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NEW YORK STATE DEPARTMENT OF TRANSPORTATION Sections 200 - 599 STANDARD SPECIFICATIONS (USC) January 1, 202 4 Volume 2 583-4 METHOD OF MEASUREMENT. The quantity to be paid for under this item will be the number of square feet of finished shotcrete installed. Measurement will be taken as the plane projection of the finished surface. Measurement shall be made prior to the placement of shotcrete.
583-5 BASIS OF PAYMENT. The unit price bid per square foot shall include the cost of furnishing all
labor, materials and equipment necessary to complete the work.
583-5.01 Removal of Structural Concrete - Replacement with Shotcrete. No Reinforcement Bar
Encasement. The unit price bid per square foot shall include the cost of furnishing all labor, materials and equipment necessary to complete the work.
583-5.02 Removal of Structural Concrete - Replacement with Shotcrete, Reinforcement Bar
Encasement. The unit price bid per square foot shall include the cost of furnishing all labor, materials and equipment necessary to complete the work, except that replacement of deteriorated reinforcement shall be paid for separately. Payment shall not be made until cores verify acceptability. Payment will be made under: Item No. Item Pay Unit 583.02 Removal of Structural Concrete - Replacement with Shotcrete, No Reinforcement Bar Encasement Square Foot 583.03 Removal of Structural Concrete - Replacement with Shotcrete, with Reinforcement Bar Encasement Square Foot SECTION 584 - SPECIALIZED OVERLAYS FOR STRUCTURAL SLABS
584-1 DESCRIPTION. Prepare the surfaces that will be in contact with slab reconstruction concrete and
place slab reconstruction concrete. Prepare the structural slab surface and place a specialized concrete overlay.
584-1.01 Scope. Concrete removal work will be paid for under the appropriate item(s). Minimum
thickness of overlay concrete is 1 1/2 inches . Include the cost of any grade changes necessitated by this requirement in the unit bid price for overlay concrete. Use only one type of overlay concrete on any one structure.
584-1.02 Definitions
A.Class DP Concrete. A homogeneous mixture of portland cement, fly ash, microsilica admixture, fine and coarse aggregates, air entraining agent, set retarding water reducing admixture and water.
B.Microsilica Concrete. A homogeneous mixture of portland cement, microsilica admixture, fine and coarse aggregates, air entraining agent, high range water reducing admixture and water.
C.Overlay Concrete. Concrete placed over existing and slab reconstruction concrete. Overlay concrete will be Microsilica concrete for Method 1 and Method 2, and Class DP concrete for Method 3, as described in 584 -1.03 Placement Methods.
D.Slab Reconstruction Concrete. Concrete placed completely around the exposed top mat of bar reinforcement. Slab reconstruction concrete will be Class D or Class DP concrete for Method 1, Microsilica concrete for Method 2, and Class DP concrete for Method 3, as described in 584 -1.03 Placement Methods.
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NEW YORK STATE DEPARTMENT OF TRANSPORTATION Sections 200 - 599 STANDARD SPECIFICATIONS (USC) January 1, 202 4 Volume 2 E. Positive -tie-downs. Anchors drilled into the structural slab and connected to reinforcing steel.
584-1.03 Placement Methods.
A.Method 1 - Separate Placement. Place Class D or Class DP slab reconstruction concrete and Microsilica overlay concrete separately. Use only one type of slab reconstruction concrete on each placement.
B.Method 2 - Integral Placement of Microsilica Concrete (Optional). When all of the following conditions are satisfied, Microsilica overlay concrete and Microsilica slab reconstruction concrete may be placed in a single lift:
1.The area of the exposed top mat of bar reinforcement is 5% or less of the placement area, per span.
2.No individual area of the exposed top mat of bar reinforcement exceeds 25 sf .
3.No dimension of any area of the exposed top mat of bar reinforcement exceeds 6 feet .
C.Method 3 - Integral Placement of Class DP Concrete (Optional). When 100% of the top mat of bar reinforcement is exposed, Class DP overlay concrete and Class DP slab reconstruction concrete may be placed in a single lift.
584-2 Materials
584-2.01 General. All materials listed in §557-2 with the following:
A.Air Entraining Admixture. §711-08 with the following: For Microsilica concrete, use only a vinsol resin -based air entraining agent.
B.Microsilica Admixture
1.Follow the requirements of §501 -2 and §501 -3.01.
2.Samples will be taken in accordance with Materials Method 9.1M and Materials Procedure 90.1.
3.Blended Portland Cement, §701 -03 (Type SF) may also be used for the Portland cement/microsilica portion of the Class DP and the Microsilica Concrete designed mix.
C.(Vacant )
584-2.02 Manufacture of Class DP Concrete
A.Proportioning. The initial ingredient proportions, except for admixtures, are given in TABLE 584-1.
