. The Effect of two flame retardants on particulate and residue production. Fireproofing agents; Prescribed burning; Forest management. RESULTS Treatment Effect on Thermal Variables The effect of the retardants on the burning characteristics of the crib fires is quite appar- ent. Both AS and DAP lowered the maximum weight loss rate, flame height, and radiant energy output. The effect of DAP treatment level on weight loss rate is shown in figure 3 and that for AS level is shown in figure 4. As can be seen, the increase in treatment level lowers the weight loss rate and increases the time to rea
. The Effect of two flame retardants on particulate and residue production. Fireproofing agents; Prescribed burning; Forest management. RESULTS Treatment Effect on Thermal Variables The effect of the retardants on the burning characteristics of the crib fires is quite appar- ent. Both AS and DAP lowered the maximum weight loss rate, flame height, and radiant energy output. The effect of DAP treatment level on weight loss rate is shown in figure 3 and that for AS level is shown in figure 4. As can be seen, the increase in treatment level lowers the weight loss rate and increases the time to reach maximum intensity. Treatment level refers to the percent of chemical on the cribs, excluding the 4 by 4's. The graphs of the equations for treatment against maximum radiation are shown in figures 5 and 6. The DAP treatments are most effective in both cases. The difference between types of chemi- cals is significant at the 99 percent level as determined by the F test (table 2). The sequential photographs in figure 7 clearly show the effects of the two chemicals on intensity: buildup time is increased and the intensity is decreased (indicated by flame size); DAP was the most effective. Figure 8 shows the three fires at the time of maximum intensity and the residue left following active combustion. Effect on Residue The residue remaining following the fire was related to the type of treatment (fig. 9). The total residue and DAP treatment level had a correlation coefficient R2 of ; the R2 for AS was However, the effects of the two types of treatment were statistically different at the 99 percent level. The residue from the 4 by 4's alone was found not to be significant, both within and between types of treatments. 2000 1476%. 12 16 20 24 Elapsed time (min ) 28 32 36 2000 Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly r
Size: 2177px × 1148px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiod, booksubjectforestmanagement
