Evaluation of the Durability of Cement-based Repair Materials

Although concrete is often patched using cement-based repair materials, these materials can generate cracks and shelling which decrease concrete structure durability. This study investigates the properties of the interface between the concrete and polymer-modified cement mortar repair materials in order to improve the durability of concrete structures repaired by the aforementioned materials. Adhesive strength and water permeability tests were conducted. Results showed in the case of spray-on repair material, cracks often appeared at the interface between the concrete and between the construction layers of the repair material because of the difference in expansion and the shrinkage behavior. The progress of these cracks into the concrete was very small under test conditions. Resistance to water permeability was smaller along the interface between concrete and the repair material, while adhesive strength in the interface tended to improve as the material aged.

Language

  • English

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Filing Info

  • Accession Number: 01369875
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 15 2011 10:22PM