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12 <br />10 <br />0 <br />6 <br />0 <br />• <br />• Air Voids <br />• Inch per Day <br />Linear (Air Voids) <br />— 3 <br />- 2.5 <br />Linear (Inch per Day) _ <br />2 <br />• - 1.5 <br />■ <br />• <br />• <br />• <br />■E <br />OP <br />2 = 0.5736 <br />-1. ■ ■ <br />2-n_riR/IF'- <br />1 <br />- 0.5 <br />- 0 <br />- -0.5 <br />110 120 130 140 150 160 170 <br />Nuclear Density (Ibs/ft3 ) <br />1 <br />Permeability (inch/day) <br />Figure 20 Air Voids and Permeability vs. Density <br />Figure 2 was made to compare it to the results found in a report from Cooley Jr., Brown and <br />Maghsoodloo, "Development of Critical Field Permeability and Pavement Density Values for <br />Coarse Graded Super Pave Pavements." In this report the authors compared lab permeability to <br />air voids. We saw similar results, it is important to note in this study the mixes tested are dense <br />graded. Our results show a similar curve but less permeability. <br />E-2 <br />