Abstract
This research deals with contribution of hybrid fillers with palm oil clinker (POC) as a novel bio-filler in solvent-borne intumescent fire protective coating for steel. The hybrid fillers with POC were mixed in appropriate amount of additives and acrylic binder to produce the intumescent coatings. The intumescent coatings were characterized by using Bunsen burner test, surface spread of flame, thermogravimetric analysis, field emission scanning electron microscopy, static immersion and Instron micro tester equipment. Specimen with POC as a single filler has significantly enhanced the fire protection performances of the intumescent coating due to the high thermal stability of POC, where less than 10% of temperature different when compared to specimens with hybrid fillers. From the flame spread classification, class 1 is the best classification while Class 4 is the worst and considered high risk. All specimens was classified as class 1 since the final spread of flame was less than 165 mm. For hybrid fillers composition, specimen consist of POC/Al(OH)3/TiO2 has significantly improved the water resistance of the coating due to the low solubility of Al(OH)3 in water, while specimen contain of Mg(OH)2 had higher mechanical strength due to the strong bonding between the metal surface and acrylic binder/Mg(OH)2 filler. It was found that coating with the incorporation of all hybrid fillers gives excellent fire protection performance with good thermal stability, water resistance and mechanical properties. It can be concluded that, the selection of appropriate composition of fillers and binder in intumescent coating was highly influence the intumescent coating performance.
Highlights
Steel starts to lose its strength and stiffness when temperature reached 550oC in fire incident, where collapse of steel structures may occur [1,2]
The results show that the percentage different between specimen contain palm oil clinker (POC) as single filler and specimens with hybrid fillers is less than 6%, indicate that POC alone significantly enhanced thermal stability of the intumescent coating
Specimen SBPM containing POC/Mg(OH)2 had 5% increase in residual weight which contribute to a better thermal stability compared to specimen SBPA containing POC/Al(OH)3, which specifies that incorporation of Mg(OH)2 significantly increased the thermal stability of the intumescent coating than Al(OH)3
Summary
Steel starts to lose its strength and stiffness when temperature reached 550oC in fire incident, where collapse of steel structures may occur [1,2]. Intumescent fire retardant coatings was used as passive fire protection materials to protect the steel structures from collapse when exposed to high temperature [3]. These inorganic fillers decompose endothermically and absorb energy and release non-flammable molecules such as H2O and/or CO2, which dilute combustible gases, and promote the char formation of a protective ceramic or vitreous layer [6]. This inorganic filler is expensive and will increase the production cost of intumescent coatings
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
