The bond between geopolymer repair mortars and OPC concrete substrate: Strength and microscopic interactions

Yan Shuai Wang, Kai Di Peng, Yazan Alrefaei, Jian Guo Dai

Research output: Journal article publicationJournal articleAcademic researchpeer-review

10 Citations (Scopus)


Geopolymer binders have good potential in the repair of existing concrete structures due to their superior durability and mechanical performances. Understanding the interfacial transition zone (ITZ) between geopolymer mortars and ordinary Portland cement concrete is a crucial step to implement such an environmentally-friendly technology. This paper focuses on the failure modes of the bond interface and the microscopic and chemical interactions between various geopolymer mortars and concrete substrates at ITZs. The occurrence of newly-formed gels and second hydration mechanisms at ITZs are analyzed and discussed.

Original languageEnglish
Article number103991
JournalCement and Concrete Composites
Publication statusPublished - May 2021


  • Alkali-activated binders
  • Bond strength
  • Interfacial transition zone (ITZ)
  • Strengthening

ASJC Scopus subject areas

  • Building and Construction
  • Materials Science(all)

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