Modified hydrotalcites as chloride scavengers and inhibitor release agents for improved corrosion protection of reinforced concrete

Zhengxian Yang, Rob Polder, Arjan Mol

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)
57 Downloads (Pure)

Abstract

Owing to the unique molecular structure and high ion exchange capacity, hydrotalcites are believed to have a potential to be modified and tailor-made as an active corrosion protective component of reinforced concrete. In this paper, two types of modified hydrotalcites (MHT-pAB and MHT-NO2) were tested both in alkaline solution and mortar for their possibilities as chloride scavengers and inhibitor release agents for application in concrete. The test in alkaline solution showed that ion exchange occurred between free chloride ions in solution and the intercalated inhibitive anions in the MHTs. The results in mortar validated that MHTs could be promising alternatives for preventing chloride-induced corrosion when an appropriate dosage is adopted and applied in a proper way, in particular, either incorporation of a certain amount (MHT-pAB to replace 5% weight of cement) in the bulk mortar or as a coating of the reinforcing steel (MHT-pAB or MHT-NO2 at 20% weight of cement).

Original languageEnglish
Pages (from-to)61-83
JournalHeron
Volume62
Issue number2
Publication statusPublished - 2017

Keywords

  • Chloride
  • Concrete
  • Corrosion
  • Inhibitors
  • Modified hydrotalcites

Fingerprint

Dive into the research topics of 'Modified hydrotalcites as chloride scavengers and inhibitor release agents for improved corrosion protection of reinforced concrete'. Together they form a unique fingerprint.

Cite this