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Table 60. E. obliqua results summary Surface check % select** [%check free] 97 [96] 95 [94] 0.075 96 [94] 84 [71] 0.009 98 [98] 98 [94] 0.859 Species Trial ID. Drying method E. obliqua 4 (MES1) vacuum conventional (air) significance (p) 8 (MES2) vacuum conventional (kiln) significance (p) 12 (MES3) 16 (MES4) Days drying [% of conventional kiln drying time ] 36.3 [61]†† 380 37 [63] 59 36.7 [62] 59 Initial basic density (kg/m3) [stdev.] Initial MC (%) [stdev.] Final MC (%) average [stdev.] {grade}* 10.5 [0.6] {A} 9.7 [0.3] {A} <0.0001 10.5 [0.9] {B} 10.5 [0.5] {B} 0.725 Final MC % select grade (%)** 100 99 98 100 98 99 MC gradient (%) [stdev.] {grade}* 0.1 [0.5] {B} -0.2 [0.4] {A} <0.0001 -0.2 [0.6] {A} 0.8 [0.8] {A} <0.0001 Drying stress grade quality [stdev.] {grade}* -0.1 [0.7] {B} 0.4 [0.3] {B} <0.0001 0.3 [0.5] {B} 0.2 [0.3] {B} 0.375 0.4 [0.4] {B} 0.8 [0.5] {C} <0.0001 Distortion % in grade** [major type] 96 [twist] 96 [twist] 97 [twist] 97 [twist] 95 [twist] 97 [twist] Collapse (% affected) 100‡ ------ 100‡ ------ 100‡ ------ Internal check % check free 78 88 89 96 96 97 End split grade* A FAIL <0.0001 A FAIL <0.0001 Indication of Economic viability viable viable 476.1[58.7] 122.0[20.0] 491.2[54.6] 112.5[22.7] vacuum conventional (kiln) significance (p) 34.8 [59] 569.5 [67.7] 65.3 [19.8] 9.6 [0.5] {B} 59 9.8 [0.6] {B] 0.004 91 96 0.3 [0.5] {A} 0.0 [0.6] {A} 0.0002 0.4 [0.3] {B} 0.3 [0.3] {B} 0.077 99 [twist] 96 [twist] 100‡ ------ 91 [80] 78 [72] 0.031 95 A NA 85 FAIL <0.0001 10.0 [0.6] {B} 10.5 [0.9] {B} <0.0001 -0.4 [0.4] {A} 0.4 [0.9] {A} <0.0001 A? A 0.932 vacuum conventional (kiln) significance (p) * AS/NZS 4787:2001 Timber-Assessment of drying quality. ** AS 2796: 1999 Hardwood-Sawn and milled products. † † Based on indicitive conventional drying time of 59 days from green (Innes et al . 2008). ‡ Approximately half of the boards were reconditioned. 50% of nonreconditioned boards affected by collapse miss when dressed to 19 mm. 0% of reconditioned boards affected by collapse miss. 544.7 [64.1] 98.0 [ 20.5] Evaluation of super–heated steam vacuum drying viability and development of a predictive drying model for Australian hardwood species – Final report 92PDF Image | Evaluation of super-heated steam vacuum drying
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