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 Ukraine

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

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

4 TASKS TO CREATE ECOLOGICALLY SAFETY HIGHLY EFFICIENT AND DURABLE FIRE PROTECTIVE COATINGS WITH: MINIMUM BURNING RATE HIGH ADHESION TO WOOD SURFACE GOOD PROTECTION OF TIMBER FROM COMBUSTION AND BURNING NO RELEASE OF TOXIC SUBSTANCES IN CASE OF FIRE

5 - aluminosilcate (metakaolin, etc.) -soluble silicates -amorphous silica -sodium hydroxides -organic and inorganic modifiers Reaction products - analogues of natural zeolites and feldspathoids OUTCOME OBJECT OF STUDY SYSTEM: Na 2 O · CaO · Al 2 O 3 · mSiO 2 · n H 2 O RAW MATERIALS ALKALINE ALUMINOSILICATE BOND

6 metakaolin+NaOH+SiO 2 amorphous +H 2 O  Na 2 O  Al 2 O 3  6SiO 2  20H 2 O CONSTITUENT MATERIALS AND TEST METHODS microspheres (product of coal combustion), pellets (alkaline aluminosilicate) ALKALINE ALUMINOSILICATE BOND FILLERS ADDITIVE powder (limestone)

7 CONSTITUENT MATERIALS AND TEST METHODS ALKALINE ALUMINOSILICATE-BASED COATINGS AFTER EXPOSURE OF TEMPERATURE CoatingNa 2 O  Al 2 O 3  6SiO 2  20 H 2 O + fillers + limestone Na 2 O  CaO  Al 2 O 3  6SiO 2 +CO 2 +20H 2 O Temperature

8 ALKALINE ALUMINOSILICATE BOND (Na 2 O  6SiO 2  20H 2 O) DRYING WITH WARM AIR (t= K) for 2-4 hrs SCHEMATIC REPRESENTATION OF PELLET PRODUCTION Solution of CaCl 2 ( ρ = 1350 kg/m 3 ) PELLETS (SIZE – mm) WASHING IN WATER (  =5-10 min)

9 CONSTITUENT MATERIALS AND TEST METHODS COATING COMPOSITIONS UNDER STUDY CONSTITUENTNo 1No 2 Alkaline aluminosilicate bond, wt.% Microspheres, wt.%35.6- Pellets, wt.% Limestone powder, wt.%

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

11 RESULTS Electron microphotographs of the fracture surface of the hardened alkaline aluminosilicate bond under study after exposure of T=773 K zeolite-like reaction products of the heulandite types ALKALINE ALUMINOSILICATE BOND (Na 2 O  6SiO 2  20H 2 O)

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

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

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

15 RESULTS 1 – uncoated sample; 2 – coated sample (Coating "Siofarb"); 3 – coated sample (Coating No 1); 4 – coated sample (Coating No 2) 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 (m 2 )

16 RESULTS FIRE TEST RESULTS Sample number (Figs 4-5) Temperature of combustion gas, K Fire spread (length of wood deterioration), cm Loss of weight, g (sample 40×40×150 mm) pinebirch norm- specified value Pinebirch norm- specified value pinebirch norm- specified value  8.5   6.5    20 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 ); the coating No 2 – non-burnable material; in combustion- all formulated coatings- as hardly combustible materials (Group 1, DSTU B V ).

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… kg/s  m 2 ) 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 kg/s  m 2, being by 1.03…1.07 fold 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.

THANK FOR YOUR KIND ATTENTION! V.D.Glukhovsky Scientific Research Institute for Binders and Materials Kiev National University of Civil Engineering and Architecture Vozdukhoflotsky pr., 31 Kiev Ukraine Kiev National University of Civil Engineering and Architecture Vozdukhoflotsky pr., 31 Kiev Ukraine