Elastomers and Composites

The Rubber Society of Korea (한국고무학회)
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Emulsification of Asphalt Modified with Styrene Butadiene Rubber (SBR) and Styrene Butadiene Styrene (SBS); 1) Phase Stability Behavior and 2) Physical Properties

  • Lee, Eun-Kyoung (Department of Pharmaceutical & Biomedical Engineering, Cheongju University)
  • Received : 2019.11.06
  • Accepted : 2019.11.29
  • Published : 2019.12.31
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Abstract

In this work, styrene butadiene rubber (SBR) and styrene butadiene styrene (SBS) were used to modify asphalt, resulting in SBR- and SBS-modified asphalt, respectively. The two modified asphalts were emulsified with a nonionic emulsifier (Span 60) and cationic emulsifiers (ID, DDA) and their phase stabilization was investigated via particle size, Zeta potential, and flow behavior analysis. With increasing amount of the mixed emulsifier, the particle size decreased, leading to an increase in viscosity. The shear thinning behaviors and Zeta potential values ranging from 35-65 mV were determined and remained considerably stable. In addition, the adhesion strength and compression strength of the SBR-and SBS-modified asphalt emulsion were evaluated via surface free energy examination. The remarkable adhesion and compression strengths were estimated when 5 phr ID and 6 phr DDA were added to the emulsified asphalt modified with SBR and SBS. Therefore ID and DDA, the two cationic surfactants, played significant roles in improving the dispersion and interfacial adhesion strength, resulting in the improved adhesion and compression strength of the emulsified asphalts modified with SBR and SBS.

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References

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