RSA_Bridge-FSSS.docx

FOREST SERVICE

SUPPLEMENTAL SPECIFICATIONS

FOR

RIO SAN ANTONIO BRIDGE

ROAD NO. 87 – M.P. 8.3

U.S.D.A Forest Service, Region 3 Carson National Forest Tres Piedras Ranger District Rio Arriba County, New Mexico

RIO SAN ANTONIO BRIDGE

Road No. 229 – M.P. 8.3

FOREST SERVICE SUPPLEMENTAL SPECIFICATIONS

TABLE OF CONTENTS

ii

PREFACE

Delete all but the first paragraph and add the following:

The Forest Service, US Department of Agriculture has adopted FP-03 for construction of National Forest System Roads.

101 - TERMS, FORMAT, AND DEFINITIONS

101.01 Meaning of Terms.

Add the following:

Delete all references to the TAR (Transportation Acquisition Regulations) in the specifications.

101.03 Abbreviations.

Add the following to (a) Acronyms:

AFPA

MSHA

NIST

NESC

WCLIB

American Forest and Paper Association Mine Safety and Health Administration National Institute of Standards and Technology National Electrical Safety Code West Coast Lumber Inspection Bureau

Add the following to (b) SI Symbols:

101.04 Definitions.

Delete the following definitions and substitute the following:

Bid Schedule--The Schedule of Items.

Bridge--No definition.

Contractor--The individual or legal entity contracting with the Government for performance of prescribed work. In a timber sale contract, the contractor is the “purchaser”.

Culvert--No definition.

Right-of-Way--A general term denoting (1) the privilege to pass over land in some particular line (including easement, lease, permit, or license to occupy, use, or traverse public or private lands), or (2) Real property necessary for the project, including roadway, buffer areas, access, and drainage areas.

Add the following:

Adjustment in Contract Price--“Equitable adjustment,” as used in the Federal Acquisition Regulations, or “construction cost adjustment,” as used in the Timber Sale Contract, as applicable.

Change--“Change” means “change order” as used in the Federal Acquisition Regulations, or “design change” as used in the Timber Sale Contract.

Design Quantity--“Design quantity” is a Forest Service method of measurement from the FS-96 Forest Service Specifications for the Construction of Roads and Bridges. Under these FP specifications this term is replaced by the term “Contract Quantities”.

Forest Service--The United States of America, acting through the Forest Service, U.S. Department of Agriculture.

Neat Line--A line defining the proposed or specified limits of an excavation or structure.

Pioneer Road--Temporary construction access built along the route of the project.

Purchaser--The individual, partnership, joint venture, or corporation contracting with the Government under the terms of a Timber Sale Contract and acting independently or through agents, employees, or subcontractors.

Protected Streamcourse--A drainage shown on the plans or timber sale area map that requires designated mitigation measures.

Road Order--An order affecting and controlling traffic on roads under Forest Service jurisdiction. Road Orders are issued by a designated Forest Officer under the authorities of 36 CFR, part 260.

Schedule of Items--A schedule in the contract that contains a listing and description of construction items, quantities, units of measure, methods of measurement, unit price, and amount.

Utilization Standards--The minimum size and percent soundness of trees described in the specifications to determine merchantable timber.

Add Figure 101-1—Illustration of road structure terms:

Figure 101-1—Illustration of road structure terms.

102 - BID, AWARD, AND EXECUTION OF CONTRACT

102 Bid, Award, and Execution of Contract Delete Section 102 in its entirety.

104 - CONTROL OF WORK

104 Control of Work.

Delete sections 104.01, 104.02, and 104.04.

Add the following subsection:

104.06 Use of Roads by Contractor

The Contractor is authorized to use roads under the jurisdiction of the Forest Service for all activities necessary to complete this contract, subject to the limitations and authorizations designated in the Road Order(s) or described in the contract, when such use will not damage the roads or national forest resources, and when traffic can be accommodated safely.

105 - CONTROL OF MATERIAL

105.02 Material Sources.

Add the following before the first paragraph.