B.Handling, Measuring and Batching. Follow the requirements of §501 -3.02 and §501 -3.03, except that water reduction must be accomplished using only a water -reducing and retarding admixture (§711 -08, ASTM Type D). If a microsilica slurry is used, include the slurry water as mix water.
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NEW YORK STATE DEPARTMENT OF TRANSPORTATION Sections 200 - 599 STANDARD SPECIFICATIONS (USC) January 1, 202 4 Volume 2 TABLE 584 -1 MIX CRITERIA - CLASS DP CONCRETE Cement Content ( lb/cy ) 536 Fly Ash Content ( lb/cy ) 145 Microsilica Content ( lb/cy ) 44 Sand Percent Total Aggregate (solid volume) 45.8 Designed Water/Total Cementitious Content 0.4 Desired Air Content (%) Allowable Air Content (%) 7.5 6.0 - 9.0 Desired Slump ( inches ) Allowable Slump ( inches ) 4 2 - 5 Type of Coarse Aggregate Gradation CA 1 NOTE: The criteria are given for design information and the data is based on a fine aggregate modulus of 2.80 and a CA1 coarse aggregate gradation. Adjust the mixture proportions using actual fineness modulus and bulk specific gravities (saturated surface dry for aggregates). Compute the adjustments according to Department instructions.
584-2.03 Manufacture of Microsilica Concrete
A.Proportioning. The initial ingredient proportions except for admixtures are in TABLE 584 -2. TABLE 584 -2 MIX CRITERIA - MICROSILICA CONCRETE Cement Content ( lb/cy ) 657 Microsilica Content ( lb/cy ) 61 Sand Percent Total Aggregate (solid volume) 53 Designed Water/Total Cementitious Content 0.37 Desired Air Content (%) Allowable Air Content (%) 6.5 5.0 - 8.0 Desired Slump ( inches ) Allowable Slump ( inches ) 4 2 - 6 Type of Coarse Aggregate Gradation CA 1 NOTE: The criteria are given for design information and the data is based on a fine aggregate modulus of 2.80 and a CA1 coarse aggregate gradation. Adjust the mixture proportions using actual fineness modulus and bulk specific gravities (saturated surface dry for aggregates). Compute the adjustments according to Department instructions.
B.Handling, Measuring and Batching. Follow the requirements of Subsection 501 -3.02 and -3.03, except that water reduction must be accomplished using only a High -Range Water -Reducing Admixture (§711 -08, ASTM Type F). Add the High -Range Water Reducer at the batching facility. The Regional Materials Engineer may allow a maximum of two additions of water and/or admixture at the work site. Provide an additional 30 mixing revolutions for each addition of water and/or admixture. However, once the concrete has reached the desired s lump, only the High -Range Water Reducer may be used to adjust the concrete slump. The maximum total mixing revolutions is 200. Observe the Manufacturer’s maximum dosage rate for the admixture, regardless of where the admixture is added. If a microsilic a slurry is used, include the slurry water as mix water.
584-2.04 Equipment
A.Microsilica Admixture. Follow Subsection 584 -2.01B.
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NEW YORK STATE DEPARTMENT OF TRANSPORTATION Sections 200 - 599 STANDARD SPECIFICATIONS (USC) January 1, 202 4 Volume 2 B. Finishing Machine. A finishing machine capable of self propulsion in forward and reverse, raising the screeds above the screeded surface when traveling in reverse, and meeting one of the two sets of requirements below.
1.Roller Screed. Must be equipped with a power driven strike -off auger, power driven finishing roller, vibrating pan or roller producing 3000 to 7000 vpm, and pan float.
2.Dual Oscillating Screed. Must be equipped with at least 2 oscillating screeds producing between 3000 and 7000 vpm, strike -off auger, and control of each screed's vertical position and tilt angle. The specific method and equipment used for finishing will be approved by the Regional Construction Engineer before use. Provide access to the machine at the work site for one working day, for inspection by the Engineer. Have a qualified Finishing Machine Operator present at the time of inspection. Two weeks prior to the inspection date, provide the Engineer with a copy of the operating manual for their exclusive use. Use supporting rails with no bends or kinks. Support the rails with fully adjustable supports (no shims), spaced a maximum of 12 inches on center. When placing concrete adjacent to a completed placement, set the supporting rails for one side of the finishing machine on the completed placement.
C.Recording Thermometer. A continuous recording thermometer capable of measuring temperatures in the range of 30 F to 100 F for a minimum of 24 hours. Include the cost of calibration in the unit price bid.
D.(Vacant)
584-3 Construction Details
584-3.01 Limitation of Operations
A.No structural concrete removal work is permitted in areas adjoining new concrete during the new concrete's specified curing period.
