A preliminary study of reactive powder concrete as a new repair material

Ming Gin Lee, Yung Chih Wang, Chui Te Chiu

Research output: Contribution to journalArticlepeer-review

168 Scopus citations

Abstract

This study aims to use reactive powder concrete (RPC) as a new repair material and evaluate its bond durability to existing concrete. One accelerated aging environment, namely a freeze-thaw cycle acceleration deterioration test, was selected for the evaluation of bond durability of the repair materials. Before and after aging, the samples were evaluated by the compressive strength, bond strength (slant shear test), steel pull out strength, and relative dynamic modulus NDT tests. The test results show that the RPC displays excellent repair and retrofit potentials on compressive and flexure strengthening and possesses high bond strength, dynamic modulus and bond durability as compared with other concretes. The adhesion between the RPC and the steel is also much greater than that for the other concretes. It would be interesting to verify the consequences of this improved adhesion and repair in reinforced concrete structures.

Original languageEnglish
Pages (from-to)182-189
Number of pages8
JournalConstruction and Building Materials
Volume21
Issue number1
DOIs
StatePublished - Jan 2007

Keywords

  • Bond strength
  • Freeze-thaw
  • Reactive powder concrete
  • Repair material
  • Retrofit

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