737.02 Concrete Surface Finish for Structures
FC = Filler content, percent; F = Weight of filler; and OA = Weight of original adhesive.
g.Filler Fineness Determine filler fineness in accordance with ASTM C 430 using No. 325 [45 µm], No. 200 [75 µm], and No. 100 [150 µm] sieves. Modify this method with a water -soluble, non -toxic wetting agent. Ensure the concentration of the surfactant solution is 1 percent by mass. Wet the 1 g dry sample in the surfactant solution. Allow the sample to soak for 30 min. Transfer the filler into the sieve cup. Apply the filler for 2 min by water -spraying. Add the surfactant solution as needed to disperse clumped particles. Dry and handl e the sample in accordance with ASTM C 430.
4.Packaging and Labeling Provide adhesive packaged in self -releasing, stackable cardboard containers. Ensure containers have a maximum net weight of 120 lb [54.4 kg]. Ensure the label shows the manufacturer, quantity, and lot or batch number with “bituminous adhesive for traffic markers” printed in bold lettering.
737.01 Option I — Heavy Cem Ent Ba Se Mortar
A.Materials Provide a heavy cement base, packaged in dry powder form, for mixing with water. Provide a plaster mix for plaster gun application and a brush and float mix for brush and float application. Provide a formulation of acrylic polymers and modifiers in liquid form as an additive with portland cement mixes to ensure adhesion.
B.Proportioning and Consistency Proportion the bonding agent and water in accordance with the manufacturer’s recommendations. Give the Resident Engineer a copy of the recommendations.
737.02 Option Ii — Paint Ty Pe Spray Finish
A.Materials Provide material for paint spray finish that is a textured commercial product designed as a spray finish.
B.Testing and Certification Brand products not included on the Materials Division approved product list may be qualified by submitting a Type A certification and samples for durability and appearance evaluations. The CONCRETE SURFACE FINISH FOR STRUCTURES 737.02 783 Department will discontinue product approval if products are used in accordance with the manufacturer’s instru ctions and prove unsatisfactory. Ensure the manufacturer includes a Type C certification with each shipment of tested products. Ensure materials for spray finish are in accordance with the following tests: Freeze -thaw cycle, Accelerated weathering, Flexibility, Fungus growth resistance, Abrasion test, and Salt spray resistance.
1.Freeze -Thaw Cycle Using the mix designed for the structure, cast and cure three concrete slabs at least 4 in × 6 in × 6 in [101.6 mm × 152.4 mm × 152.4 mm]. Apply the sur face finish after moist curing the specimens for 14 days, and dry curing them for 24 hr from 60°F to 80°F [15.6°C to 26.7°C]. Do not use excessive oil on specimen forms. Coat and cure the specimen sides at room temperature for 48 hr. Immerse the specime ns in water from 60°F to 80°F [15.6°C to 26.7°C] for 3 hr and repeat 50 cycles of the following procedures: Place the specimens in cold storage at −15°F [−26.1°C] for 1 hr. Thaw the specimens at temperatures from 60°F to 80°F [15.6°C to 26.7°C] for at leas t 1 hr. Ensure specimens show no defects at the end of 50 cycles of the freeze -thaw test.
2.Accelerated Weathering Expose the material to a 5,000 hr test in a twin -arc-weatherometer at an operating temperature of 145°F [62.8°C]. Test in 20 min cycles co nsisting of 17 min of light and 3 min of water spray plus light. At the end of the exposure test, ensure the exposed sample shows no chipping, flaking, or peeling.
3.Flexibility When applied to a thin metal plate at a spreading rate from 40 ft²/gal to 5 0 ft²/gal [0.98 m²/L to 1.23 m²/L], ensure the material bends 180° over a 25.4 mm mandrel without breaking the film.
4.Fungus Growth Resistance Provide material that passes a fungus resistance test in accordance with Federal Specification TT-P-29b. Test for an incubation period of at least 21 days, and ensure the material shows no signs of fungal growth.
5.Abrasion Test Test for abrasion resistance in accordance with ASTM C 418. Ensure the material lost is no greater than 0.5 cm³/cm².
737.03 Concrete Surface Finish for Structures
784 (6) Salt Spray R esistance Apply the material to the concrete at a rate of 50 ft²/gal [1.23 m²/L]. Test the material in accordance with ASTM B 117 with the coating exposed to a 5 percent sodium chloride solution for 300 hr and maintained at a temperature from 90°F ±2°F [3 2.2°C ±1.1°C]. During the exposure period, ensure the material shows no loss of adhesion or deterioration at the end of the 300 hr.
737.03 Elastomeric Coating System
A.General Provide an elastomeric polyurethane waterproof coating system that forms a wat erproof barrier over post -tensioning anchorages or areas shown on the Plans. Provide waterproof coating system components from a single manufacturer. Apply the surface preparation and coating system in accordance with the manufacturer’s recommendations.