B.No loads, other than construction loads which are less than 2 tons and approved by the Engineer, are permitted on areas of the structural slab where concrete has been removed.
C.No loads are permitted on concrete until completion of the specified curing period.
584-3.02 Blast Cleaning
A.Blast clean all surfaces to be in contact with new concrete. Remove all grease and dirt. Remove all rust and mortar which is not firmly bonded to the surface being cleaned. Rust and concrete deposits which are firmly bonded and cannot be removed by bl ast cleaning may remain. A light coating of orange rust, that forms on steel surfaces after blast cleaning, is not considered detrimental to bond and may remain. Remove all debris created by blast cleaning.
B.Place reinforcing steel supports and positive -tie-downs at a maximum spacing of 4 feet .
C.Repeat blast cleaning if more than 48 hours pass before concrete placement begins.
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NEW YORK STATE DEPARTMENT OF TRANSPORTATION Sections 200 - 599 STANDARD SPECIFICATIONS (USC) January 1, 202 4 Volume 2 584-3.03 Preplacement Wetting. After blast cleaning has been accepted, thoroughly wet the structural slab surface and all porous surfaces to be in contact with new concrete for at least 12 hours immediately prior to placement. Remove all standing water with oil -free compressed air, a nd protect the deck from drying, so the concrete remains in a saturated surface dry condition.
584-3.04 (Vacant)
584-3.05 Handling and Placing Concrete. §557-3.05 and §557-3.12 with the following:
A.Place concrete only when the ambient air temperature and deck surface temperature (after wetting) will be below 85 F during the entire placement.
B.Place overlay concrete only if preplacement wetting has been completed on an area large enough to require one working day for placement, at least one span length.
C.When using concrete transporting devices on a prepared surface, protect exposed reinforcing steel from deformation and prevent contamination of the surface.
D.If operations are delayed for more than 30 minutes, install a construction dam or bulkhead. If placement operations are delayed for more than 60 minutes or if the concrete attains initial set, discontinue placement for at least 48 hours. This restrict ion does not prohibit continuation of the placement provided a gap is left in the placement. This gap is to be sufficient in length to allow the finishing machine to clear the previously placed concrete. Prepare the gap area for concrete placement in a ccordance with this specification, after the previously placed concrete, on both sides of the gap, has cured for 48 hours.
584-3.06 Finishing and Curing
A.Slab Reconstruction Concrete - Separate Placement. §557-3.09 and §557-3.11 with the following:
1.For areas less than 25 sf, hand finishing of slab reconstruction concrete is acceptable. For areas greater than 25 sf , use either a manually driven vibrator equipped power screed from the Department’s Approved List or the same machine to be used to finish the overlay.
2.Screed to the level of the surrounding concrete. When 100% of the reinforcing steel is exposed, screed to a minimum 3/8 inch above the reinforcing steel. Roughen the screeded surface with a tining rake or similar device.
3.Cure concrete with wet burlap for 3 days. Provide uniform continuous wetting until concrete curing is complete. The wet burlap and curing cover option is not allowed.
4.Blastclean the surface, according to §584-3.02, after the curing period is over, but prior to wetting. Expose approximately 50% of the surface coarse aggregate, and leave an irregular texture.
B.Overlay Concrete. §557-3.08, §557-3.11, and §557-3.12 with the following:
1.Finish overlay concrete to a minimum depth of 1 1/2 inches and a minimum total cover over top mat of bar reinforcement of 2 3/8 inches . Use a finishing machine meeting the requirements of this specification.
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NEW YORK STATE DEPARTMENT OF TRANSPORTATION Sections 200 - 599 STANDARD SPECIFICATIONS (USC) January 1, 202 4 Volume 2 2. Machine finish the concrete within 10 minutes of its deposition onto the deck. If the machine cannot finish the concrete within the 10 minute time limit, stop all further placement, immediately cover the fresh concrete with plastic curing covers, and ke ep the unfinished concrete covered until it is machine finished. Once concrete being placed can be machine finished within the 10 minute time limit, resume placing concrete.
3.Apply curing within 10 minutes after machine finishing. Provide uniform continuous wetting until concrete curing is complete. Cure Microsilica concrete with wet burlap for 4 days. Cure Class DP concrete with wet burlap for 7 days. The wet burlap and c uring cover option is not allowed.
584-3.07 Construction Joints. For the purpose of this specification, construction joints provide for
interruptions in overlay concrete placement. At transverse and longitudinal construction joints, place the overlay concrete a distance at least equal to the depth of the overlay, beyond the intended joint location. After the overlay concrete has cured for 48 hours, sawcut along the joint to a depth of 3/4 1/8 inch . Chip the extra overlay concrete to the level of the original prepared surface at a 45 angle. Do not undercut existing concrete.