Sources have been designated for this project as follows:

Aggregate Surfacing Source – Contractor Furnished

Riprap Source – Contractor Furnished

Foundation Fill Source – Contractor Furnished

Imported Roadway Embankment – Contractor Furnished – The Contractor may use suitable onsite material from structure excavation and/or roadway excavation for roadway embankment construction. All material must be approved by the CO before placement. Additional roadway embankment shall be Contractor furnished.

Imported Structural Backfill – Contractor Furnished – The Contractor may use suitable onsite material from structure excavation and/or roadway excavation for structural backfill. All material must be approved by the CO before placement. Additional structural backfill shall be Contractor furnished.

Streambed Simulation Material Source – Contractor Furnished

Waste Site – Government Furnished - A waste site for unsuitable material is available within five miles from the project site. The site will be located by the CO.

Materials Stockpile Site – Government Furnished – The Contractor will be allowed to stockpile material, including riprap, crushed aggregate, and bridge components at the project site only at the designated stockpile areas shown on the Drawings. The locations will be staked by the CO. The Contractor may propose alternate stockpile areas and shall obtain approval from the CO. Provide the CO 72 hours advance notification prior to stockpiling any materials at the construction sites.

106 - ACCEPTANCE OF WORK

106.07 Delete

Delete subsection 106.07.

107 - LEGAL RELATIONS AND RESPONSIBILITY TO THE PUBLIC

107.05 Responsibility for Damage Claims.

Delete the entire subsection.

107.06 Contractor’s Responsibility for Work.

Delete the following from the first paragraph.

“except as provided in Subsection 106.07”

107.09 Legal Relationship of the Parties.

Delete the entire subsection:

107.10 Environmental Protection.

Add the following:

Design and locate equipment repair shops, stationary refueling sites, or other facilities to minimize the potential and impacts of hazardous material spills on Government land.

Before beginning any work, submit a Hazardous Spill Plan. List actions to be taken in the event of a spill. Incorporate preventive measures to be taken, such as the location of mobile refueling facilities, storage and handling of hazardous materials, and similar information. Immediately notify the CO of all hazardous material spills. Provide a written narrative report form no later than 24 hours after the initial report and include the following:

· Description of the item spilled (including identity, quantity, manifest number, and other identifying information).

· Whether amount spilled is EPA or state reportable, and if so whether it was reported, and to whom.

· Exact time and location of spill including a description of the area involved.

· Containment procedures.

· Summary of any communications the Contractor had with news media, Federal, state and local regulatory agencies and officials, or Forest Service officials.

· Description of clean-up procedures employed or to be employed at the site including final disposition and disposal location of spill residue.

When available provide copies of all spill related clean up and closure documentation and correspondence from regulatory agencies.

The Contractor is solely responsible for all spills or leaks that occur during the performance of this contract. Clean up spills or leaks to the satisfaction of the CO and in a manner that complies with Federal, state, and local laws and regulations.

108 - PROSECUTION AND PROGRESS

108 Delete Delete Section 108 in its entirety.

109 - MEASUREMENT AND PAYMENT

109 Deletions Delete the following entire subsections:

109.06 Pricing of Adjustments.

109.07 Eliminated Work.

109.08 Progress Payments.

109.09 Final Payment.

109.02 Measurement Terms and Definitions.

(b) Contract quantity.

Add the following:

Contract quantities will be adjusted only when there are errors in the original design of 15% or more.

Change the following:

“(b) Cubic yard” to “(c) Cubic yard”.

Add the following definition:

(p) Thousand Board Feet (Mbf). 1,000 board feet based on nominal widths, thickness, and extreme usable length of each piece of lumber or timber actually incorporated in the job. For glued laminated timber, 1,000 board feet based on actual width, thickness, and length of each piece actually incorporated in the job.

(q) Actual Quantities (AQ). These quantities are determined from measurements of completed work.

151 - MOBILIZATION

151.01 Description

Add the following requirements:

Noxious Weed Control Requirements:

All construction equipment to be used at the job site shall be cleaned and certified free of noxious weeds and their seeds prior to entrance on to forest lands, whether they are owned, leased or borrowed by the Contractor or any subcontractors. “Construction equipment” does not include personal vehicles or support equipment that remains on the main travel route.