B.Physical Properties Provide an elastomeric coating system composed of several coats. Provide an epoxy prime coat if required on the manufacturer’s recommendations for waterproofing systems. Provide a polyurethane chemistry that is waterborne aromatic or aromatic. Provide an elastomeric coating system at least 30 mil thick and in accordance with Table 737:1: Table 737:1 Physical Properties Property Test Value Test Method Hardness, Shore A 60 – 90 ASTM D 2240 Tensile strength >750 psi [5.2 MPa] ASTM D 412 Elongation >400% ASTM D 412 Tear strength >70 pli [12.35 N/mm] ASTM C 957 Abrasion resistance, H-18 wheels 1,000 gm/wheel <350 mg loss/1,000 revs. ASTM C 957 Crack bridging, 1,000 cycles System Passes ASTM C 957 Elongation recovery >94% ASTM C 957
C.System Modifications for Bridge Substructures Supply the elastomeric coating system with an aliphatic polyurethane top coat. When applied to bridge substructures, match the color to the color scheme shown on the Plans. If the Plans do not show a color scheme, use a color similar to Federal Color Standard No. 595B, Table VIII, Shade No. 36622. CONCRETE SU RFACE FINISH FOR STRUCTURES 737.05 785 737.04 ANTI -GRAFFITI COATIN G SYSTEM
A.General Provide a non -sacrificial anti -graffiti coating system that forms a barrier over new o r existing concrete surfaces that allows for the removal of graffiti without leaving graffiti shadows or ghosts. Provide anti -graffiti coating system components from a single manufacturer. Ensure that the anti - graffiti coating is pigmented to the proper color and is applied in a one coat system when a colored surface is required on the project plans. Apply the surface preparation and coating system in accordance with the manufacturer’s recommendations, except that the coating must be sprayed and not appl ied by polling or brushing. Provide a system field tested and approved by the Materials Division or its representative, along with a Type A certification, to the Resident Engineer for acceptance.
B.Physical Properties
1.Level 1 Coating Provide a non-sacrificial anti -graffiti coating system that meets the testing requirements of ASTM D7089 with a cleanability Level 1 (graffiti completely removed with high -pressure cold water wash) for field evaluation by the ODOT Materials Division or its represent ative. All costs of field testing will be at the coating manufacturer’s expense. Ensure the non -sacrificial anti -graffiti coating system shows the same level of cleanability for a minimum of 10 cycles of marking and cleaning. When a pigmented system is required in the plans, use laminar silicates, titanium dioxide, inorganic oxides, and other mineral pigments and toning. Use of organic pigments, vegetable or marine oils, paraffinic materials or stearates in the formulation are not permitted.
2.Level 2 Coating Provide a non -sacrificial anti -graffiti coating system that forms a barrier over an existing concrete surface that allows for the removal of graffiti in accordance with ASTM D6578 with a cleanability Level 2.
737.05 Opaque Sealers and S Tains
Provi de opaque sealer and stain coating systems that are solvent -borne stain -type coatings capable of waterproofing as well as coloring finished concrete. These coatings consist of a blend of acrylic and silicone resins and toning pigments suspended in solutio n at all times by a chemical suspension agent and solvents. Use laminar silicates, titanium dioxide, inorganic oxides, and other mineral pigments and toning. Use of organic pigments, vegetable or marine oils, paraffinic materials, or stearates in the for mulation are not permitted. Provide a coating system capable of being coated with itself or other solvent -borne coatings without special surface preparation being necessary.
739.01 Electrical Conductors
786 SECTION 738 ELECTRICAL CONDUCTORS
738.01 Traffic Signal Wire and Cable
Provide traffic and signal electrical cable in accordance with IMSA 19-1 or 20 -1, size 14 AWG. Provide shielded loop detector lead -in cable in accordance with IMSA 50-2, size 14 AWG. Provide loop detector wire in accor dance with IMSA 51-5, size 14 AWG.
738.02 Building and Highway Lighting Wire and C Able
Provide AWG sized NEC wire, Type XHHW -2 or Type THHN building wire and cable with copper conductors, rated for 600 V. Provide AWG sized NEC wire, Type XXHW -2 or Type TTHN underground wire and cable with copper conductors. Provide AWG sized NEC wire, Type XHHW -2 or Type THHN aerial wire and cable with a conductor material that is best suited for the service intended.
738.03 Communication Wire A Nd Cable
Provide underground communication wire and cables in accordance with IMSA 20-2 or REA -22. Provide overhead communication wire and cable in accordance with IMSA 20-4. SECTION 739 PULL BOXES
739.01 Precast Concrete Pul L Boxes
A.Concrete Prov ide concrete mixture designed to have a compressive strength of 3,000 psi [20.7 MPa] in accordance with AASHTO T 22.
B.Reinforcement Provide wire reinforcement in accordance with AASHTO M 32 or AASHTO M 225.
C.Cover Provide a gray iron casting cover in a ccordance with Subsection 725.03, “Iron Castings.” Ensure the cover has a non -slip surface and two, ⅜ in [9.5 mm] pent head brass bolts and nuts.
Source: Oklahoma Standard Specifications for Highway Construction, 2019 Edition. Pages 796–799 of 935.