Fire Propagation Performance of Intumescent Fire Protective Coatings Using Eggshells as a Novel Biofiller

Abstract EN

This paper aims to synthesize and characterize an effective intumescent fire protective coating that incorporates eggshell powder as a novel biofiller.

The performances of thermal stability, char formation, fire propagation, water resistance, and adhesion strength of coatings have been evaluated.

A few intumescent flame-retardant coatings based on these three ecofriendly fire retardant additives ammonium polyphosphate phase II, pentaerythritol and melamine mixed together with flame-retardant fillers, and acrylic binder have been prepared and designed for steel.

The fire performance of the coatings has conducted employing BS 476: Part 6-Fire propagation test.

The foam structures of the intumescent coatings have been observed using field emission scanning electron microscopy.

On exposure, the coated specimens’ B, C, and D had been certified to be Class 0 due to the fact that their fire propagation indexes were less than 12.

Incorporation of ecofriendly eggshell, biofiller into formulation D led to excellent performance in fire stopping (index value, ( I ) = 4.3 ) and antioxidation of intumescent coating.

The coating is also found to be quite effective in water repellency, uniform foam structure, and adhesion strength.