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Scholars International Journal of Chemistry and Material Sciences (SIJCMS)
Volume-3 | Issue-08 | 109-119
Original Research Article
Improved Performance in Bitumen Properties through Modification with Sheared Polyethyline Waste
G. Aladekoyi, E. G. Olumayede
Published : Oct. 29, 2020
DOI : 10.36348/sijcms.2020.v03i08.001
Abstract
Polymer modification of bitumen to decrease bitumen pavement susceptibility to high and low temperatures, allowing reduction in common failure mechanisms as rutting and cracking has been in existence since decade. The objectives was to study the mechanical and rheological properties of properties of extracted base bitumen from Agbabu and Loda and bitumen–polymer (polyethylene) blend from the two sources and helped to understand possible conversion of the non-degradable waste into useful product. 200grams of sheared waste polyethylene sachet were mixed in ratio 10:90, 20:80, 30:70, 40:60 and 50:50 to extracted bitumen sample from both Agbabu and loda using mechanical mixer Heidolph model RZR 2020. These were heated in a thermosetting oven at 3000C for two hours for good modification. The results obtained indicated that Agbabu bitumen had good yield (79.90±0.01) when compared with Loda (46.50±0.01) after extraction. Other physico-mechanical properties of sheared Polyethylene Modified Bitumen (SPMB) indicated that bitumen base from Agbabu is efficient and economical for road pavement. The results obtained from SPMB from Agbabu and Loda were; Penetration at 250C increased from ratio 10:90 to 40:60 in both samples (47.50±0.20 -57.35 ±0.10) and (46.20±0.20 -52.15 ±0.20) before retreating. Marshall Stability (kg) at 600C also increased with increase in sheared polyethylene modified bitumen from10% to 40% increase in both modifications and diminished in 50% increase. Generally the values obtained for the physico-mechanical properties increased with increase in modifiers from 10% to 40% modification in the two samples, but good performance was noted in Agbabu modification than Loda for sheared polyethylene bitumen. The rheological properties from different proportions of modification at temperature ranges from 450C to 650C indicated that SPMB at 40% modification is encouraged for better performance because these blends will exhibit greater stiffness at higher temperature and high flexibility at low temperatures.
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