Effect of linear low density-polyethylene grafted with maleic anhydride (LLDPE-g-MAH) on properties of high density-polyethylene/styrene–butadiene–styrene (HDPE/SBS) modified asphalt

Published Date
Construction and Building Materials
October 2013, Vol.47:192–198, doi:10.1016/j.conbuildmat.2013.04.047

• Author 

• Haiyan Zhang
• Xiaowei Wu
• Dongwei Cao ^,
• Yanjun Zhang
• Min He

• Research Institute of Highway Ministry of Transport, Beijing 100088, People’s Republic of China

Received 16 January 2013. Revised 15 April 2013. Accepted 26 April 2013. Available online 2 June 2013. 

Highlights

• •
  A kind of asphalt modifier was prepared by melt blending.
• •
  The low-temperature performance of HDPE/SBS modified asphalt was improved.
• •
  Softening points difference between the top and bottom sections of samples were sharply reduced.
• •
  LLDPE-g-MAH had no significant effect on high-temperature property and rheological character.

Abstract

A kind of modifier composed of high density-polyethylene (HDPE) and styrene–butadiene–styrene (SBS) was prepared by melt blending with different contents of linear low density-polyethylene grafted with maleic anhydride (LLDPE-g-MAH). HDPE/SBS modified asphalt composites were prepared. Effects of LLDPE-g-MAH on classical performance, hot storage stability, and dynamic rheological behaviors of HDPE/SBS modified asphalt were investigated. Compared with samples without LLDPE-g-MAH, penetration and ductility of HDPE/SBS modified asphalt were both increased, in the meantime, softening point and the maximum failure temperature were decreased. The research results showed that low-temperature performance was improved, while LLDPE-MAH had no positive effect on high-temperature property. In addition, softening point difference between the top and bottom sections of samples was sharply reduced. A fairly homogeneous dispersion system of the modifiers in the asphalt matrix was observed by microscope. A conclusion that LLDPE-g-MAH had no significant effect on high-temperature property and rheological character can be drawn from the rheological studies.

Keywords

High density-polyethylene (HDPE)

Linear low density-polyethylene grafted with maleic anhydride (LLDPE-g-MAH)

Modified asphalt

Properties

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• ⁎ 
  Corresponding author.
  
  

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