SECTION 808 — CAST-IN-PLACE STRUCTURE CONCRETE MASONRY 800-55 — CAST-IN-PLACE STRUCTURE CONCRETE MASONRY
808.01 Description.
This work includes providing cast-in-place concrete in bridges, walls, culverts, and other miscellaneous structures at the required locations. The work includes structures constructed by cast-in-place methods using either plain or reinforced concrete or a combination.
808.02 Materials.
Concrete. Use materials that conform to SECTION 601. Joint Fillers and Sealants. Use materials that conform to: • Subsection M02.10.1 ● Subsection M02.10.4 • Subsection M02.10.2 ● Subsection M02.10.5 • Subsection M02.10.3
808.03 Construction Methods.
General. Comply with SECTION 601 for classification, proportioning, batching, mixing, transportation, placing, curing, and testing of concrete. Footings. Prepare foundations that conform to SECTION 203. Do not place concrete until the Engineer has approved the depth and dimensions of the excavation, the character of the material , and the condition of the foundation. Do not support a footing partially on rock and partially on soil. Excavate the rock to allow the placement of 12 in. of gravel according to Subsection 203.03.1. The Engineer may direct, in writing, changes in dimensions or elevations of footings as may be necessary to obtain satisfactory foundations. The Plans will be revised accordingly. For foundations under water, the Contractor is responsible for quality control, which may require a diver to inspect and monitor the construction of the foundation. Falsework and Centering. Ensure that all falsework or centering is adequate for the type of construction involved and conforms to Section 3-2, Falsework and Forms, of the currently adopted edition of the AASHTO LRFD Bridge Construction Specifications. Submit all Shop Drawings for falsework and centering, including design computations signed and sealed by the Contractor ’s Rhode Island Registered Professional Engineer, according to Subsection 105.02.
Part 800 — Bridge Structures August 2025
800-56 SECTION 808 — CAST-IN-PLACE STRUCTURE CONCRETE MASONRY The Contractor’s Professional Engineer shall certify in writing that the falsework system has been assembled and constructed according to the approved falsework drawings . Do not place loads on the falsework before submittal of the certification. When structures will be constructed over railroad tracks, ensure that the centering conform s to the requirements of the railroad company for temporary operating clearances, safety, and design. Forms.
a.General. P repare detailed plans for all required forms, including design computations signed and sealed by the Contractor ’s Rhode Island Registered Professional Engineer , according to Subsection 105.02. The Engineer will approve the plans in writing before any work is initiated on construction of the forms. Do not use snap ties, and ensure that removable cones meet the minimum diameter requirement. Where forms will be suspended from the structural steel girders, do not use snap tie hangers, wires, or other devices that cannot be adjusted to provide mortar tight joints. Do not allow slab forms to bear on interior diaphragms. Do not install forms over steel supporting members until after the steel erection and touchup painting is completed. Include a provision in the form for a standard ¾-in. symmetrical chamfer at all square entrant concrete corners.
b.Wood Forms. Construct all face forms of lumber ¾ in. or more in thickness lined with plywood not less than 1¼ in. in thickness. Sheet metal ( preferably noncorrosive) of approved gauge may be substituted. As an alternative method of construction, face forms may consist of plywood, ⅝ in. or more in thickness, without backing boards if properly designed and supported. Ensure that the alternative construction provides a rigid form that prevents unacceptable deformations in the finished concrete surface. Provide plywood forms that are tempered or waterproofed at the time of manufacture to prevent the absorption of moisture. When lining is used, use wood forms that require the usual construction with the boards closely spaced. Provide the lining in sheets of maximum useable size, and apply the smooth side to the concrete. Tape or fill joints between panels to provide a smooth, tight form surface. Construct metal ties or anchorages that are required within the forms to hold them to correct alignment and location so that the metal work can be removed to a depth of at least 2 in. from the exposed surface of the concrete without causing injury to the surface by spalling or otherwise. When permitted for secondary forms, cut back all wires, upon removal of the forms, at least ½ in. from the face of the concrete with sharp chisels or nippers. Use all fittings for metal ties of a design that, upon their removal, the cavities that remain are of the smallest size. Fill the cavities with cement mortar of fine aggregate and cement
Part 800 — Bridge Structures August 2025
SECTION 808 — CAST-IN-PLACE STRUCTURE CONCRETE MASONRY 800-57 in the proportion that has been employed for the class of concrete treated. Ensure that the surface is smooth, even, and uniform in color. Ensure that formwork lines are straight and true and that forms are mortar tight, well tied, and braced to prevent bulging. Ensure that block shims or wedges are secured before placing concrete. Treat formwork with a form release agent approved by the Engineer just before placing concrete. Use a form release agent that will not discolor or otherwise injuriously affect the concrete surface or subsequent finish. Apply release agents to the forms before the reinforcement is placed. Remove all excess release agent from the face surfaces, and clean the ties and reinforcement with an approved solvent where necessary.
