825 - CURB AND GUTTER
800-72 Repair any damage to the existing structure due to the negligence on the part of the Contractor at own
expense. Replace using one of the 2 methods shown below:
1.Standard, Conventional Method. Repair concrete by standard, conventional procedures as shown in the Contract Documents. Use Grade 3.0 concrete for repairing curbs unless s hown otherwise in the Contract Documents. Apply concrete adhesive to existing surfaces prior to placing new concrete, as de signated in the Contract Documents.
2.Concrete Surface Repair-Shotcrete Met hod. Repair the concrete, adhering to SECTION 826 . Either the wet mix or dry mix process may be used. 825.4 MEASUREMENT AND PAYMENT Excavation for the construction of the various types of curbs and gutters will not be measured separately for payment, but will be considered subsidiary work, except when such excavation may be considered as a part of, and may be measured in conjunction with the roadway excavation. In such instances, the excavation will be included in the quantity of roadway excavation computed as a line item on the contract according to DIVISION 200 . The Engineer will measure the various types of curbs and gutters, and combination curb and gutter by the linear foot along the face of the curb. Type I and II combined curb and gutter will not be measured separately, but the Engineer will measure together as linear feet of combined curb and gutter. The Engineer will measure gutter by the linear foot along the flowline. The Engineer will not measure asphalt material or aggregate required to construct the work. Payment for "Curb, Edge", "Curb, Header", "Curb and Gutter, Combined", "Gutters", "Curb, Protection", "Curb, Asphaltic Concrete", "Gutters, Asphaltic Concre te", "Curb and Gutters, Asphaltic Concrete" and "Curb Repair" at the contract unit prices is full compensation for the specified work. 826 – CONCRETE SURFACE REPAIR
800-73 Section 826
CONCRETE SURFACE REPAIR 826.1 DESCRIPTION Remove the unsound concrete surface and replace the concrete according to the details in the Contract Documents. B I D I T E M U N I T S Concrete Surface Repair Square Foot Note: If this bid item is not included in the Contract Docume nts, this work is subsidiary to other items in the contract. 826.2 MATERIALS Provide materials that comply w ith the applicable requirements. Concrete ................................................................................................................. SECTIONS 401 & 402 Aggregates for Concre te Not On Grade ................................................................ SECTION 1102 Concrete Curing Materi als .................................................................................... DIVISION 1400 Reinforcing Steel for Concrete .............................................................................. DIVISION 1600 Fibrous Reinforcemen t for Conc rete ..................................................................... DIVISION 1700 Shotcrete Co ncrete ................................................................................................ DIVISION 1700 Rapid Set Concrete Pa tching Material* ................................................................. DIVISION 1700 *When specified in the Contract Documents.
a.When specified, provide one of the following types of concrete:
1.Formed. Use Grade 4.0 (AE)** concrete that complies with SECTION 401 . Provide concrete with slump that is appropriate for the inte nded use and acceptable to the Engineer.
2.Pneumatically Applied. Use Shotcrete concrete that complies with DIVISION 1700 and has a 28-day compressive strength of 4000 psi**. Wet or dry process is permitted.
3.Hand packed. Use Grade 3.5 (AE)** with the following exceptions:
a.Do not include any coarse aggregate (provide a concrete mortar). (b) Include fibers as specified in SECTION 1722 .
b.If no type of concrete is specified, provide either material in subsection 826.2a.(1) or (2). ** Unless otherwise shown on the plans. 826.3 CONSTRUCTION REQUIREMENTS Depending on the nature and size of the concrete su rface repair, the Engineer will designate the type of concrete used for the repair and the process used for the repair (such as formed and poured, hydraulically applied or hand packed) in the Contract Documents. Remove the unsound concrete to the limits designated in the Contract Documents or as directed by the Engineer. The maximum size of chipping hammer allowed for concrete removal is 15 pounds. Remove the existing concrete to a depth of 2½ inch (minimum), or deeper if necessary to expose sound concrete. Remove the existing concrete at least ¾ inch beyond any existing steel reinforcement exposed during the removal of the unsound concrete. Do not wedge the tip of the chipping hammer between the concrete and reinforcement during concrete removal. Do not impact directly on reinforcement. Debonding of concrete caused by such actions will be repaired at no cost to KDOT. Confirm reinforcement bond adjacent to the repair area. Do this by sounding concrete over the reinforcement in the presences of the Engineer prior to placement. Chip the perimeter edge of the repair area to near perpendicular (to the concrete surface). Do not feather the edge of the repair area. 826 – CONCRETE SURFACE REPAIR
800-74 Sandblast, then use compressed air (90 psi min) to clean the prepared repair area and exposed steel
reinforcement to remove all bond-inhibiting materials. Dampen the clean surface to a surface saturated dr y condition just prior to concrete placement. Place the repair concrete as specified in the Cont ract Documents. Match the lines of the existing surface unless shown otherwise in the Contract Documents. Cure the concrete as directed by the Engineer. Additional Requirements for Shotcrete: During the preconstruction meeting, demonstrate competence of the nozzleman by providing a copy of a current ACI Shotcr ete Nozzleman certificate for th e appropriate application. Apply the shotcrete according to th e manufacturer’s recommendations. Pr ovide the Engineer with a printed copy of the manufacturer’s recommendations. 826.4 MEASUREMENT AND PAYMENT When shown as a bid item in the contract, the Engineer will measure the concrete surface repairs by the square foot. If the bid item for this work is not included in the Contract Documents, the Engineer will not measure the concrete surface repairs for payment. Payment for "Concrete Surface Repair" at the contr act unit price is full comp ensation for the specified work. 827 - GUARDRAIL AND GUIDEPOSTS
800-75 Section 827
GUARDRAIL AND GUIDEPOSTS 827.1 DESCRIPTION Construct the designated type of guardrail and guidepost as shown in the Contract Documents. B I D I T E M S U N I T S Guardrail, Steel Plate Linear Foot G u a r d r a i l , C a b l e L i n e a r F o o t Guardrail, Removal of Steel Plate Linear Foot Guardrail, Removal of Cable Linear Foot Guardrail, Removal of Timber Linear Foot Guardrail, Reconstruction of Steel Plate Linear Foot Guardrail, Reconstruction of Cable Linear Foot Guardrail, Removal and Reconstruction of Steel Plate Linear Foot Guardrail, Removal and Reconstruction of Cable Linear Foot G u i d e p o s t s E a c h Guideposts, Removal of Each Guideposts, Resetting of Each Guideposts, Removal and Resetting of Each G u a r d r a i l P o s t s E a c h Guardrail End Terminal (*) Each Guardrail, Steel Plate (Temporary) Linear Foot * T y p e 827.2 MATERIALS Provide materials that comply w ith the applicable requirements. Posts ...................................................................................................................... DIVISION 2300 Preservative Treatment for Timber ....................................................................... DIVISION 2300 Wire Cable an d Fittings ......................................................................................... DIVISION 1600 Metal for Guardra il and Fitti ngs ............................................................................ DIVISION 1600 Paint ....................................................................................................................... DIVISION 1800 827.3 CONSTRUCTION REQUIREMENTS
a.General. When steel plate guardrail is shown in the Contract Documents, any one of the types of steel plate guardrail shown may be provided, but only one type may be used on a project.
