Abstract
Most of the pavement structures, worldwide, are made with Hot Mix Asphalt (HMA) as this is one of the most economical materials available and it is also very suitable for different climatic conditions. However, the HMA pavement normally requires frequent maintenance and rehabilitation due to damages caused by excessive traffic loading. Therefore, one of the alternatives to minimize the damage of pavement and to prolong its service life is to use modifiers that are used in the asphalt pavements. This study demonstrates the properties of HMA mixed with coir fiber. The laboratory results reveal that coir fiber is effective in increasing the Marshall stability of ordinary HMA mixes. The coir fiber increases the Marshall stability of ordinary HMA by 41%. Consequently, coir fiber has promising potential in modifying asphalt mixtures. Additionally, comprehensive statistical analysis was carried out to validate conclusions drawn based on laboratory results. It was clearly concluded, statistically, that changing the Coir Fiber Content (CFC) has a significant effect on almost all Marshall test values.