Advances in Materials Science and Engineering / 2020 / Article / Tab 2

Research Article

Evaluating the Physical and Rheological Properties of Rejuvenated Styrene-Butadiene-Styrene-Modified Asphalt Binders

Table 2

The principal properties of rejuvenators Types I, II, and III.

PropertiesMethodsRejuvenators
Type IType IIType III

Test on emulsions
Viscosity at 25°C (SFS)ASTM D749625∼15020∼6025∼150
Residue (%)ASTM D6934>6460∼65>64
Miscibility testASTM D6999NonseparationNonseparationNonseparation
Sieve test (%)ASTM D6933<0.1<0.1<0.1
Particle charge testASTM D7402PositivePositivePositive
Cement mixing test (%)ASTM D6935<2<2<2
Pumping stability1PassPassPass
Tests on residue from distillation test
Viscosity at 60°C (cSt)ASTM D21701000∼4000200∼5001000∼4000
Asphaltenes (%)ASTM D2007<11.22∼4<11
Maltene distribution ratio (PC + A1)/(S + A2)2ASTM D20070.8∼1.50.5∼0.90.7∼1.1
PC/S ratio2ASTM D2007>1.2>1.2>0.5

Note: 1: pumping stability is tested by pumping 475 mL of rejuvenators, diluted one part concentrate to one part water, at 25°C, through a 6 mm gear pump operating 1750 rpm for 10 minutes with no significant separation or coagulation. 2: PC is a polar compound; A1 is the first acidaffins; A2 is the second acidaffins; S is the saturated hydrocarbons.

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