Sbs modified bitumen with organic layered double hydroxides: Compatibility and aging effects on rheological properties

Canlin Zhang, Hongjun Dong, Zhengli Yan, Meng Yu, Ting Wang, Shi Xu, Zhenliang Jiang, Changbin Hu

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

SBS-modified bitumen (SMB) is susceptible to aging, which seriously influences its service performance and life. In order to strengthen the anti-aging ability of SMB, triethoxyvinylsilane was designed to organically modify layered double hydroxides (LDHs) and was applied to modify SMB. The dispersibility and storage stability of LDHs in SMB were markedly enhanced after triethoxyvi-nylsilane organic modification, and the compatibility and storage stability of SBS in bitumen were simultaneously enhanced. Compared with SMB, the introduction of LDHs and organic LDHs (OLDHs) could ameliorate the high-temperature properties of SMB, and the thermostability of SBS in bitumen at a high temperature was also distinctly improved, especially OLDHs. After aging, due to the oxidation of molecular bitumen and the degradation of molecular SBS, SMB became hardened and brittle, and the rheological properties were significantly deteriorated, which had serious im-pacts on the performance of SMB. LDHs can mitigate the detriment of aging to bitumen and SBS, and the deterioration of the rheological properties of SMB is obviously alleviated. As a result of the better dispersibility and storage stability, OLDHs exerted superior reinforcement of the anti-aging ability of SMB.

Original languageEnglish
Article number4201
Number of pages12
JournalMaterials
Volume14
Issue number15
DOIs
Publication statusPublished - 2021

Keywords

  • Aging resistance
  • Layered double hydroxides
  • Organic modification
  • Rheological properties
  • SBS modified bitumen

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