Abstract
The utilisation of rice husk ash (RHA) as an aluminosilicate source in fire-resistant coating could reduce environmental pollution and can turn agricultural waste into industrial wealth. The overall objective of this research is to develop a rice-husk-ash-based geopolymer binder (GB) fire-retardant additive (FR) for alkyd paint. Response surface methodology (RSM) was used to design the experiments work, on the ratio of RHA-based GB to alkyd paint. The microstructure behaviour and material characterisation of the coating samples were studied through SEM analysis. The optimal RHA-based GB FR additive was formulated at 50% wt. FR and 82.628% wt. paint. This formulation showed the result of 270 s to reach 200 °C and 276 °C temperature at equilibrium for thermal properties. Furthermore, it was observed that the increased contents of RHA showed an increment in terms of the total and open porosities and rough surfaces, in which the number of pores on the coating surface plays an important role in the formation of the intumescent char layer. By developing the optimum RHA-based GB to paint formulation, the coating may potentially improve building fire safety through passive fire protection.
Highlights
IntroductionMaterials’ flammability is one of the most important elements that require strict measures and precautions necessary to maintain fire safety, especially for building and construction products
Two factors are chosen; namely, the rice husk ash (RHA)-based geopolymer, which acts as a fire retardant (FR), and paint, designated as A and B, respectively
The results indicated that the 50.0% weight of the fireretardant additive (FR) addition contributed significantly to better fire protection efficiency due to the formation of the char layer, which affects the equilibrium temperature
Summary
Materials’ flammability is one of the most important elements that require strict measures and precautions necessary to maintain fire safety, especially for building and construction products This is due to the growing loss of life because of the spread of fire. In order to overcome this consequence, various measuring techniques of fire properties have been developed and improved, such as lowering the heat release, controlling ignitability, or improving the extent of flame spread across the surface of flammable materials. These factors allow a greater time for people to evacuate to safe areas before a fire takes hold and saves more lives. 7.53 per million populations each year is the rate of fire victims with 3.07 deaths per million populations
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