LONG TERM AND THERMAL COMPATIBILITY OF EPOXY RESINS, CONCRETE AND STEEL

The incompatibilities between epoxy materials and the materials they are used to bond arise from the following time and temperature related properties: (a) curing shrinkage of epoxy resins relative to shrinkage of concrete; (b) high differential thermal movement between epoxy and steel and concrete; (c) creep and relaxation of epoxies in relation to that of concrete and the worsening of creep and relaxation properties of epoxies in relation to temperature; (d) in certain instances, fatigue resistance of epoxies. The structural effects of these incompatibilities are discussed for the following applications: epoxy mortar bridge nosing, repair of new and old concrete by injection or patching, strengthening of new and old structures by bonding-on additional reinforcement, bonding together precast concrete elements, epoxy grouted anchorages, rock bolts etc. The shaw test for testing the ability of an epoxy to relieve differential shrinkage and thermal expansion by creep is described. As the physical properties of epoxies can, within limits, be 'tailored' by the chemist to meet a wide range of requirements, it is important that the engineer knows what properties he requires for his particular application and that time and temperature characteristics are taken into account in design. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03799824
• Corporate Authors:

  Concrete Society of Southern Africa

  Portland Park, P.O. Box 168
  Halfway House,   South Africa 
• Authors:
  • BLIGHT, G E
• Publication Date: 1980-12

Media Info

• Features: Figures; Photos; References;
• Pagination: p. 7-13
• Serial:
  • CONCRETE BETON
  • Volume: 20
  • Publisher: Concrete Society of Southern Africa
  • ISSN: 0379-9824

Subject/Index Terms

• TRT Terms: Adhesion; Bridge decks; Bridges; Concrete; Creep; Epoxy resins; Fatigue (Mechanics); Grout; Mechanical relaxation; Properties of materials; Repairing; Shrinkage; Steel; Structures; Temperature; Test procedures; Thermal expansion; Time; Time duration
• Uncontrolled Terms: Compatibility; Injection (Materials); Long term; Repairs
• ITRD Terms: 5942: Adhesion; 3455: Bridge; 4755: Concrete; 4732: Creep (mater); 3355: Engineering structure; 7468: Epoxy resin; 5579: Fatigue (mater); 4729: Grout; 3617: Injection (mater); 5925: Properties; 3635: Repair; 4743: Shrinkage; 4542: Steel; 6722: Temperature; 6288: Test method; 5414: Time
• Subject Areas: Bridges and other structures; Geotechnology; Highways; Materials; I35: Miscellaneous Materials;

Filing Info

• Accession Number: 00349573
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Jul 30 1982 12:00AM