b.Erection of Guardrail and Guideposts. Excavate holes for guardrail posts and guideposts to the required depth. Excavate holes to permit compaction of the backfill around the posts. Guardrail posts and guideposts may be set by driving. Use post caps that are designed to protect the post from detrimental crushing during the driving operations. If damaged or an unacceptable line and grade is obtained, excavate for the erection of the posts. Set posts plumb, firm and to lines and grades show n in the Contract Document s. Place backfill around the posts in thin layers and thoroughly compact. For the top of the backfill, use the same material of at least the same thickness as that used in construction of the shoulders at that point. Place and fasten guardrail cables, plates, shapes an d fittings as shown in th e Contract Documents. When guardrail is removed and reused on the project, thoroughly clean guardrail prior to erection. Punch or drill the guardrail to accommodate the revised post spacing as shown in the Contract Documents. When guardrail is required to be cut, make the cut by sawing. Treat all such holes and cuts with zinc dust paint. Install guardrail end terminals acco rding to the manufacturer’s requireme nts and the Contract Documents. 827 - GUARDRAIL AND GUIDEPOSTS
800-76 c. Removal of Guardrail or Guideposts. Carefully disassemble guardrail. Prevent undue injury to the
rail, fittings and posts. Remove guardrail posts an d guideposts without damage and store according to subsection 827.3f. at locations approved by the Engineer. The material will remain the property of the owner.
d.Reconstruction of Guardrail and Resetting of Guideposts. Guardrail and accessories to be reconstructed or guideposts to be reset will be provided by the owners from the project or a storage site as shown in the Contract Documents. Reconstruct the guardrail and reset the guideposts acco rding to the requir ements above for new guardrail and guideposts.
e.Removal and Reconstruction of Guardrail and Removal and Resetting of Guideposts. Comply with subsections 827.3c. and d. except that the Contractor is responsible fo r all materials and will replace at own expense any missing materials from the removal, material lost or damaged during the removal, storage or reconstruction.
f.Guardrail, Steel Plate (Temporary). Install guardrail according to this specification. Remove guardrail when directed by the Engineer, or as specified in the Co ntract Documents.
g.Storing Galvanized Guardrail. Store all galvanized rail elemen ts, end sections and accessories to prevent galvanic action. Do not store in direct contact with the soil. The material may be stored in the open, provided it is properly separated, stacked and drained. Protect galvanized surfaces which ha ve been abraded exposing the base metal, threaded portions of all fittings and fasteners and cut ends of bolts from moisture, soil or other damaging elements. The Contractor is responsible for the condition of the material in storage. 827.4 MEASUREMENT AND PAYMENT The Engineer will measure construction, removal, reconstruction or removal and reconstruction of guardrail by the linear foot. Each separate run of rail will be measured from center of end post to center of end post along the rail or may be determined by recording the number of standard length panels installed. The Engineer will measure each guidepost to be set, removed, reset or removed and reset. The Engineer will measure each guardrail post provided and set. The Engineer will measure each guardrail end termin al, including accesso ries, posts and hardware as a complete system. The Engineer will measure temporar y guardrail by the lump sum. The Engineer will not measure excavation and backfill fo r separate payment. These items are subsidiary to other items in the Contract Documents. Any required treatment shown in the Contract Documents for wood members is subsidiary to the item of reconstruction of steel plate guardrail. Payment for "Guardrail, Steel Plate", "Guardrail, Steel Plate (Temporary)", "Guardrail, Cable", "Guardrail, Removal of Steel Plate", "Guardrail, Removal of Cable", "Guardrail, Removal of Timber", "Guardrail, Reconstruction of Steel Plate", "Guardrail, Reconstructi on of Cable", "Guardrail, Removal and Reconstruction of Steel Plate", "Guardrail, Removal and Reconstruction of Cable", "Guideposts", "Guideposts, Removal of", "Guideposts, Resetting of", "Guideposts, Removal and Resetting of", "Guardrail Posts", and "Guardrail End Terminal" at the contract unit prices is full compensation for the specified work.
Source: Kansas Standard Specifications for State Road and Bridge Construction, 2015 Edition. Pages 563–567 of 978.