Variability of Ignition Furnace Correction Factors (2017) / Chapter Skim
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Pages 65-68
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65 AASHTO T 308 procedures require the determination of asphalt content and aggregate correction factors for each asphalt mixture and for each ignition furnace used. In some instances, when numerous asphalt mix designs and several ignition furnaces are available, correction factors have been shared, in some laboratories, between ignition units, even when that practice is not permitted by AASHTO T 308.
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From page 66... ...
66 lowest correction factor, and Option 2 yielded the highest correction factor. The change in asphalt correction factor caused by changing the burning profiles was more pronounced for Mix 4.
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From page 67... ...
67 and 2, the within-laboratory and between-laboratory standard deviations were similar: 0.089 and 0.074 for the withinlaboratory standard deviation and 0.131 and 0.111 for the between-laboratory standard deviation. These numbers are close to the standard deviations recommended in AASHTO T 308, 0.069 and 0.117 for within-laboratory and betweenlaboratory, respectively.
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From page 68... ...
68 low correction factors that were obtained during the roundrobin study. 6.2.1.6 Lab 21-TX The test results for this laboratory showed higher correction factors for Mixes 3 and 4.
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