c.Metal Forms. Use the applicable requirements for wood forms that apply to metal forms. Use a metal for forms that is of such thickness that the forms will remain true to shape. Ensure that all bolt and rivet heads are countersunk. Use c lamps, pins , or other connecting devices that are designed to hold the forms rigidly together and to allow removal without injury to the concrete. Do not use m etal forms that do not present a smooth surface or line up properly. Keep metal forms free from rust, grease, or other foreign matter that will discolor the concrete. Placing Concrete (Conventional Method).
a.General. In preparation for the placing of concrete, remove all sawdust, chips, standing water, and other construction debris and extraneous matter from the interior of forms. Remove struts, stays, and braces serving temporarily to hold the forms in correct shape and alignment, pending the placing of concrete at their locations, when the concrete placing has reached an elevation rendering their service unnecessary. Remove t hese temporary members from the forms . Cut back any hardware allowed to remain in the formwork to the design cover for reinforcement. Fill the resulting recess in the concrete surface with a patching mortar that matches the concrete color approved by the Engineer. Notify the Engineer 48 hours in advance of placing concrete to provide ample time for the inspection of forms, steel reinforcement, materials , and equipment. Submit a plan for concrete washout to ensure that there is a sufficient volume and an appropriate location before starting concrete placement operations. Place and consolidate concrete to not cause segregation of materials or displacement of reinforcement and to provide a dense homogeneous concrete that is free of voids and rock pockets. If the quality of the concrete is inadequate, stop work immediately until the quality issue has been resolved to the satisfaction of the Engineer. Use metal or metal-lined open chutes. Where steep slopes are required, ensure that the chutes are equipped with baffles erected in short lengths to slow the movement of concrete. Ensure that each part of the form is filled by depositing the concrete as near to its final position as practical.
Part 800 — Bridge Structures August 2025
800-58 SECTION 808 — CAST-IN-PLACE STRUCTURE CONCRETE MASONRY Do not drop concrete more than 5 ft. Use a tube with a hopper head or other approved device to prevent segregation of the mix and splattering of mortar. Ensure that all chutes and pipes remain clean and free from coatings of hardened concrete by flushing with water after each run . For washout of chutes and pipes only, direct the concrete into an appropriate concrete washout area. Otherwise, properly dispose of any leftover concrete. Consolidate concrete by mechanical, high frequency internal or external vibrators, or both, as acceptable to the Engineer. Equip handheld vibrators with rubber tipped heads when used to consolidate around the reinforcement. Ensure that the vibration at any point has sufficient duration to accomplish thorough consolidation but not be prolonged to cause segregation or bleeding. Do not use vibration directly to or through the reinforcement to sections or layers of concrete that have hardened so that the concrete ceases to be plastic under vibration. Do not use vibrators to transport concrete within the forms. Continuously place concrete in horizontal layers to prevent separation planes. When less than a 12-in. layer is placed in one operation, terminate the layer in a vertical bulkhead. Place and consolidate each layer before the preceding course has taken initial set to avoid the formation of a cold joint. If the placing of concrete is temporarily delayed, cover the concrete immediately and keep moist to retard initial set until placement can resume. If placing of concrete is temporarily discontinued, form a construction joint immediately. Do not allow any cold joints. Clean laitance and other objectionable material from the new construction joint when placement is scheduled to resume. To avoid visible joints as practical upon exposed faces, smooth the top surface of the concrete adjacent to the forms with a trowel. Where a feather edge might be produced at a construction joint, as in the sloped surface of a wingwall, use an inset form to produce a blocked out portion in the preceding layer that produces an edge thickness of not less than 6 in. in the succeeding layer. Do not discontinue work within 18 in. of the top of any face, unless provision has been made for a coping less than 18 in. thick. In this case, and if permitted by the Engineer, the construction joint may be made at the underside of the coping. Immediately following the discontinuance of placing concrete, remove all accumulations of mortar splashed upon the reinforcing steel and the surface of forms. Do not puddle dried mortar chips and dust into the unset concrete. If the accumulations are not removed before the concrete becomes set, do not damage or break the concrete steel bond at and near the surface of the concrete while cleaning the reinforcing steel.
