Effect of Epoxy Impregnation on the Moe and Mor of Intact and Failed Yellow-Poplar (<i>Liriodendron Tulipifera</i> L.) Sapwood Beams

Authors

  • Gregory R. Moore
  • L. Dale Garges
  • Paul R. Blankenhorn
  • Donald E. Kline

Keywords:

Epoxy, impregnation, wood-polymer composites

Abstract

The effects of epoxy impregnation on the MOR and MOE of intact and failed yellow-poplar (Liriodendron tulipifera L.) clear sapwood beams were investigated. Both impregnated and unimpregnated specimens were partially failed in bending, impregnated to stabilize the cracks, and retested. The presence of induced cracks had a significant effect on the MOR of the material after impregnation or reimpregnation, but not on the MOE. Both the MOR and MOE of the failed, then impregnated material exceeded the values for unimpregnated yellow-poplar.

References

Avent, R. R., L. Z. Emkin, and P. H. Sanders. 1978. Behavior of epoxy repaired full-scale timber trusses. J. Struct. Div., ASCE10(ST6):933-951.nAvent, R. R., P. H. Sanders, and L. Z. Emkin. 1979. Structural repair of heavy timber with epoxy. For. Prod. J.29(3):15-18.nBlankenhorn, P. R., and D. E. Kline. 1977. Enhancement of compressive properties of failed concrete cylinders with polymer impregnation. J. Test. Eval.5(4):333-337.nGurfinkel, G. 1973. Pages 21-57 in Wood engineering. Southern Forest Products Association, New Orleans, LA.nMoore, G. R. 1981. Dynamic mechanical properties of some wood-polymer composite materials. Ph.D. thesis, The Pennsylvania State University.nMoore, G. R., P. R. Blankenhorn, and D. E. Kline. Dynamic mechanical properties of some epoxy-poplar composite materials. Wood Fiber Sci. (in press).nMurray, M. A., and V. F. Schulthers. 1977. Polymerization of concrete fights cavitation. Civil Eng., April1977:67-70.nShell Chemical Co. 1967. Epon resins for casting. Shell Chemical Company/Plastics and Resins Division, New York.n

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Published

2007-06-27

Issue

Number 4 / October 1984

Section

Research Contributions

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