Literature reports have indicated that application of
sonic pressure waves enhances the rate of impregnation of
preservatives in wood. However, these studies have been
limited and inconclusive. The technique or process is not
in commercial use. In this study a laboratory scale
treating cylinder connected to a mechanical sonic wave
generator was used to measure the rate of impregnation of
water in ponderosa pine at pressures of 0.28, 0.55 and
0.69 MPa and Douglas-fir at pressures of 0.55 and 0.69 MPa
at a frequency of 30 Hz. Results were compared with those
obtained at the same conditions of static hydraulic
pressure. Statistical analysis showed that sonic
treatments were at least as effective as, but not
consistently superior to, hydraulic pressure treatments in
the case of ponderosa pine. Statistical analysis of the
results from Douglas-fir treatment showed that sonic
treatment was superior than hydraulic treatment. / Graduation date: 1995
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/35316 |
| Date | 22 June 1994 |
| Creators | Nair, Hari U. |
| Contributors | Burhanuddin, Sheikh |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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