b.Vertical Members . Place and allow to set and settle the c oncrete for columns, substructure, culvert walls, and other similar vertical members for a sufficient amount of time before the concrete for integral horizontal members, such as caps, slabs, or footings, is placed. Ensure that the time is adequate to allow completion of settlement due to loss of bleed water. This is not less than 12 hours for vertical members over 15 ft in height and not less than 30 minutes for members over 5 ft but not over 15 ft in height. When friction
Part 800 — Bridge Structures August 2025
SECTION 808 — CAST-IN-PLACE STRUCTURE CONCRETE MASONRY 800-59 collars or falsework brackets are mounted on the vertical members, ensure that the vertical member is in place at least seven days and has attained its specified design strength before loads from horizontal members are applied.
c.Slabs. Before any slab concrete is placed, have access to an approved finishing tool for striking off the surface of the slab to the required crown. For bridge deck slabs, refer to SECTION 814.
d.Superstructure. Do not place any concrete in the superstructure until the substructure has reached its specified design strength and the substructure forms have been stripped sufficiently to determine the character of the supporting substructure concrete. Concrete for T-beam or deck girder spans with depths less than 4 ft may be placed in one continuous operation or may be placed in two separate operations ― first, to the top of the girder stems and, second, to completion. For T-beam or deck girder spans with depths 4 ft or more and, unless the falsework is non-yielding, place the concrete in two operations. Ensure that at least five days have elapsed after placement of stems before the top deck slab is placed.
e.Arch Rings. Place the concrete in arch rings to load the centering uniformly. Cast a rch rings and ribs preferably in a single continuous operation. However, with the approval of the Engineer, the arch rings and ribs may be divided by radial bulkheads into transverse sections of a size that each section can be cast in a continuous operation. The arrangement of the sections and the sequence of placing will be approved by the Engineer. Ensure that the arrangement does not distort the centering and consequent creation of initial stress in the newly placed concrete or its reinforcement. Bond t he sections together by suitable keys. Where special key sections are required, mix the concrete as dry as practical and consolidate by vibration. Do not cast the spandrel walls or columns and the beams until after the centering is struck . Do not cast any part of the coping, railing, or floor until the spandrel walls or columns are complete. Where casting spandrel wall elements on newly constructed arch rings, ensure that the concrete has reached its required compressive strength before casting.
f.P lacing Concrete Under Water . Do not place concrete under water except with the approval of the Engineer and under his/her supervision. In this case, the method of placing will be as specified. Ensure that concrete placed under water conforms to Subsection 601.02.1. Use a tremie to place concrete in water and do not disturb after placement. Maintain still water at the point of placement and ensure that the forms under water are watertight. For parts of structures under water, when practical, place concrete seals continuously from start to finish. Always keep the surface of the concrete as nearly horizontal as practical. To ensure thorough bonding, place each succeeding layer of a seal before the preceding layer has taken initial set. Provide a tremie that includes a tube having a diameter of not less than 10 in., constructed in sections having flanged couplings fitted with gaskets. Support the tremies to permit free movement of the discharge over the entire top surface of the work to permit rapid lowering
Part 800 — Bridge Structures August 2025
800-60 SECTION 808 — CAST-IN-PLACE STRUCTURE CONCRETE MASONRY when necessary to retard or stop the flow of concrete. Close t he discharge end with a foot valve when work is initiated to prevent water from entering the tube. Seal all joints so that the concrete may be discharged into the empty tube. Ensure that the tremie tube remains full to the bottom of the hopper. When a batch is dumped into the hopper, induce the flow of concrete by slightly raising the discharge end but always keeping the flow in the mass of plac ed concrete. Ensure that t he flow is continuous until the work is completed. Do not proceed with dewatering until seven days after completion of the pour. Perform the dewatering to comply with SECTION 208. Remove all laitance or other unsatisfactory material from the exposed surface by scraping, chipping, or other means s o that the surface of the concrete will not be damaged.
