US 670 is a woven, calendared, monofilament filtration geotextile made of 100% polypropylene yarns. It is specifically designed for drainage and filtration applications. A Percent Open Area of 4 - 6%, gives it excellent hydraulic properties, while reducing the chances of clogging. US 670 will satisfy the requirements as outlined in AASHTO M-288-06 for Permanent Erosion Control & Subsurface Drainage Class 2 & 3 (>15% fines) and meets the following M.A.R.V. values except where noted:
| PROPERTY |
TEST METHOD |
ENGLISH |
METRIC |
| Weight - Typical |
ASTM D-5261 |
5.6 oz/sy |
190 g/sm |
| Tensile Strength |
ASTM D-4632 |
370 x 250 lbs |
1,646 x 1,112 N |
| Elongation @ Break |
ASTM D-4632 |
16 x 15% |
16 x 15% |
| Wide Width Tensile |
ASTM D-4595 |
2,700 x 1,740 lbs/ft (225 x 145 lbs/in) |
40 x 26 kN/m |
| Puncture Strength |
ASTM D-4833 |
120 lbs |
534 N |
| CBR Puncture |
ASTM D-6241 |
950 lbs |
4,228 N |
| Trapezoidal Tear |
ASTM D-4533 |
100 x 60 lbs |
445 x 267 N |
| Apparent Opening Size |
ASTM D-4751 |
70 US Sieve |
0.212 mm |
| Permittivity |
ASTM D-4491 |
0.28 Sec-1 |
0.28 Sec-1 |
| Water Flow Rate |
ASTM D-4491 |
18 g/min/sf |
733 l/min/sm |
| Percent Open Area |
CW-02215 |
4-6% |
4-6% |
| UV Resistance @ 500 Hours |
ASTM D-4355 |
90% |
90% |
| ROLL SIZE |
AREA |
WEIGHT |
| 12' x 300' |
400 sys |
180 lbs |
| 6' x 300' |
200 sys |
90 lbs |
Spec Interpretation