INTUMESCENT FIRE PROTECTION COATING BASED GEOCEMENT

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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 pavlo.kryvenko_at_gmail.com
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FIRE SAFETY CRITERIA

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

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PROTECTION OF TIMBER
PROTECTION OF TIMBER FROM COMBUSTION AND BURNING
IMPREGNATING FIRE 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 FILLERS BASED ON INORGANIC
AND ORGANIC LIQUIDS IN PASTE-LIKE CONSISTENCY
FIRE RETARDANTS AND PIGMENTS IN INORGANIC AND
ORGANIC LIQUIDS HOMOGENEOUS SUSPENSION
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
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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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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
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CONSTITUENT MATERIALS AND TEST METHODS
ALKALINE ALUMINOSILICATE BOND
metakaolinNaOHSiO2 amorphous H2O ?
Na2O?Al2O3?6SiO2?20H2O
FILLERS
microspheres (product of coal combustion),
pellets (alkaline aluminosilicate)
ADDITIVE
powder (limestone)
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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?6SiO2CO220H2O
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SCHEMATIC REPRESENTATION OF PELLET PRODUCTION
ALKALINE ALUMINOSILICATE BOND (Na2O?6SiO2?20H2O)
Solution of CaCl2 (? 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
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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
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TEST METHOD
SCHEME OF TESTING A BURNING BEHAVIOR OF THE WOOD
SAMPLES
mm
mm
mm
mm
1 test specimen (3540150 mm) 2 test pipe
3 flame produced by a gasoline blow torch
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RESULTS
ALKALINE ALUMINOSILICATE BOND (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 T773 K
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RESULTS
ALKALINE ALUMINOSILICATE-BASED COATINGS
Electron microphotographs of the fracture surface
after exposure of T773 K
Coating No 1
Coating No 2
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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)
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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)
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RESULTS
BURNING RATE (?) 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)
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RESULTS
FIRE TEST RESULTS
Sample number (Figs 4-5) Temperature of combustion gas, K Temperature of combustion gas, K Temperature of combustion gas, K Fire spread (length of wood deterioration), cm Fire spread (length of wood deterioration), cm Fire spread (length of wood deterioration), cm Loss of weight, g (sample 4040150 mm) Loss of weight, g (sample 4040150 mm) Loss of weight, g (sample 4040150 mm)
Sample number (Figs 4-5) pine birch norm-specified value Pine birch norm-specified value pine birch norm-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 1.21.6 fold
  lower compared to that of the analogue (Coating
  Siofarb).
• The lowest burning rate (0.00200.0024 kg/s?m2)
  was characteristic of the intumescent coating
  No2, being by 1.31.6 fold lower than a critical
  value and by 2.084.15 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 1.031.07 fold lower compared
  to a critical value and by 1.612.77 fold lower
  compared to that of the analogue (Coating
  Siofarb)
• Under exposure of fire the coatings produce
  mainly water vapours.

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V.D.Glukhovsky Scientific Research Institute for
Binders and Materials Kiev National University
of Civil Engineering and ArchitectureVozdukhoflot
sky pr., 31 Kiev 03680 Ukraine email
pavlo.kryvenko_at_gmail.com