Stiffness modulus of reclaimed asphalt binder modified with local bio-rejuvenator in Indonesia (dynamic shear rheometer to van der poel nomograph test result)

Abstract

This study intends to examine the effect of using bio-rejuvenators (BioCS and BitutechRAP) on Reclaimed Asphalt (RA) binder as seen from the asphalt binder stiffness modulus (Sbit) based on laboratory testing using Dynamic Shear Rheometer (DSR) Frequency Sweep which is compared to Sbit resulting from analysis using Van der Poel nomograph under RTFO (rolling thin film oven) conditions. The comparison was analyzed by looking at the adjustment factor produced from each type of asphalt binder testing. The types of asphalt binders tested were pen 60/70 as control asphalt binder, 23% BioCS mixed in RAbinder, and 17% BitutechRAP mixed in RA binder. The results showed that the Sbit value from the DSR and Van der Poel test results was not too much different, with an adjustment factor of 1.61, the addition of BioCS to the RA binder was more influential than BitutechRAP, this was indicated by the adjustment factor of the BioCS + RA binder value of 2.84 which is close to the pen 60/70 adjustment factor value of 2.64.