performance optimization in bitumen properties from different sources modified with shredded tier waste

Background and objectives: optimization of bitumen with polymer modification such as a shredded tier, which serves as a waste in the environment has been used for road pavement to minimize common failure mechanisms associated with roads. the objectives aimed at using a shredded tier to modified bitumen (stmb) in ratio10:90, 20:80, 30:70, 40: 60, and 50:50, from shredded tier were added to bitumen from agbabu and loda to study their performances when applied in the construction industry.methods: bitumen, which was obtained from odigbo and irele local government area of ondo state, nigeria, was mixed at 3000c for two hours at different proportion with a shredded tier. characteristics such as penetration, viscosity, melting point, marshal stability, specific gravity and mechanical properties were determined.findings: marshall stability (kg) at 600c increased with an increase in shredded tier modified bitumen from10% to 40% improved performance in both modifications and reduced in a 50% increase. this indicated that the increased in shredded tier reduced the measured value of penetration after the attainment values of 40:60 blends. this interaction between the bitumen-tier blends has a penetration value adequately agreed with the predicted value by the penetration index model. the rheological properties from different proportions at temperatures ranging from 450c to 650c at 40% modification were observed to have the least rutting parameter at 3.9 (g*/sin δ (kpa) in agbabu and 2.91(g*/sin δ (kpa) in loda for defects accountable to paving deformation and ageing as there was a decrease in the rutting parameter with the increase in temperature generally.conclusion: generally, the values obtained for the physico-mechanical properties increased with an increase in modifiers from 10% to 40% modification in the two samples. though, agbabu is preferable and economical due to the percentage yield for road construction.