Laboratory evaluation of aging for asphalt-aggregate mixtures
Laboratory evaluation of aging for asphalt-aggregate mixtures
Laboratory evaluation of aging for asphalt-aggregate mixtures
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toughness, and fatigue per<strong>for</strong>mance, should generally increase with<br />
increasing spectrum width.<br />
a. Tgp, Temperature @ Gel Point<br />
b. S(tau), Width <strong>of</strong> Relaxation Spectrum<br />
A ranking <strong>of</strong> the <strong>asphalt</strong>s is given in Table 2.8.<br />
Table 2.5. Ranking <strong>of</strong> <strong>asphalt</strong>s in load associated fatigue bending beam at<br />
20°C (68°F)<br />
Log<br />
Asphalt G, at 20°C (68°F) Score Rating<br />
Pa<br />
AAA-1 6.37 8.0 P<br />
AAB-1 6.99 4.5 M<br />
AAC-1 6.99 4.5 M<br />
AAD-1 6.66 6.4 M<br />
AAF-1 7.44 2.1 G<br />
AAG-1 6.98 4.6 M<br />
AAK-1 7.26 3.1 M<br />
AAM-1 7.63 1.0 G<br />
Table 2.6 Ranking <strong>of</strong> <strong>asphalt</strong>s in load associated fatigue bending beam at 0°C<br />
(32°F)<br />
Nf @ 0°C Log<br />
(32°F) G* @ 0°C Average Total<br />
Asphalt Cycles Score (32°F) Pa Score Score Score Rating<br />
AAA-1 15064 8.0 7.403 1.0 4.5 4.0 M<br />
AAB-1 22879 4.4 7.640 2.8 3.6 2.4 G<br />
AAC-1 20147 5.6 7.934 5.1 5.4 5.5 M<br />
AAD-1 23630 4.0 7.474 1.6 2.8 1.0 G<br />
AAF-1 30115 1.0 8.047 6.0 3.5 2.2 G<br />
AAG-1 20088 5.7 8.304 8.0 6.8 8.0 P<br />
AAK-1 18537 6.4 7.749 3.7 5.0 4.9 M<br />
AAM-1 26358 2.7 7.910 4.9 3.8 2.8 M<br />
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