REINFORCED CONCRETE REPAIRS IN BEAMS

The effectiveness of reinforced concrete repairs may be established in terms of their ability to restore the structural integrity of the reinforced concrete element and to protect the reinforcement from severe weathering conditions. Therefore, 18 large scale reinforced concrete beams were cast and subject to an accelerated corrosion mechanism in a chloride environment. The beams were repaired using two different materials for comparison purposes, namely an OPC mortar and a free flowing micro-concrete. Twelve beams were tested just after the repair material has cured, and the remaining beams were subjected to an aggressive weathering cycle for 6 months after which structural and electrochemical testing were conducted. This paper presents the results of both structural load testing of all beams, and physical and electrochemical performance of repaired beams before and during the accelerated weathering. The results of structural testing showed that in short-term situations both materials behaved very similar to each other and were able to restore 60-70% of the beams' capacity. But in long-term situations the OPC mortar beams have deteriorated badly showing extensive cracking, while the free flowing micro concrete beams have shown very little cracking. (A)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09500618
• Corporate Authors:

  Elsevier

  The Boulevard, Langford Lane
  Kidlington, Oxford  United Kingdom  OX5 1GB
• Authors:
  • NOUNU, G
  • CHAUDHARY, Z-UL-H
• Publication Date: 1999

Language

• English

Media Info

• Features: References;
• Pagination: p. 195-212
• Serial:
  • Construction and Building Materials
  • Volume: 13
  • Issue Number: 4
  • Publisher: Elsevier
  • ISSN: 0950-0618
  • Serial URL: http://www.sciencedirect.com/science/journal/09500618?sdc=1

Subject/Index Terms

• TRT Terms: Beams; Reinforced concrete; Repairing; Weather resistance
• ITRD Terms: 3472: Beam; 4794: Reinforced concrete; 3635: Repair; 5940: Weather resistance
• Subject Areas: Maintenance and Preservation;

Filing Info

• Accession Number: 00771585
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD
• Created Date: Nov 4 1999 12:00AM