论文部分内容阅读
Rates of fixation in chromated copper arsenate (CCA-C) treated red pine (Pinus resinoss Ait.) and southern pine (Pinus spp) sapwood specimens using retention of 1 .5, 2.0, 6.4 kg m-3 are compared at temperature (T) ranging from 70 ℃ to 50 ℃ and 5 different relative humidity (RH) conditions. The samples were investigated using the expressate method to follow chromium fixation. Red pine fixes faster than southern pine under all11 post treatment schedules. The fixation rates for both species are not significantly different while the blockswere fixed under 6 fixation/drying schedules that differed only in the order of T/RH conditions applied, The rate offixation of al f samples in any fixation stage were reduced when the blocks were fixed under lower humidity conditions in spite of no change in chamber temperature. Some of this influence can be attributed to the effect of humidity on heat transfer into the wood and cooling of the wood Surface.
Rates of fixation in chromated copper arsenate (CCA-C) treated red pine (Pinus resinoss Ait.) And southern pine (Pinus spp) sapwood specimens using retention of 1.5, 2.0, 6.4 kg m-3 are compared at temperature ) ranging ranging from 70 ° C to 50 ° C and 5 different relative humidity (RH) conditions. The samples were investigated using the expressate method to follow chromium fixation. Red pine fixes faster than southern pine under all11 post treatment schedules. The fixation rates for both species are not significantly different while the blocks are fixed under 6 fixation / drying schedules that differed only in the order of T / RH conditions applied, The rate off of the al f samples in any fixation stage were reduced when the blocks were fixed under lower humidity conditions in spite of no change in chamber temperature. Some of this influence can be attributed to the effect of humidity on heat transfer into the wood and cooling of the wood Surface.