584-3.08 Defective or Damaged Concrete. §557-3.16 with the following:
A.Defects and damage, for the purposes of this specification, are imperfections caused by the Contractor's operations, including, but not limited to: cracking, tearing, and open areas. Repair all defective or damaged concrete at no cost to the Department , using the same class of concrete originally placed.
B.Make all repairs rectangular in plan shape and as close to square as possible. Sawcut the perimeter of the repair to a depth of 3/4 1/8 inch . Chip out the damaged or defective concrete to the level of the original prepared surface. Angle the walls of the repair cavity at 45 toward the center of the repair. Do not undercut existing concrete. Prepare the surfaces of the repair cavity and place new concrete in accordance with this specification.
584-4 METHOD OF MEASUREMENT. For placements with 100% exposure of the top mat of bar
reinforcement, the number of square yards of slab reconstruction concrete will be equal to the number of square yards of overlay concrete. For placements with less than 100% exposure of the top mat of bar reinforcement, measure slab reconstruction concrete prior to overlay concrete placement.
A.Method 1 - Separate Placement. Measure slab reconstruction concrete as the number of square yards of Class D or Class DP slab reconstruction concrete placed. Measure overlay concrete as the number of square yards of plan area of Microsilica overlay concrete placed.
B.Method 2 - Integral Placement of Microsilica Concrete (Optional). Measure slab reconstruction concrete as the number of square yards of Microsilica slab reconstruction concrete placed. Measure overlay concrete as the number of square yards of plan area of Microsilica overlay concrete placed.
C.Method 3 - Integral Placement of Class DP Concrete (Optional). Measure slab reconstruction concrete as the number of square yards of Class DP slab reconstruction concrete placed. Measure overlay concrete as the number of square yards of plan area of Class DP overlay concrete placed.
584-5 BASIS OF PAYMENT. Include the cost of all labor, materials and equipment necessary to
complete the work in the unit bid price.
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NEW YORK STATE DEPARTMENT OF TRANSPORTATION Sections 200 - 599 STANDARD SPECIFICATIONS (USC) January 1, 202 4 Volume 2 Payment will be made under: Item No. Item Pay Unit 584.3001nn Overlay Concrete, Microsilica Concrete – Type 1 Friction Square Yard 584.3002nn Overlay Concrete, Microsilica Concrete – Type 2 Friction Square Yard 584.3003nn Overlay Concrete, Microsilica Concrete – Type 3 Friction Square Yard 584.3009nn Overlay Concrete, Microsilica Concrete – Type 9 Friction Square Yard 584.3101nn Overlay Concrete, Class DP – Type 1 Friction Square Yard 584.3102nn Overlay Concrete, Class DP – Type 2 Friction Square Yard 584.3103nn Overlay Concrete, Class DP – Type 3 Friction Square Yard 584.3109nn Overlay Concrete, Class DP – Type 9 Friction Square Yard 584.3200nn Slab Reconstruction Concrete, Class D, DP or Microsilica Concrete Square Yard NOTE : nn denotes a serialized pay item. SECTION 585 - STRUCTURAL LIFTING OPERATIONS (Last Revised May, 2019)
585-1 DESCRIPTION. This work shall consist of raising, supporting, and lowering each designated
bearing point to perform the tasks specified in the contract documents. This work shall also include the temporary shoring of a bearing point where a shim tight installation is designated on the plans. Examples of work specifying a shim tight installation include, but are not limited to: • Temporary shoring of capbeams during staged construction. • Temporary shoring of girders during substructure rehabilitation. • Temporary shoring of a bridge construction stage to decrease or eliminate live load deflection.
585-1.01 Bearing Point. The term bearing point is defined as a point on the structure which is designated
on the plans to be raised or shored to perform other work.
585-1.02 Lift Point. The term lift point is defined as a point on the structure where the lifting force is
applied.
585-1.03 Type. The type designation is used to distinguish between different methods of accomplishing
thework, and/or significantly different lifting loads. Such situations will be noted on the contract plans. They will be defined by a type designation. The type designation will be reflected in the pay item title (e.g., 5 85.01 Structural Lifting Operations - Type A, etc.).
585-2 Materials
585-2.01 Used Materials. Used materials will be allowed. Those materials that are permanently attached
to the structure shall be new, and meet the requirement of the New York State Steel Construction Manual and the following requirements: Structural Steel 715-01 High Strength Bolts, Nuts and Washers 715-14 Pins and Rollers 715-15
585-2.02 Lifting Equipment. Unless otherwise specified in the contract documents or plans, the choice
of structural lifting system and/or temporary shoring shall be at the Contractor's option, subject to the following provisions:
Source: New York Standard Specifications, 2024 Edition. Pages 444–449 of 1,264.