BMP Monitoring Sites - Urban Drainage and Flood Control District
BMP Monitoring Sites - Urban Drainage and Flood Control District BMP Monitoring Sites - Urban Drainage and Flood Control District
UDFCD BMP MONITORING SITES Porous Asphalt Pavement Typical Details 5.0' 20.0' 92.0' 20.0' TEMPORARY ORANGE FENCE POROUS ASPHALT 25' 18" RCP @ 1.0% INLETS: 3.5' x 2.0' DWMD BUILDING CONVENTIONAL ASPHALT Porous Asphalt Pavement Plan AASHTO #67, all fractured faces; (CDOT SECT. 703-2, #67 course aggregate) Open-Graded HMA ASTM C-33 Sand Base Course: #3 Aggregate (CDOT Section 703-2) 2% Min. 18.0" Min. 2.5" 2.0" 7.0" 1.0" 6.0" Fill under-drain trench around pipe with Woven geotextile fabric meeting: AASHTO #67 stone ASTM D4751 - AOS U.S. STD. sieve #50 to #70 ASTM D4633 - Min. trapezoidal tear strength 100 X 60 lbs, Minimum COE specified open area of 4% 6.0" 6.0" 1" Thick sand cushion layer 16 mil impermeable liner under all paved areas wrapped to top of pavement Schedule 40 HDPE 4" Under-drain Porous Asphalt Pavement Section
UDFCD BMP MONITORING SITES Porous Asphalt Pavement Installation Guidelines Design Thickness Asphalt Binder Design the thickness of the porous asphalt slab to have a finished thickness of 2.5 inches with a bituminous binder of 5.5% to 6.5% by weight dry aggregate. Use neat asphalt binder modified with an elastomeric polymer to produce a binder meeting the requirements of PG 76022. The elastomeric polymer shall be styrenebutadiene-styrene (SBS) or approved equivalent, applied at a rate of 3% by total weight of the binder. The composite materials shall be thoroughly blended at the asphalt refinery or terminal prior to being loaded into the transport vehicle. The polymer-modified asphalt binder shall be heat and storage stable. Aggregate Gradation Aggregate in the asphalt mix shall be a minimum 90% crushed material and have the following gradation: U.S. Standard Sieve Size Percent Passing 0.5-inch (12.5 mm) 100 0.375-inch (9.5 mm) 75-95 #4 (4.75 mm) 25-35 #8 (2.36 mm) 10-15 #16 (1.18 mm) 5-10 #30 (600 µm) 1-5 #200 (75 µm) 1-3 Batch Testing To test draindown, air voids and abrasion, prepare three batches containing asphalt binder contents of 5.5, 6.0 and 6.5 percent by dry weight aggregate. The asphalt content that provides the best results according to the following table shall be selected as the final mix. Test the final mix for Moisture Susceptibility and Resistance to Stripping. If the final mix does not meet the requirements for moisture susceptibility and resistance to stripping, add hydrated lime until the requirements are met.
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UDFCD <strong>BMP</strong> MONITORING SITES<br />
Porous Asphalt Pavement<br />
Typical Details<br />
5.0'<br />
20.0'<br />
92.0'<br />
20.0'<br />
TEMPORARY ORANGE FENCE<br />
POROUS<br />
ASPHALT<br />
25'<br />
18" RCP<br />
@ 1.0%<br />
INLETS:<br />
3.5' x 2.0'<br />
DWMD<br />
BUILDING<br />
CONVENTIONAL<br />
ASPHALT<br />
Porous Asphalt Pavement Plan<br />
AASHTO #67, all fractured<br />
faces; (CDOT SECT. 703-2,<br />
#67 course aggregate)<br />
Open-Graded HMA<br />
ASTM C-33 S<strong>and</strong><br />
Base Course: #3 Aggregate<br />
(CDOT Section 703-2)<br />
2% Min.<br />
18.0" Min.<br />
2.5"<br />
2.0"<br />
7.0"<br />
1.0"<br />
6.0"<br />
Fill under-drain trench<br />
around pipe with<br />
Woven geotextile fabric meeting:<br />
AASHTO #67 stone<br />
ASTM D4751 - AOS U.S. STD. sieve #50 to #70<br />
ASTM D4633 - Min. trapezoidal tear strength 100 X 60 lbs,<br />
Minimum COE specified open area of 4%<br />
6.0"<br />
6.0"<br />
1" Thick s<strong>and</strong><br />
cushion layer<br />
16 mil impermeable liner<br />
under all paved areas<br />
wrapped to top of pavement<br />
Schedule 40 HDPE<br />
4" Under-drain<br />
Porous Asphalt Pavement Section
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