Cleaning shall occur off forest land.

Construction equipment shall be visually inspected by the COR and each one certified in writing to be reasonably clean and weed free. Inspections will take place at a forest administrative site with the Contractor providing at least 24 hours notice. The location of the administrative site is to be agreed upon in advance between the COR and the Contractor or Subcontractor. Equipment is expected to proceed directly to the job site following the inspection and to not leave the designated weed management district wherein the job site exists.

Certification shall remain valid for each identified piece of equipment for the duration of the specified project and only as long as the equipment remains at the job site or within the designated weed management district. Equipment leaving the designated weed management district will need to be recertified as weed free before being allowed to return to the job site.

151.03 Payment

Add the following:

Include all costs associated with the cleaning of equipment in the unit price for Mobilization.

152 – CONSTRUCTION SURVEY AND STAKING

152.03 Survey and Staking Requirements.

Add the following:

Conduct all construction staking under the direction of a licensed professional engineer or land surveyor who is closely associated and familiar with construction staking.

153 – CONTRACTOR QUALITY CONTROL

Add the following.

153.07. Project Submittals

At a minimum the contractor shall provide project submittals as shown on the below Submittal Log. Submittal requirements are listed in the Standard Specifications, Supplemental Specifications, and Plans.

Submittal Log

Pay Item(s)

/Drawings Additional Specification References

Certification FSSS 105.02(b)

Certification

Certification

Approval

Certification

Approval

FSSS 622.02

Certification

155 – SCHEDULES FOR CONSTRUCTION CONTRACTS

155 Delete Delete Section 155 in its entirety.

156 - PUBLIC TRAFFIC

156.03 Accommodating Traffic During Work.

Delete the following from the last paragraph:

According to Subsection 106.07(b)

Delete the first paragraph and replace with the following:

Accommodate traffic according to the requirements set forth below, MUTCD, and Section 635. Submit a traffic control plan for acceptance at least 30 days before intended use.

Add the following project specific requirements:

The Contractor will be allowed to close Road No. 87 to through traffic for up to four (4) continuous weeks.

It is the responsibility of the Contractor to schedule delivery of materials, equipment, and all necessary supplies to the site, to ensure that the culvert can be substantially completed within the specified contract time. The Contractor shall give the CO at least two weeks advanced written notice prior to any road closure. The Contractor shall be responsible for providing, installing, maintaining, and removal of warning signs and Type 3 barricades required for the road closure period. At the Contractors written request, traffic delays up to one hour will be approved should the project work neccessitate short traffic delays outside the closure period.

Contractor shall provide and install seven (7) road closure signs for the duration of the project. The signs shall read “Rio San Antonio Crossing on Forest Road 87 is Closed for Construction from August ___ to September ____”. The signs are to be placed as indicated below:

1. Intersection of NFSR 87 with Highway 285

2. Intersection of NFSR 83 with Highway 285

3. Intersection of NFSR 576 with Highway 285

4. Intersection of NFSR 118 with Highway 285

5. Intersection of NFSR 133 with Highway 64

6. Intersection of NFSR 42 with Highway 64

7. Intersection of NFSR 284 with Highway 87A

RIO SAN ANTONIO CROSSING ON FOREST ROAD 87 IS

CLOSED FOR CONSTRUCTION FROM SEPT

. ___ TO

OCT

156.08 Traffic and Safety Supervisor.

Delete this subsection in its entirety.

156.10 Measurement and payment.

Delete this subsection in its entirety and replace with the following:

Do not measure Public Traffic for payment. Compensation for this item shall be incidental to Mobilization.

157 – SOIL EROSION CONTROL

157.02 Materials.

Add the following:

Provide bales, wattles, logs and rolls from a certified noxious weed free source.

