Fire resistance performance of composite coating with geopolymer‐based bio‐fillers for lightweight panel application

• Published in: Journal of applied polymer science Vol. 137; no. 47
• Main Authors: Abdul Rashid, Muhammad Khairi, Ramli Sulong, Nor Hafizah, Alengaram, Ubagaram Johnson
• Format: Journal Article
• Language: English
• Published: Hoboken, USA John Wiley & Sons, Inc 15.12.2020; Wiley Subscription Services, Inc
• Subjects: Aluminous cements; applications, coatings, flame retardance, thermal properties; Calcium aluminate; Cement; Clinker; Fillers; Fire resistance; Materials science; Melting points; Metakaolin; Morphology; Palm oil; Polymers; Portland cements; Substrates; Surface stability; Thermal conductivity; Thermal resistance; Thermal stability
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.49558

Structural insulated panel (SIP) requires fire‐resistant coating due to its substrate having low melting point. This article presents the effect of filler and binder on fire resistance, thermal stability, and surface morphology of composite coating. Palm oil clinker filler‐type coatings made using ordinary Portland cement (OPC:POC), calcium aluminate cement (CAC:POC), and alkali‐activated geopolymer (GP:POC) binders were analyzed. GP:POC was then compared to other geopolymer‐binder type coating with different fillers such as rice husk ash (GP:RHA), metakaolin (GP:MK), and hybrid filler of POC and RHA (GP:POC‐RHA). It was found that geopolymer binder‐type specimens have better fire‐resistance due to low thermal conductivity caused by their porous microstructure and intumescence behavior. Then, the coating formulation was optimized in terms of thickness, alkaline activator ratio and curing regime which produced GP:RHA' that lasted almost 2 hours during flame exposure test. This article concludes that geopolymer‐binder type composite is a plausible fire‐resistant coating for SIP.