Abstract
This study seeks to address the effect of waste coal ash collected from burnt charcoal after human recreational activities to the chloroprene rubber’s dynamic property specifically in cyclic load. Waste coal ash was chosen due to their availability, low cost, and recyclability. The waste coal ash was incorporated into chloroprene rubber via melt compounding process using an internal mixer. The compounding formulation of the chloroprene rubber compound and coal ash were based on 100 phr of the chloroprene rubber. The loading of waste coal ash were varied at 5, 10, 20, 30 and 40 phr. Waste coal ash exhibits the highest reinforcing property at 40 phr loading. The fatigue test was done to determine the peak stress value and stress softening effect and found that at 5 – 30 phr waste coal ash had a detrimental effect on CR compound while at 40phr, the rubber compound exhibit positive result with an increase of 30% of the peak stress. Morphological study using scanning electron microscopy (SEM) showed degrees of agglomeration of the waste coal ash in the chloroprene rubber matrices. The dispersion of waste coal ash agglomerates and morphology of failures were in good agreement with the observed dynamic properties.
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