Retrospective Evaluation of Cured-in-Place Pipe - (NEPIS)(EPA ...
Retrospective Evaluation of Cured-in-Place Pipe - (NEPIS)(EPA ...
Retrospective Evaluation of Cured-in-Place Pipe - (NEPIS)(EPA ...
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
The result<strong>in</strong>g gradation curves are shown <strong>in</strong> Figure 5-5.<br />
Figure 5-5. Gra<strong>in</strong> Size Distribution <strong>of</strong> Soil Samples (Columbus 8-<strong>in</strong>. L<strong>in</strong>er Site)<br />
Based on the gra<strong>in</strong> size distribution, both the backfill and bedd<strong>in</strong>g soils can be considered to be sandy<br />
soils. The flatter slopes <strong>of</strong> the result<strong>in</strong>g gradation curves suggest that the bedd<strong>in</strong>g and surround<strong>in</strong>g soil<br />
are well-graded.<br />
5.2.5.2 Soil Specific Gravity and Absorption. This standard test<strong>in</strong>g method is used to calculate the<br />
density, relative density, and absorption <strong>of</strong> f<strong>in</strong>e aggregates. Soil material weigh<strong>in</strong>g 500 g was taken from<br />
each <strong>of</strong> the six samples for perform<strong>in</strong>g the needed tests. The results are listed <strong>in</strong> Table 5-2.<br />
Table 5-2. Soil Specific Gravity and Absorption Results (Columbus 8-<strong>in</strong>. Site)<br />
Soil Bulk Specific Bulk Specific Apparent Specific Absorption<br />
Sample ID (g) Gravity (OD)* Gravity (SSD)** Gravity<br />
(%)<br />
1 500 2.28 2.42 2.65 6.04<br />
2 500 1.73 2.07 2.61 19.59<br />
3 500 1.57 1.98 2.63 25.53<br />
4 500 1.52 1.97 2.78 29.77<br />
5 500 1.18 1.59 1.99 34.41<br />
6 500 1.56 1.96 2.60 25.44<br />
*OD: Oven dry.<br />
** SSD: Saturated surface dry.<br />
67