Viscous properties of rubberized asphalt binders containing wax additive were evaluated through the
rotational viscometer at 135C and 120C. Rubberized binders were produced with three percentages
(10%, 15%, and 20% by the weight of binder), and then mixed with two commercial wax additives.
Three different periods of 30, 120, and 240 min were applied to the rotational viscosity test to evaluate
the viscous properties depending on testing time. The viscosity changes by different time periods were
drawn in time versus viscosity curve. From the results, it is concluded that (1) the addition of crumb rubber significantly increases the binder viscosity, (2) the wax additives are effective to reduce the binder
viscosities at both testing temperatures, (3) all the viscosity values of rubberized binders are observed
to increase after certain time, regardless of the addition of wax additives, (4) the higher the rubber contents, the steeper the viscosity change over time, and (5) the rubberized mixes with wax additive are
expected to have a better haul management, based on the less viscosity increase over time.
Viscous properties of rubberized asphalt binders containing wax additive were evaluated through therotational viscometer at 135C and 120C. Rubberized binders were produced with three percentages(10%, 15%, and 20% by the weight of binder), and then mixed with two commercial wax additives.Three different periods of 30, 120, and 240 min were applied to the rotational viscosity test to evaluatethe viscous properties depending on testing time. The viscosity changes by different time periods weredrawn in time versus viscosity curve. From the results, it is concluded that (1) the addition of crumb rubber significantly increases the binder viscosity, (2) the wax additives are effective to reduce the binderviscosities at both testing temperatures, (3) all the viscosity values of rubberized binders are observedto increase after certain time, regardless of the addition of wax additives, (4) the higher the rubber contents, the steeper the viscosity change over time, and (5) the rubberized mixes with wax additive areexpected to have a better haul management, based on the less viscosity increase over time.
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