STRESSES IN EPOXY COMPOUNDS FOR PORTLAND CEMENT CONCRETE

THIS PAPER IS CONCERNED WITH A STUDY OF STRESSES IN EPOXY COMPOUNDS INDUCED BY CURING AND THERMAL SHRINKAGE, AND THEIR RELATIVE EFFECT ON EPOXY OVERLAYS AND REPAIRS TO PORTLAND CEMENT CONCRETE. THE STUDY SHOWS THAT THE PRINCIPAL CAUSE OF DISTRESS IN EPOXY OVERLAYS AND LAMINATES RESULTS FROM AUTOGENOUS (CURING) SHRINKAGE, SINCE THERE IS SUFFICIENT ELONGATION IN EPOXY COMPOUNDS, DESIGNED FOR USE WITH PORTLAND CEMENT CONCRETE TO ACCOMMODATE STRESS THAT RESULTS FROM THE DIFFERENCE IN THE COEFFICIENT OF THERMAL EXPANSION OF THE EPOXY COMPOUND AND THAT OF PORTLAND CEMENT CONCRETE. IT ALSO SHOWS THAT AUTOGENOUS (CURING) SHRINKAGE CAN BE KEPT WITHIN ACCEPTABLE LIMITS. IT IS THE INTENT TO EMPHASIZE THAT, WHILE TESTS PRESENTLY IN USE FOR EPOXY COMPOUNDS FOR PORTLAND CEMENT CONCRETE MAY ADEQUATELY DEFINE THE PROPERTIES OF THE EPOXY COMPOUND, THEY DO NOT NECESSARILY PREDICT FUNCTION IN THE EPOXY COMPOUND AND PORTLAND CEMENT CONCRETE ENTITY. RESEARCH BASED CONCEPT OF ENTITY SHOULD LEAD TO ACCEPTANCE TESTS WHICH PREDICT THE SERVICE LIFE OF AN EPOXY COMPOUND REPAIR OF PORTLAND CEMENT CONCRETE. ONE SUCH TEST IS INCLUDED IN AN ADENDUM. /ACIJP/

• Supplemental Notes:
  • Sp 21, pp 93-106, 6 FIG
• Corporate Authors:

  American Concrete Institute (ACI)

  38800 Country Club Drive
  Farmington Hills, MI  United States  48331
• Authors:
  • Whitesides, G W
• Publication Date: 1968

Subject/Index Terms

• TRT Terms: Concrete curing; Epoxy resins; Overlays (Pavements); Portland cement concrete; Repairing; Service life; Shrinkage; Stresses; Thermal expansion
• Uncontrolled Terms: Repairs
• Subject Areas: Design; Geotechnology; Highways; Maintenance and Preservation; Materials;

Filing Info

• Accession Number: 00216773
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 15 1994 12:00AM