POTENTIAL USE OF 'ENSET' FIBER ASH AS PARTIAL REPLACEMENT OF CONVENTIONAL FILLER MATERIAL IN HOT MIX ASPHALT

The main problems in road construction and maintance work Ethiopia availability of a large amount appropriate quality materials sites, aggregates different size fractions are not readily obtainable, necessitating their procurement from long distances, thereby causing an exorbitant increase costs. One the constructing asphalt paving mixture is obtaining sufficient filler material crushing fine rock low percent using ordinary Portland cement (OPC), hydrated lime (HL) marble dust. To overcome this problem, it important to come across alternative address gap naturally available material. Currently, renewed attention has been given use ‘waste’ instead conventional pavement construction. This research study investigates potential ‘Enset’ fiber ash as partial replacement hot mix supported by experimental laboratory investigation. In order achieve study, purposive sampling techniques were adopted select sample location. evaluated for design dense-graded referencing traditional control procedures based on standard specifications, crush was utilized comparison. Marshal Stability Rutting Test (RT) conducted determine HMA specimen's performance. Several specimens prepared aggregate blend according ASTM D 1559 with four percentages (EFA) 15%, 25%, 35% 45% total weight used mix. Specimens tests performed EN 12697-22 procedure-B rutting test. All properties taken at 4% air void determined optimum bitumen content (OBC). Almost same result observed 15% 25% replacement. However, higher Marshall Stability, lower filled asphalt, better flow, good mineral At rate, performance less than that but within specifications 2.78mm 2.9 mm depth 6mm satisfies 13108 requirement. As result, Enset can replace up study. It recommended ‘Enset' bituminous specificed percentage