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Thursday, 09 July 2020
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Raw materials & technologies, Technologies

Intumescent coatings based on alkali-activated borosilicate inorganic polymers

Friday, 29 May 2020

A new paper presents results regarding the possibility of using intumescent alkali-activated borosilicate inorganic polymers (AABSIP) as passive fire protection for various substrates.

The possibility of using intumescent alkali-activated borosilicate inorganic polymers as passive fire protection has been investigated. Image source: Dreadlock - stock.adobe.com (symbol image).
The possibility of using intumescent alkali-activated borosilicate inorganic polymers as passive fire protection has been investigated. Image sourc...

The intumescent AABSIP were obtained by alkali activation of waste glass powder with mixtures of NaOH, KOH, and borax.

In order to verify the fire behavior, four types of AABSIP intumescent coatings were applied on metal plates and commercial plasterboard and tested in direct contact with a propane flame.

Temperature kept below 500°C

The presence of intumescent AABSIP coatings on the metal plates kept the temperature below 500°C (measured on the opposite face where the propane flame was applied); this temperature was critical for the structural strength of steel.

AABSIP coating decreased the propagation rate of plasterboard substrate degradation as well as the thermal transfer through the plaster substrate.

The study has been publidhed in Journal of Coatings Technology and Research volume 17 (2020).

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