325 SECTION 706
706.01 Description
This work consists of furnishing and placing a field laboratory.
706.02 Equipment
A.General. Provide a level, fully insulated, and weather tight building Equip the exterior doors with a working latch and a hasp that is capable of receiving a padlock. Provide a laboratory that has the following:
1.A minimum of six screened windows on two or more sides, with a minimum of one window in each room. Windows shall have a minimum area of 4 square feet;
2.A constant source of electricity;
3.A minimum of 6 convenience outlets spaced throughout the building;
4.Sufficient light fixtures to uniformly light the interior;
5.A constant potable water supply with a minimum pressure of 5 psi or a minimum head of 12 feet when a gravity tank is used;
6.A faucet and sink. The sink shall drain to the exterior and away from the laboratory;
7.A heating system capable of maintaining a minimum temperature of 70°F;
8.An air conditioning system capable of maintaining a temperature below 80°F;
9.An operable portable fire extinguisher capable of controlling Class A, B, and C fires in each room of the laboratory;
10.Entry steps with a 4 feet x 4 feet landing that meet the following: − A non-slip surface; − Securely fastened to the building; − Position the landing so a person carrying a load can stand on the platform and safely enter the laboratory; and − A safety railing.
11.Workbenches shall be: − Sturdy; − A minimum of 24 inches deep; and − 36 inches to 42 inches above the floor.
12.A Microwave with a minimum of 900 Watts of power, 1 cubic foot of interior space, and a removable glass tray;
13.30 inch range with an oven capable of maintaining a temperature between 221°F and 239°F;
14.A chair; and
15.A table or desk. Furnish Aggregate and Bituminous labs with DSL broadband internet and a router that broadcasts Wi -Fi and will allow for hard wiring of a computer. The building and fixtures remain the property of the Contractor after the work is completed. 326 B. Aggregate Laboratory. Place the laboratory at a location acceptable to the Engineer. The Engineer will have the full control and the exclusive use of the laboratory. Provide a laboratory with a minimum floor area of 230 square feet, minimum exterior width of 8 feet, and a minimum ceiling height of 7 feet. Partition the building into a minimum of two rooms, a smaller room having a floor area of approximately 70 square feet. Provide a workbench with a length of 7 feet in the smaller room: Provide the following equi pment in the larger room:
1.Mechanical shaker capable of receiving 6 trays that have a screen size of 14 inches by 14 inches and the following compatible sieves: − 1-1/2 inch; − 1-1/4 inch; − 1 inch; − 3/4 inch; − 1/2 inch; − 3/8 inch; − No. 4; and − An enclosed dust pan.
2.Mary Ann shaker capable of being adjusted to receive 8 and 12 inch diameter sieves;
3.Splitter with a maximum hopper capacity of 0.6 cubic feet;
4.Splitter with a minimum hopper capacity of 1.0 cubic feet; and
5.An exhaust fan capable of changing the air in the room every minute.
C.Bituminous Laboratory. Place the laboratory at the plant site near the Contractor’s laboratory and where plant operations will not interfere with the laboratory equipment. The Engineer will have the full control and the exclusive use of the laboratory. Provide the following items:
1.Mary Ann shaker capable of being adjusted to receive 8 and 12 inch diameter sieves.
2.Splitter with a maximum hopper capacity of 0.6 cubic feet.
3.Splitter with a minimum hopper capaci ty of 1.0 cubic feet.
4.A water bath that holds a minimum of 5 gallons. Equip the water bath with thermostatic controls capable of maintaining a water temperature between 76°F and 78°F. Equip the water bath with an overflow system to maintain a uniform water level and a recirculation system with on/off controls.
5.An orbital shaker with: − An orbit size of 0.75 in and a stirring speed range between 40 and 400 RPM; − A top plate large enough to accommodate two 2,000 milliliter filtering flasks; and − Two clamps to hold flasks in place.
6.A vacuum pump capable of evacuating air from a 2000 milliliter filtering flask to a residual pressure of 30 millimeters mercury (4.0 kilopascals).
7.A vacuum gauge capable of measuring a minimum pressure of 30 millimeters mercury (4.0 kilopascals). 327 8. A forced draft oven with an interior capacity of 6 cubic feet and that is capable of maintaining a temperature between 320°F and 330°F.
