ACCELERATED AGING DEGRADATION OF GLASS FIBER COMPOSITES

The objective of this research investigation was to determine the effect of accelerated alkaline corrosion (aging) on the strength characteristics of E-glass/vinylester composites. Pullout tests were performed on the composite both before aging and after aging to determine the effect of alkalies on the composite. Tensile testing of unaged specimens was also performed to provide a maximum unaged tensile strength. Deliberately notched specimens were cast into concrete blocks and subjected to tensile loads up to failure via a pullout test. Additional test specimens with similar notch patterns were tested by applying tensile loads through a gripping assembly. Aging was accomplished by immersing the specimens in a highly alkaline bath (pH approximately equal to 12) and by elevating the temperature of the bath to approximately 60 degrees C (140 degrees F) to accelerate the aging effects. A water bath at similar temperatures was used to aid in isolating the effects of the alkalies on the composite's strength characteristics. All of the specimens were in an unloaded state of stress during the aging. Results of the aging tests were normalized and compared to unaged specimens. Reasonably expected elastic limits, reasonably expected maximum loads and peak loads were determined and compared for the pullout test specimens. Peak loads were collected and compared for the unaged tensile test specimens.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/189074302X
• Corporate Authors:

  University of Arizona, Tucson

  Drachman Institute, 819 E First Street
  Tucson, AZ  United States  85721

  University of Arizona, Tucson

  Department of Civil Engineering and Engineering Mechanics
  1209 E 2nd Street
  Tucson, AZ  United States  85721-0072

  University of Arizona, Tucson

  Transportation and Traffic Institute
  Tucson, AZ  United States  85721
• Authors:
  • Porter, M L
  • Barnes, B A
• Conference:
  • Second International Conference on Composites in Infrastructure
  • Location: Tucson, Arizona
  • Date: 1998-1-5 to 1998-1-7
• Publication Date: 1998-1

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 446-459
• Serial:
  • Volume: 2

Subject/Index Terms

• TRT Terms: Accelerated tests; Aging (Materials); Alkali; Corrosion; Fiber composites; Glass fibers; High temperature; Pull out test; Strength of materials; Tensile strength
• Uncontrolled Terms: Degradation (Materials)
• Subject Areas: Geotechnology; Highways; Materials; I35: Miscellaneous Materials;

Filing Info

• Accession Number: 00764834
• Record Type: Publication
• ISBN: 189074302X
• Files: TRIS
• Created Date: Jun 3 1999 12:00AM