Scholars International Journal of Chemistry and Material Sciences (SIJCMS) | Volume-3-Issue-08
Original Research Article
Oct. 29, 2020
Improved Performance in Bitumen Properties through Modification with Sheared Polyethyline Waste
G. Aladekoyi, E. G. Olumayede
Page Numbers : 109-119
DOI : 10.36348/sijcms.2020.v03i08.001
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.
Original Research Article
Oct. 30, 2020
Proximate Composition and Antioxidant Activities of Different Species of Mangnifera indica Seeds Kernel Cultivated in Esan West Local Government Area of Edo State
Odia A, Irabor GE, Nweke CJ
Page Numbers : 120-127
DOI : 10.36348/sijcms.2020.v03i08.002
Antioxidant activities of some species of Mangnifera indica seed kernel (sucking mango, bush mango and opiororo mango) extracts were studied. The antioxidants capacities of the mango seed extracts were compared to some known synthetic antioxidant. Results obtained showed that the three different species of Mangnifera indica seed kernel which have 30.24+0.030%, 21.11+0.010% and 15.14+0.020% for sucking, bush and opiororo mangoes respectively had a lower scavenging capacity compared to the synthetic positive control standard (vitamin C) which recorded 32.57+0.001% in DPPH radical scavenging assay. Mangnifera indica specie B (bush mango) had the highest scavenging capacity (66.76+0.014%) compared to the synthetic positive control BHT (64.40+0.020%) in the reducing power determination assay. Mangnifera indica specie B (bush mango) and specie C (opiororo mango) had higher scavenging capacities of 14.64+0.031% and 14.29+0.019% for hydrogen peroxide scavenging capacity compared to synthetic sodium pyruvate which has 13.01+0.009%. Proximate composition of three varieties of mango seeds was also determined. The percentage moisture, ash crude fat, crude fibre, protein and carbohydrate contents was determined using A.O.A.C. method. Opiororo mango and Sucking mango had similar values for moisture content (8.00%) while Bush mango had comparable value of 8.05%. The ash content ranged between 0.40 - 1.80% and Bush mango had the highest value of 1.80±0.03%. The fat content was observed to be between 14.29±0.05% and 27.14±0.01% with sucking mango having the highest fat content (27.14±0.01%). Bush mango and Opiororo mango had similar values for crude fibre (49.50%) while sucking mango had comparable value of 49.00±0.03%. The crude protein ranged between 9.26 - 14.27%. This study suggests that the seeds may be nutritionally potent with appreciable high levels of nutrients and energy which can be incorporated into feed/food.