GEOSYNTHETIC REINFO RCEMENT 326.04
C.Weather Limitations Secure fabric with large nails and washers or with base material if wind disturbs the fabric.
325.05 Method of Measuremen T
The Resident Engineer will measure the are a covered by Separator Fabric after placement, not including overlaps.
325.06 Basis of Payment
The Department will pay for each pay item at the contract unit price per the specified pay unit as follows: Pay Item: Pay Unit: SEPARATOR FABRIC Square Yard [Square Meter]
326.01 Description
This work consists of installing geosynthetic reinforcement material beneath the aggregate base layer in the pavement structure, or beneath the roadway embankment. This includes the use of geogrids and geotextiles. Geotextile is made of synthetic fibers manufactured in a woven or loose nonwoven manner to form a blanket -like product used to reinforce soil and rock. Geogrid is a co ntinuous sheet of net -shaped synthetic material formed by tensile elements that reinforce soil and rock by interlocking.
326.02 Materials
Use geosynthetic reinforcement that is an integrally -formed single layer structure. Provide geogrids in accordance wit h Subsection 712.07, "Geogrid Subgrade Reinforcement of Pavement Structures." Provide geotextiles in accordance with Subsection 712.04, “Geotextiles for Subgrade Reinforcement.” 326. 03 EQUIPMENT — VACANT
326.04 Construction Methods
A.General Label each roll with product identification for inventory and quality control. In the field, protect geosynthetic rolls from the following: Site construction damage, Ultraviolet radiation (inclu ding sunlight for more than 24 hr),
326.04 Geosynthetic Reinforcement
204 Strong acids, Strong bases, Flames, Sparks, Temperatures above 160 F [70 C], and Other environmental conditions harmful to the geosynthetic. Elevate the rolls above the ground surface and protect them with an opaque, waterproof cover when storing the geosynthetics outdoors. Ensure the geosynthetic manufacturer or a representative is present to observe and advise on the first full day of geosynthetic installation. Before placing the geosynthetic, clear the site of tops oil, trees, stumps, rocks, and large debris in accordance with Section 201, "Clearing and Grubbing." Place the geosynthetic in the direction of the fill operation. Tension the geosynthetic by hand and secure to the ground as di rected by the Resident Engineer. Anchor the geosynthetic to the ground so that wrinkles formed during fill or aggregate placement unfold freely as additional fill is placed. Ensure the overlapping sections of the geosynthetic do not separate during the p lacement of fill. Cut the geosynthetic and overlap diagonally to accommodate curves in the alignment and to prevent excessive wrinkling. Secure overlap areas with small piles of aggregate fill, pins with washers, or large, heavy -gauge staples driven secur ely into the subgrade. Do not operate tracked construction equipment directly on the geosynthetic. Place a layer of fill with a thickness of at least 8 in [200 mm] over the geosynthetic before operating tracked vehicles on the geosynthetic. Operate rubber -tired equipment over the geosynthetic at speeds no greater than 5 mph [8 km/h] if the underlying subgrade can support the loads without rutting, and the tires do not damage or wrinkle the geosynthetic. Avoid sudden braking or sharp turning when operating equipment on the geosynthetic.
1.Placement in the Pavement Section After clearing the site, grade and smooth with a non -vibratory, steel -wheeled roller to achieve a firm, level working surface. Place the geosynthetic at the elevation and alignment shown on the Plans and parallel to the centerline of the roadway. Unroll the geosynthetic in the direction of the fill operation. Do not place geosynthetic more than 500 ft [152 m] ahead of the aggregate base placement. End-dump the aggregate base material di rectly onto the geosynthetic or on the previously placed aggregate base. Blade the aggregate base material onto the geosynthetic so that the aggregate base rolls onto the material ahead (e.g. by gradually raising a dozer blade while moving forward). Fill ruts in the aggregate base with additional aggregate base material; do not blade adjacent material to fill ruts. Place at least 8 in [200 mm] of aggregate base material over the geosynthetic. GEOSYNTHETIC REINFORCEMENT 326.05
2.Placement under Roadway Embankment End dump fill material on to the geosynthetic or on the previously placed fill after clearing the site. Blade the fill material onto the geosynthetic so that the fill rolls onto the material ahead (e.g. by gradually raising a dozer blade while moving forward). Place at least 8 in [200 mm] fill material over the geosynthetic.
B.Geotextile Place geotextile in accordance with Subsection 325.04, “Construction Methods.” If placing geotextile rolls side -by-side or end -to-end, overlap, sew, or join t he edges in accordance with AASHTO M 288, Appendix A3, and Table 8. Ensure sewn seams are in accordance with AASHTO M 288, Appendix A1.
C.Geogrid Place the geogrid at the locations shown on the Plans or as directed by the Resident Engineer. Keep the geo grid smooth and taut while placing the cover material and ensure that stakes or anchors do not restrict the movement of the geogrid. Ensure the geogrid sections do not separate at overlaps during placement of cover material. If placed at curves, cut the geogrid and overlap diagonally to prevent buckling.
1.Overlap Overlap geogrid rolls by placing the end of the roll to be covered first over the end of the succeeding roll. Overlap adjacent rolls of geogrid 3 ft [0.3 m] in each direction tie adjacent rol ls with hog rings or cable ties at intervals of 5 ft [1.5 m]. Secure the geogrid corners with fill material.