g.Concrete Exposed to Sea Water . Do not place any construction joints where they are exposed to sea water.
h.C old Weather Concrete . Ensure that concrete operations during cold weather conform to Subsection 601.03.5.
i.H ot Weather Concrete . Ensure that concrete operations during hot weather conform to Subsection 601.03.6. Placing Concrete by Pumping (Optional Method).
a.Pumping. Placement of concrete by pumping will be permitted as approved by the Engineer. Arrange the equipment so that no vibrations result that might damage freshly placed concrete. Ensure a pump operation that provides a continuous stream of concrete without air pockets . When pumping is completed, eject the concrete remaining in the pipeline, if such will be used, so that there will be no contamination of the concrete or separation of the ingredients.
b.H andling and Placing Concrete . Place concrete to avoid segregation of materials and displacement of reinforcement. Before the placement of concrete, the Engineer may require the Contractor to demonstrate the capability of the equipment to both convey the concrete mixture and maintain the specified quality. No further verification of the equipment’s capability will be required unless evidence of nonuniform concrete is observed by the Engineer during placement. Do not allow c oncrete to contact aluminum during conveying and placing operations. When concrete pumps are used, ensure that the lines have a minimum diameter of 5 in. Keep all chutes, troughs, and pipes clean and free from coatings of hardened concrete by flushing with water after each run; properly dispose of water used for flushing clear of the concrete already in place. Use a concrete washout to flush chutes, troughs, and pipes only. Properly dispose of all other leftover concrete. Do not drop concrete more than 5 ft or deposit a large quantity at any specific point and then run or work it along the forms.
Part 800 — Bridge Structures August 2025
SECTION 808 — CAST-IN-PLACE STRUCTURE CONCRETE MASONRY 800-61 Fill each part of the form by depositing concrete directly in the form as close to its final position as practical; to work the coarser aggregates back from the face of the concrete; and to force the concrete under and around the reinforcement. After the concrete has taken its initial set, avoid jarring the forms or placing any strain on the ends of projecting reinforcement.
c.Design Mix. As an option, submit for approval by the Engineer a pump mix design formula of the concrete mixture for use with the specific pumping equipment. Ensure that t he concrete mixture complies with Subsection 601.03.1.
d.P lacing Concrete Under Water . Place concrete under water continuously from start to finish. Keep the surface of the concrete as horizontal as practical. To ensure bonding, place each succeeding layer of seal before the preceding layer has taken initial set. For large pours, use more than one tremie or pump to ensure compliance with this requirement. Expansion, Contraction, and Construction Joints. The following applies to concrete joints: • General. Joints may be filled or open. Filled joints may be the poured type or filled with a premolded filler. Subsection M02.10 specifies materials for joint fillers and sealants. • Fl ashing and Water Stops . Splice, weld, or solder metal flashing or flexible water stops to form continuous watertight joints that conform to SECTION 812. • C onstruction Joints . T o reduce the size of pours or for other construction reasons, additional joints may be provided at locations approved by the Engineer. Ensure that all bonded construction joints obtain a bond between subsequent placements. Chip and clean all laitance and debris from the surface of the hardened concrete. Clean the contact areas, moisten with water, and cover with a coating of mortar or neat cement grout. Place the new concrete before the grout has attained its initial set and carefully spade into position. Use shear keys, steel dowels, or inclined reinforcement approved by the Engineer where necessary to transmit shear or to bond the two sections together. • Contraction Joints . Use a bond breaker material approved by the Engineer with contraction joints. • E xpansion Joints . Clean j oints to be sealed of all foreign matter. Apply j oint fillers according to Subsection 808.03.8. Joint Fillers and Sealants. For all the following, use a joint filler or sealant that is on the RIDOT Approved Materials List.
a.Preformed Polyethylene Foam Joint Filler. ● Preparation. Ensure that joints are dry and cleaned of all deleterious material before placing the joint fillers and sealants.
