intumescent fire protection coating based geocement guzii sergii, phd(eng), senior scientist...
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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: [email protected]
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•BURNING (BURNING RATE)
•COMBUSTIBILITY
•HEAT PRODUCTION
•RESISTANCE TO OPEN FLAME
•FIRE SPREAD OVER SURFACE
•SMOKE PRODUCTION
•TOXICITY OF COMBUSTION PRODUCTS
FIRE SAFETY CRITERIA
3PROTECTION 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
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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
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- 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: Na2O · CaO · Al2O3 · mSiO2 · n H2O
RAW MATERIALS ALKALINE ALUMINOSILICATE BOND
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metakaolin+NaOH+SiO2 amorphous +H2O Na2OAl2O36SiO220H2O
CONSTITUENT MATERIALS AND TEST METHODS
microspheres (product of coal combustion), pellets (alkaline aluminosilicate)
ALKALINE ALUMINOSILICATE BOND
FILLERS
ADDITIVE
powder (limestone)
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CONSTITUENT MATERIALS AND TEST METHODS
ALKALINE ALUMINOSILICATE-BASED COATINGS AFTER EXPOSURE OF TEMPERATURE
CoatingNa2OAl2O36SiO220 H2O + fillers + limestone
Na2O CaO Al2O36SiO2+CO2+20H2O
Temperature
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ALKALINE ALUMINOSILICATE BOND (Na2O6SiO220H2O)
DRYING WITH WARM AIR (t= 323-348K) for 2-4 hrs
SCHEMATIC REPRESENTATION OF PELLET PRODUCTION
Solution of CaCl2 (ρ = 1350 kg/m3)
PELLETS (SIZE – 0.63-2.5 mm)
WASHING IN WATER ( =5-10 min)
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CONSTITUENT MATERIALS AND TEST METHODS
COATING COMPOSITIONS UNDER STUDY
CONSTITUENT No 1 No 2 Alkaline aluminosilicate bond, wt.%
56.4 64.29
Microspheres, wt.% 35.6 -
Pellets, wt.% - 28.57
Limestone powder, wt.% 8.0 7.14
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
mm
mm
mm
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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 (Na2O6SiO220H2O)
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RESULTS
Electron microphotographs of the fracture surface after exposure of T=773 K
ALKALINE ALUMINOSILICATE-BASED COATINGS
bond
pellets
microspheres
bond
Coating No 1 Coating No 2
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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)
mmmm
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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 mm
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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(kg/s 2
S
m
m – mass loss of test specimen after testing (kg) – duration of test (s)S – surface area of test
specimen (m2)
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RESULTS
FIRE TEST RESULTS
Sample number(Figs 4-
5)
Temperature ofcombustion gas, K
Fire spread(length of wood
deterioration), cm
Loss of weight, g(sample 40×40×150
mm)
pine birchnorm-
specified value
Pine birchnorm-
specified value
pine birchnorm-
specified value
1 - - - - - - - - -
2 403 405 408 7.0 7.5 8.5 18 26 50
3 403 401 408 4.3 2.5 6.5 16 22 50
4 383 383 408 - - - 16 16 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.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).
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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/sm2) 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/sm2, 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 THANK FOR YOUR KIND ATTENTION!KIND ATTENTION!
THANK FOR YOUR THANK FOR YOUR KIND ATTENTION!KIND ATTENTION!
V.D.Glukhovsky Scientific Research Institute for Binders and Materials V.D.Glukhovsky Scientific Research Institute for Binders and Materials Kiev National University of Civil Engineering and ArchitectureKiev National University of Civil Engineering and ArchitectureVozdukhoflotsky pr., 31 Kiev 03Vozdukhoflotsky pr., 31 Kiev 03680680 Ukraine Ukraine email: [email protected]: [email protected]