Effect of sulfur on engineering properties of polymer-modified asphalt

Jian Shiuh Chen, Han Chang Ho, Yuh Shin Chen, Wen Cheng Chang, Ching Yuan Hou

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Storage stability is the one of the most critical issues in polymer-modified asphalt. This study describes the effect of sulfur on the engineering properties of asphalt modified by styrene-butadiene-styrene (SBS). At low sulfur concentration, a continuous phase is present and the composite behaves like asphalt with moderately enhanced elastic response. Appearance of a dispersed structure usually begins at 3% to 5% sulfur. At high sulfur concentrations the compatibility of SBS-modified asphalt is enhanced. Micrographs obtained from a transmission electron microscope illustrate that the addition of sulfur significantly improves the storage stability of SBS-modified asphalt at high temperatures. In-situ chemical reactions resulting from sulfur could reduce SBS's coarseness and enhance solubility of the polymer in the asphalt. The rheological properties of SBS-modified asphalt depend strongly on the sulfur level. Increasing sulfur levels leads to an increase in the complex modulus ratio of SBS-modified asphalt to pure asphalt, and consequently the addition of sulfur improves on the mechanical behavior of SBS-modified asphalt. The sulfur reinforcement becomes pronounced at higher temperature. The engineering properties of polymer-modified asphalt are influenced by the behavior of individual component that forms the material.

Original languageEnglish
Title of host publication8th International Conference on Maintenance and Rehabilitation of Pavements, MAIREPAV 2016
PublisherResearch Publishing Services
Pages966-975
Number of pages10
ISBN (Electronic)9789811104497
DOIs
Publication statusPublished - 2016 Jan 1
Event8th International Conference on Maintenance and Rehabilitation of Pavements, MAIREPAV 2016 - Singapore, Singapore
Duration: 2016 Jul 272016 Jul 29

Publication series

Name8th International Conference on Maintenance and Rehabilitation of Pavements, MAIREPAV 2016

Other

Other8th International Conference on Maintenance and Rehabilitation of Pavements, MAIREPAV 2016
CountrySingapore
CitySingapore
Period16-07-2716-07-29

All Science Journal Classification (ASJC) codes

  • Building and Construction
  • Civil and Structural Engineering

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  • Cite this

    Chen, J. S., Ho, H. C., Chen, Y. S., Chang, W. C., & Hou, C. Y. (2016). Effect of sulfur on engineering properties of polymer-modified asphalt. In 8th International Conference on Maintenance and Rehabilitation of Pavements, MAIREPAV 2016 (pp. 966-975). (8th International Conference on Maintenance and Rehabilitation of Pavements, MAIREPAV 2016). Research Publishing Services. https://doi.org/10.3850/978-981-11-0449-7-197-cd