Part 800 — Bridge Structures August 2025
800-62 SECTION 808 — CAST-IN-PLACE STRUCTURE CONCRETE MASONRY ● Installation. Install t he preformed joint filler according to the manufacturer ’s recommendations.
b.P olyurethane Joint Sealant . ● Preparation. Clean all joints of contaminants and impurities to the depth at which the sealant (and backer rod if detailed) will be installed. Ensure that the operation provides a sound, clean, and frost-free surface for sealant application. Blow out all dust, loose particles, and other debris with oil free compressed air. Install an expanded closed cell polyethylene foam rod backup material in joints, or install an approved bond breaker tape if on the Plans. ● Application. A pply a primer to the concrete surfaces of the joints. Use a primer according to the recommendation of the sealant manufacturer and do not apply the primer to the backup rod or the bond breaker tape. Apply the polyurethane joint sealant in conformance with the manufacturer ’s recommendations and, in no case, thicker than ½ in. Ensure that the approximate width to depth ratio of 2:1 for working joints. Tool the joint so that it is slightly concave. A soap solution may be used as a tooling aid.
c.Polyurethane Elastomeric Joint Sealant. ● Preparation. The preparation requirements for this sealant are identical to those specified above in Para. b.1 of this Subsection for Polyurethane Joint Sealant. ● Application. A pply a primer to the concrete surfaces of the joints. Ensure that t he primer is according to the recommendation of the sealant manufacturer and is not applied to the backup rod or the bond breaker tape. Apply the polyurethane elastomeric joint sealant according to the manufacturer ’s recommendations. Do not apply the sealant to joints less than ¼ in. in width. Provide an approximate width to depth ratio of 2:1 for working joints. The application temperature range is 40°F to 100°F. Tool the joint so that it is slightly concave. A soap solution may be used as a tooling aid. Clean up any spillage immediately according to local regulations and the directions of the Engineer.
d.Silicone Joint Sealant. Use silicone joint sealants, either on the AML or with the Engineer’s approval, according to the manufacturer’s recommendations.
Part 800 — Bridge Structures August 2025
SECTION 808 — CAST-IN-PLACE STRUCTURE CONCRETE MASONRY 800-63 Curing Concrete. Ensure that Portland cement concrete is cured according to Subsection 601.03, except ensure that all placements designated as mass concrete meet the requirements of SECTION 607. Removal of Forms, Falsework, and Centering. In general, do not remove forms for slabs, beams, pier caps, and other support members until the concrete has reached the specified 28-day strength as indicated by the compression tests of field- cured cylinders fabricated and tested by the Contractor. To facilitate finishing, side forms carrying no load may be removed after 24 hours if approved by the Engineer. Continue the wet curing process for the remainder of the 14-day wet curing period at no additional cost to the Department. The following Table presents the minimum strength requirements for the removal of formwork , placement of loads, and placement of backfill. Structural Element Removal of Formwork Placing Superimposed Vertical Dead Loads* Placement of Backfill Strength (%f′c) Strength (%f′c) Strength (%f′c) Subfoundation Concrete 20 30 20 Cast-in-Place Concrete Piles N/A 50 N/A Footing 30 40 30 Abutment Wall, Rigid Frame Wall, and Box Culvert Wall 30 50 95 Piers/Columns 30 50 N/A Drilled Shaft Above Grade 55 60 N/A Pile Cap and Pier Cap 50 60 50 Arch (Span ≤ 65 ft) (BF) 40 95 95 Arch (Span ≤ 65 ft) (SF) 30 Concrete Beam (BF) 60 80 N/A Concrete Beam (SF) 30 Slab (Span ≤ 10 ft) and Diaphragms** 30 85 95 Slab (Span > 10 ft)** 50 Bridge Decks *** 85 N/A Retaining Wall, Headwall, and Wingwall 30 30 95 Parapet Wall, Curb, and Backwall 20 20 50 BF – bottom form SF – side form * Examples are placement of parapets on slabs, placement of walls on footings, a nd placement of beams on pier caps. ** Slab includes slab type bridges, box culvert top slabs, rigid frame top slabs, approach slabs, moment slabs, and sleeper slabs. *** Leave all forms in place without loosening for seven uninterrupted calendar days.
