Pressure Treatment of Southern Pine Poles With Chlorothalonil In Hydrocarbon Solvent

Authors

  • H. Michael Barnes

Keywords:

Chlorothalonil, pressure treatment, seasoning, conditioning, retention, penetration, preservative gradient

Abstract

A series of end-sealed southern pine pole stubs was treated with chlorothalonil in hydrocarbon solvent. Over sixty sections were treated using various combinations of initial seasoning (kiln-drying, steam-conditioning), treating temperature (ambient, heated), initial air pressure, and final conditioning (steam flash + vacuum, expansion bath + vacuum, steam distillation + vacuum). Disks removed from the treated sections were analyzed for preservative gradient. Results are discussed in terms of treatability and the impact of treating variables on preservative retention, penetration, and gradient shape. These data indicate that acceptable treatment of southern pine pole stock can be obtained with either steam-conditioned or kiln-dried pole stock. The use of heated solution appears to be preferred over ambient solution, although acceptable treatment can be achieved at ambient conditions.

References

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Published

2007-06-19

Issue

Number 2 / April 1996

Section

Research Contributions

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