157.03 General.

Add the following:

Delete the first two paragraphs and replace with the following:

Submit an Erosion Control Plan detailing permanent and temporary control measures to minimize erosion and sedimentation during and after construction in accordance with the plans and storm water permits. Do not modify the type, size, or location of any control or practice without approval. Submit the erosion control plan proposal at least 7 days before operations begin to the CO for approval.

Reflect in the Erosion Control Plan special concerns and measures necessary to protect resources and government improvements. Include:

(a) The construction activities and sequence of implementation relating to specific erosion control measures.

(b) The location and type of permanent controls to be implemented during construction.

(c) The location and type of temporary controls to be implemented during construction.

(d) For work in stream channels with running water a detailed dewatering plan.

(e) For work in stream channels without flowing water describe level of ground and vegetative disturbance and measures to reduce potential sediment delivery.

(f) Description of the monitoring plan.

Permitting Requirements: The Contractor will be responsible for obtaining the following permits:

1. Section 404 permit from the U.S. Army Corps of Engineers, Albuquerque Regulatory Division,

2. Section 401 permit from the New Mexico Environmental Department – Surface Water Quality Bureau,

3. Section 402 permit (NPDES), which will require the development of a Storm Water Pollution Prevention Plan (SWPPP) and submission of a Notice of Intent (NOI) with the EPA.

Refer to the Drawings for other permitting requirements.

Add the following to the third paragraph:

Upon completion of construction at the site, remove all temporary erosion control devices, dewatering materials and equipment from Government property.

157.08 Water Crossings.

Add the following:

The Contractor may cross the channel with equipment a maximum of 10 times. The location of the crossing has been shown on the Drawings. The Contractor shall obtain approval from the CO prior to crossing the channel.

203 – REMOVAL OF STRUCTURES AND OBSTRUCTIONS

203.01 Delete and replace with the following:

This work consists of disposing of clearing slash, salvaging, removing and disposing of buildings, fences, structures, pavements, culverts, utilities, curbs, sidewalks, and other obstructions.

203.05 Disposing of Material.

Modify this subsection as follows:

(a) Remove from project. Add the following:

All materials designated for removal become property of the Contractor and are to be disposed of by removing off of National Forest Lands in accordance with all local, state, and federal requirements.

(b) Burn. Delete this section.

(c) Bury. Delete this section.

Add the following:

(e) Placing Slash on Embankment Slopes. Place construction slash on completed embankment slopes and on reconstructed channel banks or scatter as directed by the CO to reduce soil erosion. Place construction slash as flat as practicable on the completed slope. Priority for use of available slash is for: (1) through fills; (2) insides of curves; and (3) ditch relief outlets. All slash material not suitable for embankment slopes shall be disposed off Forest Service Lands in accordance with all local, state and federal requirements or as approved by the CO.

204 - EXCAVATION AND EMBANKMENT

204.11 Compaction.

Delete and replace with the following:

Layer Placement (Roller Compaction) Method. Place material by end dumping to the minimum depth needed for operation of spreading equipment. Adjust the moisture content of the material to obtain a mass that will not visibly deflect under the load of the hauling and spreading equipment. Operate compaction equipment over the full width of each layer until visible deformation of the layer ceases or, when a sheepsfoot roller is used, the roller “walks out” of the layer. Make at least six complete passes.

204.14 Disposal of Unsuitable or Excess Material.

Delete the text of the first paragraph and substitute the following:

Dispose of unsuitable or excess material at designated sites or as directed by the CO.

208 - STRUCTURE EXCAVATION AND BACKFILL FOR SELECTED MAJOR STRUCTURES

208.04 General.

Add the following:

This work will also consist of the removal of the existing culverts and stacked rock and mortar headwall.

208.04 General.

Add the following:

Use all suitable material in the construction of the roadway embankment and for structural backfill. Field drain and dry excessively wet material that is otherwise suitable for embankment before placement. Place and shape unsuitable or excess material in the designated sites or as directed by the CO.

208.08 Dewatering.

Delete the subsection and add the following:

Submit a dewatering plan according to Section 157.03.

Construct diversion prior to performing any excavation and according to Sections 157.08 and 157.09. Construct diversions using water tight, non-eroding methods. Employ settling basins or other methods so that muddy water is not returned to stream. Install, operate, and remove diversions in a manner that minimizes erosion and sedimentation.