Part 800 — Bridge Structures August 2025
800-64 SECTION 808 — CAST-IN-PLACE STRUCTURE CONCRETE MASONRY Cure the Quality Control cylinders that are cast for the specific use as cylinder strength testing for form removal in the field under the same conditions as the placed structure concrete according to AASHTO T23/R100. Test the cylinders to determine concrete strength before removing forms or placing loads on the concrete. Do not strike falsework and centering for filled arches until fills behind the abutments have been placed up to the spring line. Do not remove falsework supporting the deck of rigid frame structures until fills have been placed behind the vertical legs according to Subsection 203.03.5. Gradually and uniformly lower centers to avoid excessive stresses in any part of the structure. In arch structures of two or more spans, the sequence of striking centers will be specified by the Engineer. Strike arch centering and ensure that the arch is self-supporting before the railing or coping is placed. Concrete Finishes.
a.General. Ensure that finishes for concrete bridge decks placed by self-propelled machines conform to SECTION 814. Otherwise, apply finishes to different types of surfaces as follows: ● Float Finish. Tops of walls, piers, abutments, parapets, safety walks, sidewalks, and medians. ● Rubbed Finish. All exposed surfaces visible in elevation to 1 ft below final ground line and the underside of concrete slabs outside of the fascia beam. ● Bush-Hammered or Sand Blasted. As shown on the Plans.
b.Float Finish. Achieve float finish for horizontal surfaces by placing excess concrete in the forms and striking it off with a template or screed, forcing the coarse aggregate below the surface. Finish the surface with a wooden float to a smooth true plane. Finish the area under bearing plates as practical to ⅛ in. above the final elevation and then dressed to a uniform level bearing with a carborundum brick or power grinder after the concrete has sufficiently set.
c.R ubbed Finish. After the concrete has hardened, saturate the surface with water and rub using a medium -coarse carborundum stone with a small quantity of mortar on its face. Approved bonding agents may be used. Use mortar consisting of cement and fine sand in the same proportions used in the concrete being rubbed. Continue rubbing until all form marks, projections, and irregularities are removed, all voids filled, and a uniform surface is obtained. Keep the paste produced by rubbing moist and allow it to set for at least five days. Smooth the surface by rubbing with a fine carborundum stone and water. Rub to produce a smooth texture and uniform color over the entire surface. After the final rubbing is complete and the surface has dried, rub the entire surface with burlap to remove loose mortar. Ensure
Part 800 — Bridge Structures August 2025
SECTION 808 — CAST-IN-PLACE STRUCTURE CONCRETE MASONRY 800-65 that the finished surface does not have unsound patches, paste, powder, or objectionable marks.
d.Bushhammered or Sandblasted Finish. Before finishing any concrete, cast a test panel approximately 4 ft × 4 ft in a vertical position with a joint in the form work near approximately the middle of the panel and demonstrate the proposed method. This method will be approved by the Engineer before use. If the first trial panel does not produce satisfactory results, cast one or more trial panels until a satisfactory finish is obtained. Cure the surfaces to be finished. After the forms have been removed, patch all holes with an approved mortar that complies with Subsection M04.03.5 , and remove any fins or other protuberances to present a roughly even surface. Do not initiate any finishing until the concrete has attained its specified 28-day strength. When finishing bevels or corners, do not damage the lines. After the surfaces are finished, remove all dust and loose particles by brushing with stiff wire brushes or air blasting.
