SIGNIFICANCE OF PROPERTY MISMATCH IN THE PATCH REPAIR OF STRUCTURAL CONCRETE. PART 3: REINFORCED CONCRETE MEMBERS IN FLEXURE

Approximately 500m pounds is spent in the UK each year on the repair of concrete members. In recent years researchers have been paying increasing attention to the structural implications of property mismatch between patch repair materials and the substrate reinforced concrete. Parts 1 and 2 of this study, published in 1990 (see IRRD nos 837600 and 837601), discussed the measurement of relevant mechanical and physical properties of repair systems and applied these results to the study of axial load transfer through simple patch repairs. This paper extends the approach to reinforced concrete beams repaired in either the flexural compression or tension zones and subjected to short-term static, long-term creep and cyclic loading. The research has shown that the performance of patch repaired reinforced concrete beams can be predicted from a knowledge of the basic physical and mechanical properties of the repair material and the substrate concrete. Given suitable repair materials and mode of application, satisfactory structural performance may be achieved in both the short and the long term. Repair materials found suitable were: epoxy mortar, acrylic (PMMA) mortar, SBR modified cementitious mortar; magnesium phosphate mortar, flowing concrete, and acrylic-modified cementitious mortar.

  • Availability:
  • Corporate Authors:

    Thomas Telford Limited

    London,   United Kingdom 
  • Authors:
    • EMBERSON, N K
    • MAYS, G C
  • Publication Date: 1996-3

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 45-57
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00725453
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Sep 26 1996 12:00AM