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 03 680 Ukraine

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Intumescent fire protection coating based geocement

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]


FIRE SAFETY CRITERIA

  • BURNING (BURNING RATE)

  • COMBUSTIBILITY

  • HEAT PRODUCTION

  • RESISTANCE TO OPEN FLAME

  • FIRE SPREAD OVER SURFACE

  • SMOKE PRODUCTION

  • TOXICITY OF COMBUSTION PRODUCTS


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


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


Outcome
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


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)


Constituent materials and test methods
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


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


CONSTITUENT MATERIALS AND TEST METHODS

COATING COMPOSITIONS UNDER STUDY


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


Results
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


Results1

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


Results2
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)


Results3
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)


Results4
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)


Results5
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).


Conclusions
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.


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: [email protected]


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