STRUCTURAL REPAIR OF CONCRETE USING CEMENT BASED MORTARS AND RENDERS

The paper suggests that repairs have to be appropriate to the identified cause of deterioration. It considers the various causes of deterioration, water penetration through permeable concrete, carbonation reducing the alkaline protective environment to steel, chloride penetration and pitting corrosion. It defines ways of assessing the degree or probability of corrosion in rebars using visual tests, permeability tests, carbonation identification, and chloride content and cover to rebar. The properties desired of repair mortars are identified in terms of thermal and expansion coefficients bond and compressive strengths and permeability. Different types of mortars are then discussed and evaluated including PVA, SBR and acrylic polymers, prepacked proprietary mortars and high flow grouts. Three case histories of cementitious repair work and one of a resin mortar repair are then given. (Author/TRRL)

• Supplemental Notes:
  • Paper presented at the Concrete Institute of Australia 12th Biennial Conference, Melbourne, 1985.
• Corporate Authors:

  CONCRETE INSTITUTE OF AUSTRALIA

  PO BOX 848
  SYDNEY, NEW SOUTH WALES  Australia  1585
• Authors:
  • Robb, A D
• Publication Date: 1985

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: 18 p.

Subject/Index Terms

• TRT Terms: Bonds; Carbonation; Cement mortars; Chlorides; Compressive strength; Concrete; Concrete structures; Corrosion; Deterioration; Expansion; Permeability; Pitting; Reinforcing bars; Repairing; Surveying; Testing; Thermal stresses
• Uncontrolled Terms: Deteriorated concrete; Rebars; Repairs; Thermal response; Visual surveys
• Old TRIS Terms: Expansion, construction phenomena
• Subject Areas: Highways; Maintenance and Preservation; Materials;

Filing Info

• Accession Number: 00462538
• Record Type: Publication
• Source Agency: ARRB
• Files: ITRD, TRIS, ATRI
• Created Date: Feb 28 1987 12:00AM