e.Concrete Architectural Treatment Form Liner Finish. The architectural treatment is achieved using form liners. Use form liners that are attached to the concrete formwork and are of the single-use type from the same manufacturer. Provide evidence to the satisfaction of the Engineer that the products and their installation have been successfully used in similar applications. Before construction, present a sample panel to the Engineer that includes a butt joint to ensure that the form liner panels produce a consistent surface pattern and appearance without visible seams. Provide a sample panel that has a minimum size of 5 sq ft. Submit Shop Drawings for the concrete architectural treatment system according to Subsection 105.02 . The Engineer will review the Shop Drawings and samples for compliance with the specifications. Apply the concrete architectural treatment to the exterior face of concrete surfaces within the required limits to a minimum of 1 ft below the finished grade. Apply form liners per the manufacturer’s recommendations and according to the following provisions: ● Mate form liners with the adjacent panels to produce a consistent pattern, and place adjacent liners to each other with a ⅛ -in. seam or less. Attach t he form liners to the forms per the manufacturer ’s recommendations. Coordinate wall ties with the form liner system. ● Ensure that form liners are rigid and capable of withstanding the anticipated concrete placement pressures without leakage, which could cause physical or visual defects, and are able to be removed without causing concrete surface deterioration or weakness in the substrate. Ensure that form release agents, form stripping methods, patching materials, and related construction materials are compatible with all other elements of concrete architectural treatment.
Part 800 — Bridge Structures August 2025
800-66 SECTION 808 — CAST-IN-PLACE STRUCTURE CONCRETE MASONRY ● Blend form liner butt joints into the approved pattern. Ensure that no visible vertical or horizontal seams or conspicuous form marks are created by butt -joined form liners. Ensure that t he finished concrete surface has the required finished texture and continuous pattern. ● The Engineer must approve the use of wall ties that result in a portion of the tie being permanently embedded in the concrete before initiating work. Provide wall ties with break setbacks of 1 in. minimum from the finished concrete surface. Place the wall tie holes in the high point of the rustication or mortar joint. Fill any voids left from snapped off wall ties with an approved color matching mortar patch. ● Place concrete according to Subsection 808.03.5 with an emphasis on the proper vibration of the concrete next to the form liner to ensure that no honeycombs or other deficiencies occur in the face of the concrete. ● After stripping the forms and form liners, clean the concrete surface to ensure that it is free of all laitance, dirt, dust, grease, release agents, efflorescence , and any other foreign or deleterious materials. ● Do not use sandblasting to clean concrete surfaces; use pressure washing with water for removing laitance. When pressure washing will be used, perform the work according to SECTION 815. Ensure that the completed surface is free of blemishes, discolorations, surface voids greater than ⅜ in. in diameter, and conspicuous form marks. Ensure that t he cleaning process does not diminish the rustic appearance created by the form liner. Ensure that inlet protection is in place and properly maintained. Provide m aterials that are prepared, applied, cured, and stored according to the product manufacturers’ directions. When directed by the Engineer, provide the manufacturer’s technical representatives to answer questions and/or make recommendations before and during the work operations.
808.04 Method of Measurement.
Structure Concrete Masonry will be measured by the number of cubic yards of concrete provided.
808.05 Basis of Payment.
The Department will pay for the completed and accepted quantities as follows. Pay Item Pay Unit Structure Concrete Masonry CY Payment at the Contract unit price is full compensation for all resources, labor, materials, equipment, and incidentals required to finish the work, complete and accepted.
Part 800 — Bridge Structures August 2025
SECTION 808 — CAST-IN-PLACE STRUCTURE CONCRETE MASONRY 800-67 Unless otherwise included for payment under a specific item, Joint Fillers, Joint Sealants, and Concrete Finishes are incidental to Structure Concrete Masonry and are not paid separately. The use of a diver for required Contractor Quality Control is incidental to the work being performed and is not paid separately. Concrete finishes are incidental to the work being performed and are not paid separately.
Referenced in this section
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Source: Standard Specifications for Road and Bridge Construction (Blue Book), 2022 (Aug 2025 compilation) Edition. Pages 424–436 of 951. View official source ↗