External treatments for the preventive repair of existing constructions: A review

M. Sánchez, P. Faria, L. Ferrara, E. Horszczaruk, H. M. Jonkers, A. Kwiecień, J. Mosa, A. Peled, A. S. Pereira, D. Snoeck, M. Stefanidou, T. Stryszewska, B. Zając

Research output: Contribution to journalReview articlepeer-review

71 Scopus citations


In the present paper different external surface treatments published in the literature as preventive solutions for improving the performance of existing concrete constructions are presented and discussed. They are categorized as repair materials for concrete conservation, protection surface methods against moisture and aggressive agent penetration, injection techniques for crack sealing and preventive repair solutions with smart functionalities. In a final section, the most extended testing methods for evaluating the effectiveness of the different repair solutions are summarized depending on the property to be enhanced: moisture control and resistance against penetration of aggressive agents. The review shows that although several possibilities exist for the repair of the existing constructions, there is a lack of comparative analysis between the different methodologies. SARCOS COST Action CA15202 stablishes as scientific objectives to carry out comparative studies including the most advanced solutions for the external repair of concrete, giving criteria for effectiveness assessment and defining robust and reliable methods for charactering the performance of the repaired structures.

Original languageEnglish
Pages (from-to)435-452
Number of pages18
JournalConstruction and Building Materials
StatePublished - 30 Dec 2018


  • Crack sealing
  • Damaged concrete
  • External surface methods
  • Preventive repair
  • Smart functionalities

ASJC Scopus subject areas

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


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