535.03 Surface Applied Penetrating Corrosion Inhibitors
526 SECTION 535
535.01 Description
This work consists of treating concrete surfaces with a penetrating corrosion inhibitor. The corrosion inhibitor is intended to treat reinforcing steel 1 to 3 in [25 to 75 mm] beneath concrete surfaces which have been contaminated with chlorides and may not be exposed at the time of treating.
535.02 Materials
Provide surface applied corrosion inhibitors that are organofunctional silane based. Use corrosion inhibitors that a re designed to work on both anodic and cathodic areas. Use surface applied corrosion inhibitors on the Materials Engineer’s list of approved products. Provide test data showing satisfactory test results from an approved independent testing laboratory as determined by the Materials Engineer for a surface applied corrosion inhibitor to be considered for inclusion on the list of approved products. Include the manufacturer’s name, test results and dates. Provide test results in accordance with FHWA RD -98-153 test protocol on crack slab black bars subjected to 48 weeks of cyclic salt water ponding. Show a 90% corrosion reduction using this test procedure.
535.03 Equipment
A.General Furnish equipment meeting the requirements of Subsection 108.06, “Methods and Equipment,” and the recommendations of the manufacturer of the corrosion inhibitor. Use spray equipment, brushes or rollers as recommended by the manufacturer.
B.Surface Preparation Equi pment With written approval from the manufacturer, any of the following may be used:
1.Abrasive Blasting Provide compressed air pressure type abrasive blasting equipment of proper size and capacity to clean concrete surfaces as specified.
2.Shot Blasti ng Provide portable type machine designed especially for cleaning horizontal concrete surfaces utilizing recyclable steel shot blast techniques.
3.Hot Water Pressure Washers Provide hot water pressure system for cleaning concrete surfaces as specified, u tilizing 160°F [70°C] minimum water temperature at 3,500 psi [25 MPa] nozzle pressure. SURFACE APPLIED PENETRATING CORROSION INHIBITORS 535.04 527 (4) Hydroblast Washer Provide high pressure cold water washer unit for cleaning concrete surfaces as specified, using 7,000 psi [50 MPa] nozzle pressure.
C.Application Use low -pressure spray equipment as recommended by the manufacturer.
535.04 Construction Methods
A.General Follow the manufacturer’s recommendations for surface preparation and application. Keep traffic off treated surfaces until the treated surfaces hav e completely dried.
B.Work Plan Submit to the Engineer before starting work, a work plan describing the treatment procedures to be used. Include the following in the work plan: The identification of the treatment system to be used by brand name, name o f manufacturers and a copy of the manufacturer’s unabridged application procedures A description of the surface preparation methods and equipment to be used A description of the application methods and equipment to be used Weather limitations
C.Surface P reparation Clean all concrete surfaces as specified by the corrosion inhibitor manufacturer to be treated before applying the penetrating corrosion inhibitor treatment system. Clean all exposed reinforcing steel. Remove all traces of curing compound, existing coati ngs, laitance, dirt, dust, salt, oil, asphalt, algae, moss, or any other foreign materials. Use equipment as approved by the corrosion inhibitor manufacturer and in accordance with Subsection 535.03.B, “Surface Prepa ration Equipment.” Provide a minimum profile in accordance with ICRI Guideline No. 03732 CSP -2 “Guideline for Selecting and Specifying Concrete Surface Preparation for Coatings, Sealers, and Polymer Overlay .” Obtain approval before from the corrosion inh ibitor manufacturer before using any cleaning agents, solvents, hand tools, or detergents. If a water method is used for cleaning, remove any standing water or excess moisture, which may delay surface drying or restrain surface penetration of the treatmen t system. Use brush, broom, sweeper or compressed air on surfaces as final cleaning before application.
D.Application
1.General Apply the corrosion inhibitor as shown in the Plans and as directed by the Engineer in accordance with the manufacturer’s re commendations. Apply corrosion inhibitor to an area at least one foot beyond the perimeter of the areas to be treated in all directions. Remove all traces of the inhibitor product remaining on the concrete surface prior to encasing, patching or applying FRP wraps.
535.04 Surface Applied Penetrating Corrosion Inhibitors
528 (a) Column and Pier Cap Concrete Encasements with a thickness greater than or equal to 3” [75 mm] Apply corrosion inhibitors to contaminated concrete before encasing concrete sections. Inhibitor may be applied directly to exposed reinforcement .
b.Concrete to Be Patched Without Encasement Apply corrosion inhibitor after the patches have been placed and the fresh concrete has been cured for at least 28 days.
c.FRP Wraps Apply corrosion inhibitor after the patches have been placed and the fre sh concrete has been cured for a minimum of 28 days.
2.Weather limitations Apply the penetrating corrosion inhibitor in accordance with the manufacturer’s recommendations and as follows: When the air and concrete surface temperatures are above 40°F [4°C] and less than 100°F [38°C] When the wind speeds are 15 mph [24 km/hr] or less When there has not been any precipitation in the last 72 hours Do not apply if the ambient temperature is expected to be below freezing within 12 hours of application. Do not a pply when precipitation will occur in less than 8 hours after application.
3.Fugitive Dye Add a fugitive dye to the corrosion inhibitor for visual field inspection.
4.Treatment Application Notify the Engineer at least one week before the application of treatment system so that the Engineer may inspect the work. Unless otherwise recommended by the manufacturer, apply two coats of corrosion inhibitor at a rate specified by the manufacturer. Apply inhibitor with a low - pressure spray equipment or as speci fied by the manufacturer. Apply additional coats as directed by the manufacturer’s technical representative and in accordance with the manufacturer’s instructions. Confirm application of the corrosion inhibitor using a black light and reapply inhibitor as necessary. Carefully rinse concrete surface to remove any remaining residue from the surface.