9.An insulated container to transport bituminous mix from the paver to the laboratory. Provide a container large enough to hold 22 pounds of mix that will be in other containers.
D.Contractor’s Laboratory. Provide a laboratory and equipment necessary to perform the Quality Control (QC) tasks required in Section 430, “Hot Mix Asphalt” . Include a gyratory compactor that meets the requirements of AASHTO T 312. The Engineer will use the gyratory compactor in this laboratory to perform required Quality Assurance testing. Allow the Engineer access to the gyratory compactor for inspection and use.
706.03 Materials
Reserved.
706.04 Construction Requirements
A.General. Level, block, and tie down the lab when placing. Notify the Engineer when the laboratory is ready for occupancy. Do not begin work associ ated with the laboratory until the Engineer has accepted the laboratory. Do not remove the laboratory until it is released by the Engineer.
B.Aggregate and Bituminous Laboratories. Aggregate and Bituminous laboratories are for the Engineer’s exclusive use. Perform all functions requiring the use of laboratory equipment in the Contractors Laboratory or other facilities separate from those provided for the Engineer. Once the Engineer has accepted the laboratory, the Engineer and Contractor will perform a review of the condition of the contents and the laboratory. Provide an inventory of the initial condition of the contents and the laboratory. The Engineer must review and sign the inventory. The Contractor and Engineer will perform a second review of the c ondition of the contents and the laboratory before the Engineer releases the laboratory. If any of the contents need to be repaired and replaced due to misuse or negligence, the Department will compensate the Contractor as specified in Section 104.02, “Contract Revisions” .
C.Contractor’s Laboratory. Notify the Engineer when the gyratory compactor is ready for initial inspection. Do not begin work that requires the Engineers use of the gyrator y compactor until the Engineer has approved the gyratory compactor and the access to the gyratory compactor.
706.05 Method of Measurement
The Engineer will measure as specified in Section 109.01, “Measurement of Quantities”. 328 706.06 BASIS OF PAYMENT Pay Item Pay Unit Aggregate Laboratory Each Bituminous Laboratory Each Contractor’s Laboratory Each Such payment is full compensation for furnishing all materials, equipment, labor, and incidentals to complete the work as specified. In Depth Review 2022 Section 709 329 SECTION 709 GEOSYNTHETICS
709.01 Description
This work consists of furnishing and installing geosynthetics.
709.02 Equipment
Reserved.
709.03 Materials
Item Section Geosynthetics 858
709.04 Construction Requirements
A.General. Package, label, identify, handle, and store geosynthetic according to ASTM D 4873. Wrap each geosynthetic roll (excluding Geogrid – Type G and Reinforcement Geogrid – Type RG) with a material that will protect the roll, including the ends of the rolls, from damage due to shipment, water, sunlight, and contaminants. Maintain protective wrapping during periods of shipment and storage. Store geosynthetic onsite elevated off the gr ound. Install geosynthetic only after receiving approval from the Engineer. Place the geosynthetic on a surface that is smooth and free of stones, sticks, and other debris or irregularities that could damage the geosynthetic. Manually pull the geosynthetic taut to remove wrinkles. Do not operate construction equipment directly on the geosynthetic. If sewn, place geosynthetic with all seams up. Overlap or sew the joints. Overlap as required for the specific geosynthetic type. U se Kevlar, polypropylene, or polyester thread when sewing joints . Use a 401 stitch conforming to ASTM D 6193 for all seams. Use SSn-2 overlapping “J” seams for field seams. Sew all seams with two parallel stitch lines spaced approximately 1/4 inch apart. Place the outside stitch 1 inch from the edge of the geosynthetic. Sew seams that meet the strength requirements for the specific geosynthetic type. Furnish a sewn seam sample that has the same geosynthetic material, thread, seam spacing and number, and field seam overlap distance that will be used in the work. After laydown, cover geosynthetic material within 5 days. Remove and replace material that is not covered within 5 days.
B.Geosynthetic Drainage Material (Type D). Secure geosynthetic using the manufacturer’s recommended meth ods. After securing geosynthetic material in place, deposit the aggregate using methods that will not tear, puncture, or reposition the geosynthetic. Do not drop aggregate on the geosynthetic from a height greater than 3 feet.
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Source: North Dakota Standard Specifications for Road and Bridge Construction, 2022 Edition. Pages 360–363 of 550. View official source ↗