2.Placement of Fill Do not operate equipment directly on geogrid placed on soft ground. Dump fill directly onto the geogrid for normal soil cond itions. For softer soil conditions, dump fill on previously placed fill that will bear the weight of the fill material and push the fill over the geogrid. When placing fill on the subgrade, work from areas of stronger soil conditions to areas of weaker s oil conditions. For very soft soil conditions, use a lightweight, low ground -pressure dozer to place fill as directed by the Resident Engineer. Compact with a light roller and add moisture for most soil conditions. For very soft soil conditions, use stat ic rather than vibratory compaction. If rutting or severe pumping occurs under equipment, add fill to strengthen the section.
326.05 Method of Measuremen T
The Resident Engineer will measure the area of completed Geotextile Reinforcement and Geogrid Reinforcement , not including overlaps.
326.06 Geosynthetic Reinforcement
206 326.06 BASIS OF PAYMENT The Department will pay for each pay item at the contract unit price per the specified pay unit as follows: Pay Item: Pay Unit:
A.GEOTEXTILE REINFORCEMENT Square Yard [Square Meter]
B.GEOGRID REINFORCEMENT Square Yard [Square Meter] Include the cost of preparing, grading, and rolling the site to be included in the contract unit price for Geotextile Reinforcement and Geogrid Reinforcement . The Department will pay for aggregate as Aggregate Base Type A , Type B , and Type C in accordance with Section 303, “Aggregate Base.” CHAPTER 400 GENERAL REQUIREMENTS FOR SURFACES SECTION: PAGE NO.: SECTION 401 GENERAL REQUIREMENTS FOR SURFACES ................................ ................................ ....... 209 SECTION 402 TRAFFIC -BOUND SURFACE COURSE ................................ ................................ ................. 211 SECTION 403 CHIP SEAL ................................ ................................ ................................ ....................... 212 SECTIO N 404 ULTRA -THIN BONDED WEARING COURSE ................................ ................................ ........ 218 SECTION 405 PERMEABLE FRICTION COURSE ................................ ................................ ....................... 221 SECTION 406 OPEN -GRADED FRICTION SURFACE COURSE ................................ ................................ ....224 SECTION 407 FOG SEAL AND TACK COAT ................................ ................................ ............................. 226 SECTION 408 PRIME COAT ................................ ................................ ................................ ................... 228 SECTION 409 FABRIC REINFORCEMENT FOR ASPHALT PAVEMENT ................................ ....................... 230 SECTION 410 MICRO SURFACING ................................ ................................ ................................ ......... 232 SECTION 411 HOT MIX ASPHALT / WARM MIX ASPHALT ................................ ................................ ......237 SECTION 412 COLD -MILLING PAVEMENT ................................ ................................ ............................. 254 SECTION 413 RUMBLE STRIP ................................ ................................ ................................ ................ 255 SECTION 414 PORTLAND CEMENT CONCRETE PAVEMENT ................................ ................................ ....256 SECTION 415 CONCRETE JOINT SEALING ................................ ................................ .............................. 277 SECTION 416 DOWEL BAR RETROFIT ................................ ................................ ................................ ....280 SECTION 425 DIAMOND GRINDING CONCRETE PAVEMENT ................................ ................................ ..283 SECTION 426 PRESSURE GROUTING PAVEMENT ................................ ................................ .................. 285 SECTION 433 RUBBLIZING PORTLAND CEMENT CONCRETE PAVEMENT ................................ ................ 288 SECTION 440 ASPHALT SAFETY EDGE ................................ ................................ ................................ ...290 GENERAL REQUIREMENTS FOR SURFACES 401.03 SECTION 401 GENERAL REQUIREMENTS FOR SURFACES
401.01 Description
This work consists of all types of surface construction.
401.02 Materials
Provide materials for surface construction in accordance with the relevant section or sections of Chapter 700, “Materials.”
401.03 Equipment
A.Distributors and Supply Tanks Provide distributors and supply tanks capable of uniformly applying bituminous material in accordance with the following: At the temperatures specified in the relevant specification sections; On variable widths of surface not to exceed 26 ft [7.8 m]; At rates from 0.010 gal/y d² to 1.000 gal/yd² [0.045 L/m² to 4.525 L/m²]; and With constant pressure and uniform temperature. Ensure the distributor can apply material to vertical faces of asphalt pavement at the joints between paving operations. Prevent variation that exceeds the specified application rate by more than 0.01 gal/yd² [0.045 L/m²]. Provide a distributor equipped with the following: A tachometer, Pressure gauges, Volume -metering devices or a calibrated tank, A thermometer for measuring temperatures of tank contents, A power unit for the pump, Full circulation spray bars adjustable vertically and laterally, A positive shut -off valve, and Fittings that prevent bituminous material from dripping. Frequently check and adjust the angle of the spray nozzles and the height o f the spray bar to ensure uniform distribution of the bituminous material. The Department will not allow drilling, clogging, or streaking the bituminous material. If any of these conditions occur, stop the operation and correct the problems creating thes e conditions before resuming distribution. Check the rate and uniformity of distribution if directed by the Resident Engineer. Provide supply tanks in accordance with AASHTO M 156, Section 3.
Source: Oklahoma Standard Specifications for Highway Construction, 2019 Edition. Pages 217–222 of 935.