Optimizing Co-blends of Crumb Rubber and Ethylene Vinyl Acetate in 70/100 Bitumen
|Title||Optimizing Co-blends of Crumb Rubber and Ethylene Vinyl Acetate in 70/100 Bitumen|
Name: Keith Nare
Org: PhD Candidate, Center for Rubber Science and Technology, Nelson Mandela University, University Way, Port Elizabeth, 6019, South Africa.
Name: Shanganyane Percy Hlangothi
Org: Doctor, Center for Rubber Science and Technology, Nelson Mandela University, University Way, Port Elizabeth, 6019, South Africa.
|Contact Author||Author #1|
Alt Email: email@example.com
|Keywords||70/100 bitumen, Co-blend, Crumb rubber, Ethylene vinyl acetate, Response surface methodology|
|Abstract||Formulation of modified bitumen co-blends presents challenges associated with contributions of individual and interaction effects to thermo-rheological properties. Crumb rubber and ethylene vinyl acetate were used to study the optimization of co-blends in 70/100 bitumen and compared to industrial standards. A laboratory mixer fitted
with a dual helical impeller was used to perform the mixing after which dynamic shear rheometer was utilized to characterize the bituminous binders. The results showed that phase angle decreases with co-blend proportions, whereas the rutting parameter and complex shear modulus increase. Response surface methodology can be used to optimize formulations for modification of 70/100 bitumen.
• str. dyn.
• wat. Res.