|
The evaluation of treatability is based on the rate of absorption of
preservative when test specimens of standard dimensions are
subjected to an open-tank treatment using a mixture of 50% creosote
and 50% diesel oil heated to a temperature of 87°C in 2.5 hours and
maintained at this temperature for 1 hour before cooling to room
temperature over a period of 16 hours. It has been found
convenient to classify treatability into seven groups as shown in
the table below.
|
Treatability Grouping |
| Group |
Absorption Range |
| Extremely
Easy |
> 320 kg/m3 |
| Very Easy |
190 - 320
kg/m3 |
| Easy |
130 - 190
kg/m3 |
| Average |
95 - 130
kg/m3 |
| Moderately
Difficult |
65 - 95 kg/m3 |
| Difficult |
30 - 65 kg/m3 |
| Very
Difficult |
< 30 kg/m3 |
|
