In this study, fly ash (FA) and multiwalled carbon nanotubes (MWCNTs) were used to make environmentally friendly\nnanocomposites, which have high fire retardant properties and high mechanical properties. Industrial waste such as fly ash has\nbecome a major concern during the treatment of environmental pollution.MWCNTs were used in this experiment to enhance the\nflame retardant properties and mechanical properties of materials with fly ash additives. MWCNTs content (0.03, 0.04, and 0.05\nwt.%) and fly ash content (30, 40, and 50 wt.%) were studied for three different levels. The flame retardancy of the material is\nsignificantly improved by the addition of fly ash/MWCNTs at different rates, especially at 0.04 wt.%MWCNTs and 40 wt.%fly ash\nwith LOI at 26.8%. Regarding mechanical properties, tensile strength increases as fly ash/MWCNTs increase, up to a critical point.\nOn the other hand, the compressive strength of composite increases continuously as fly ash/MWCNTs increase. Scanning electron\nmicroscopy (SEM) was used to observe the morphology of fly ash and MWCNTs as well as its distribution in the matrix. This will\nhelp analyze the influence of the effectiveness of the combination of fly ash and MWCNTs to the flame retardancy and mechanical\nproperties of fly ash/MWCNTs/epoxy nanocomposites.
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