • Coating No 1 has a burning rate of 0.0030-0.0031 kg/sm2, being by 1.03…1.07fold lower compared to a critical value and by 1.61…2.77 fold lower compared to that of the analogue (Coating “Siofarb”); • Under exposure of fire the coatings produce mainly water vapours.

  18. THANK FOR YOUR KIND ATTENTION! THANK FOR YOUR KIND ATTENTION! V.D.Glukhovsky Scientific Research Institute for Binders and Materials Kiev National University of Civil Engineering and ArchitectureVozdukhoflotsky pr., 31 Kiev 03680 Ukraine email: pavlo.kryvenko@gmail.com