E.Sampling and Testing of Bridge Decks and Approaches Field test to verify penetration will be required for deck slabs and approach slabs. No field testing will be required for pier caps, columns, prestress beams, or reinforced concrete T -beams. For bridge decks only, test silane based inhibitors in accordance with Subsection 515.04.C, “Sampling and Testing of Bridge Dec ks and Approaches.” SURFACE APPLIED PEN ETRATING CORROSION INHIBITORS 535.06 529 F. Acceptance Silane based inhibitors for bridge decks will be accepted in accordance with subsection
515.04 D.(2), “Bridge Decks and Approach Slab Surfaces.”
535.05 Methods of Measureme Nts
Corrosion Inhibitor (Surface Applied) will be measured by the square yard [square meter] of treated concrete surface area.
535.06 Basis of Payment
The Department will pay for accepted quantities, measured as provided above, at the contract unit price for: Pay Item: Pay Unit: CORROSION INHIBITOR (SURFACE APPLIED) Square Yard [Square Meter] Payment will be considered full compensation for furnishing all materials, equipment, labor, testing, and incidentals necessary for mixing, delivery, storage, handling, surface preparation, and application. 531 CHAPTER 600 INCIDENTAL CONSTRUCT ION SECTION: PAGE NO.: SECTION 601 RIPRAP ................................ ................................ ................................ ........................... 533 SECTION 602 GABIONS AND REVETMENT MATTRESSES ................................ ................................ ....... 535 SECTION 603 STEEL JETTY BANK PROTECTION ................................ ................................ ...................... 540 SECTION 609 INTE GRAL CURB, COMBINED CURB AND GUTTER, BITUMINOUS CURB AND CONCRETE CURB ................................ ................................ ................................ ................................ ............... 542 SECTION 610 CONCRETE OR ASPHALT SIDEWALKS, DRIVEWAYS, DIVIDING STRIPS, AND TACTILE WARNING DEVICES ................................ ................................ ................................ .......................... 545 SECTION 611 MANHOLES, DROP OR CURB INLETS, AND JUNCTION BOXES ................................ ........... 548 SECTION 612 ADJUSTMENT OF EXISTING STRUCTURES ................................ ................................ ........ 553 SECTION 613 DRAINAGE CONDUITS ................................ ................................ ................................ .....555 SECTION 614 WICK DRAINS AND STRIP DRAINS ................................ ................................ ................... 563 Section 615 SANITARY SEWER PIPE CONDUITS ................................ ................................ .................... 566 SECTION 616 WATER PIPE AND FITTINGS ................................ ................................ ............................. 570 SECTION 619 REMOVAL OF BUILDINGS, STRUCTURES, AND OBSTRUCTIONS ................................ ........ 575 SECTION 620 REMOVAL OF UNDERGROUND STORAGE TANKS ................................ ............................. 579 SECTION 622 PIPE RAILING AND MISCELLANEOUS PIPE WORK ................................ ............................. 582 SECTION 623 GUARDRAIL AND END TREATMENTS ................................ ................................ ............... 583 SECTION 624 FENCES ................................ ................................ ................................ ........................... 587 SECTION 625 REMOVAL AND STORAGE OR RECONSTRUCTION OF FENCING AND GUARDRAIL .............. 593 SECTION 626 MONUMENTS ................................ ................................ ................................ ................. 595 SECTIO N 627 CONCRETE LONGITUDINAL BARRIER ................................ ................................ ............... 596 SECTION 628 HIGH -TENSION CABLE BARRIER ................................ ................................ ....................... 597 SECTION 629 MAILBOXES ................................ ................................ ................................ .................... 601 SECTION 640 FIELD OFFICE OR LABORATORY ................................ ................................ ....................... 604 SECTION 641 MOBILIZATION ................................ ................................ ................................ ............... 606 SECTION 642 CONSTRUCTION STAKING ................................ ................................ ............................... 608 RIPRAP 601.04 533 SECTION 601 RIPRAP
601.01 Description
This work consists of providing and placing riprap for slope protection. The Department defines the following types of riprap: Type I Plain, Type I -A Plain with Filter Blanket, Type II Special Plain, Type II -A Special Plain with Filter Blanke t, Type III Laid Up, or Type IV Grouted.
601.02 Materials
Provide the following materials in accordance with the following subsections: Material: Subsection: Portland Cement 701.02 Fine Aggregate 701.05 Filter Fabric 712.02 Stone for Riprap 713.01 Filter Blanket 713.02
601.03 Equipment — Vacant
601.04 Construction Methods
A.General Shape and dress slopes, ditches, and protected areas to the lines and grades shown on the Plans. If the Contract requires Type III or Type IV riprap, compact the base in accordance with Subsection 501.04, “Construction Methods,” before placing the riprap.
B.Filter Blanket Place the filter blanket in one or two layers, as shown on the Plans. If material is stockpiled at the job site, follow the procedures in accordance with Subsecti on 106.08, “Storage and Handling of Material. ” Uniformly spread each layer of filter blanket on the prepared base. If the blanket is damaged during placement, repair or replace before proceeding, at no additional cost to the Department. Finish the filter blanket to an even surface, free of mounds and windrows.
Source: Oklahoma Standard Specifications for Highway Construction, 2019 Edition. Pages 540–546 of 935.