Evaluation of the performance of SBS/CR composite-modified deicing asphalt mixture prepared for ultra-thin wearing course

Zhilun Sun, Jian Chen, Shu Liu, Jingbang Qian, Rui Huang

Research output: Journal PublicationArticlepeer-review


Deicing agents may compromise the performance of asphalt mixture. This article aims to study the feasibility of using styrene-butadiene-styrene (SBS)/crumb rubber (CR) modifier to prepare a deicing asphalt mixture with satisfactory performance for ultra-thin wearing course. High/low-temperature performance, water stability and deicing-related performances of the asphalt mixture were evaluated by conducting a series of laboratory tests from micro to macro level considering different incorporation rates of anti-freezing agent and SBS/CR modifier. The results find that SBS/CR modification enhances the high and low-temperature properties of the binder, and optimal incorporation ratios are 2% and 16%, respectively. The addition of anti-freezing agents as the filling material improves the high-temperature performance of the mortar, but negatively affects low-temperature performance. For asphalt mixtures, anti-freezing agents can enhance high-temperature performance by up to 56%, with only a minor impact on anti-sliding properties. However, they harm the low-temperature performance and water stability. A recommended maximum replacement ratio of 80% achieves satisfactory results in dynamic stability (11,053 times/mm), flexural strength (8.41 MPa), tensile strain (3011.08E−6), Marshall stability (9.61 MPa), Marshall residual stability ratio (81.28%), and free-thaw splitting ratio (80.30%), meeting the engineering standards. An Anti-freezing agent replacement ratio from 20% to 100% correlates linearly with a snow-melting rate of 16.3%− 96.8% and a deicing rate of 9.4%− 57.0%. The conductivity of soaking solution has been identified as a valuable indicator for predicting the asphalt functionality. This research can provide valuable insights into the mixture design and facilitate the practical implementation of this innovative functional material.

Original languageEnglish
Article number135085
JournalConstruction and Building Materials
Publication statusPublished - 16 Feb 2024


  • Conductivity
  • Deicing asphalt mixture
  • SBS/CR modification
  • Snow-melting
  • Ultra-thin wearing course

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • General Materials Science


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