Effects Of Shelling Ratios On The Sorption And Flexural Properties Of Cement Branded Paticleboard Prpduced From Mixed Nigerian

J.A. FWVAPE 11 PAGES (5571 WORDS) Forestry Paper

The mean Moduli of Rupture and Elastiuty (NOR and MOE) measured for each of the 12 treatment combinations used in this experlment are summarised in Table 1, MOR values ranged from 4.23 to 11.92 N/ mm2 while MOE values ranged from 1950 to 4140 N/mmz. These range values, conform favourably to the range values of 3.28 to 10.46 N/mm2 (MOR) and 2200 ta 4010 N/ mm2 (MOE) reported by Badejo et al(2011). Furthermore, the mean MOR range values of 6.62 to 11.92 N/mmz obtalned for some of the boards compared favourably to mean values of 11.3 fl/mm2, range values of 8.8 to 12.7 N/mm2; 5.22 to 11.12 N/mm2 and 6.21 to 9.65 N/mm2 reported in literature by Dinwoodie (1978), Bison-Werke (1981), Badejo (1988) and (1989) respectively. In a simllar vein, the MOE range values of 2410 to 4140 N/mmZ obtained for 9 out of the 12 experimental treatment combinations compare favourably to the mean value of 2940 M/mrn2 and range values of 480 to 3400 N/mrn2 reported by Oyagade (1990). The facturial analysis of variance which tested the effects of panel layer characteristics as symbol1sed by sawdust surface layerlflake core layer thickness ratio and the other two production variables (cernenvwood mixing ratio and board density) used along with it