208.10 Backfill.

Add the following:

The backfill height over the top of the footings on the precast abutments shall not exceed five feet prior to placing and securing the superstructure.

208.14 Payment.

Add the following:

Payment for the removal and disposal of the existing culverts and headwall will be made under Item 20806.

251 - RIPRAP

251.01 Description.

Delete the first sentence and add the following:

This work consists of furnishing, hauling, and placing riprap for bank protection, slope protection, drainage structures, erosion control, and other features shown on the plans.

251.07 Acceptance.

Delete the fourth sentence and add the following:

Structure excavation and backfill will be evaluated under section 208.

251.09 Payment.

Add the following:

The cost of excavation, embankment, and haul required for placement of riprap is incidental to the riprap pay item.

301 – UNTREATED AGGREGATE COURSES

301.05 Compacting.

Delete and replace with the following:

Layer Placement (Roller Compaction) Method. Place material by end dumping to the minimum depth needed for operation of spreading equipment. Adjust the moisture content of the material to obtain a mass that will not visibly deflect under the load of the hauling and spreading equipment. Operate compaction equipment over the full width of each layer until visible deformation of the layer ceases or, when a sheepsfoot roller is used, the roller “walks out” of the layer. Make at least six complete passes.

553 – PRESTRESSED CONCRETE

553.05 Method Approval.

Add the following:

Precast/Prestressed concrete members must be manufactured by a plant with the following certifications:

· Precast / Prestressed Concrete Institute (PCI)

· Bridge 4, Prestressed Deflected-Strand Bridge Beams (superstructure).

· National Precast Concrete Association (NPCA)

· Precast and Prestressed

Submit a copy of the transmittal letter of the latest PCI or NPCA inspection/certification with the shop drawings.

622 - RENTAL EQUIPMENT

622.02 Rental Equipment.

Delete the first two sentences of the first paragraph and add the following:

Hydraulic Excavator. Provide a track mounted hydraulic excavator. Excavator shall be no more than 15 years old and shall be reasonably free of leaks and other mechanical deficiencies. Bucket must be equipped with a hydraulic "thumb". Contractor shall supply an excavator of a size capable of performing the excavation needs for the project, i.e. structure excavation, riprap construction, willow transplanting, etc., or other work that may be directed under this section.

Submit the model number of the equipment to the CO for approval before delivery to the project site. Contractor is required to get approval of the size of the Hydraulic Excavator from the Contracting Officer prior to any work taking place.

625 - TURF ESTABLISHMENT

625.04 Preparing Seedbed.

Delete entire subsection.

625.05 Watering

Delete entire subsection and replace with the following:

Moisten seeding areas before seeding.

625.06 Fertilizing.

Delete entire subsection – There will be no application of fertilizer.

625.07 Seeding.

(a) Dry method. Delete the third sentence.

Add the following after subsection (b).

Seed Mix. Seed mix shall be pre-mixed. Furnish and apply the following kinds and amounts pure live seed:

Seed Certification Certified, blue-tagged seed shall be used where a name variety or cultivar is specified. Blue tags that are removed to mix or spread the seed will be saved and provided to the Forest.

All seed purchased will be certified free of seeds from weeds listed on the current "All States Noxious Weeds List."

Pounds of seed to be furnished per acre shall be obtained by dividing the pounds of pure live seed required per acre by the product of the percent purity and percent germination.

Example: (5 lbs. pure live seed/acre) = 6.55 lbs.

(0.90 x 0.85) commercial seed/acre where: purity = 90%; germination = 85%.

625.08 Mulching.

Delete the entire subsection and replace with the following:

Mulching:

Mulch material shall be weed free straw and shall be applied at a uniform rate to adequately cover the seed. The weed free straw shall be from a grain crop such as barley straw, wheat straw or oat straw.

Mulch will be applied in a one-step operation with the seed at the rate of 1 Ton per Acre.

648 – STREAM SIMULATION

Description

648.01 This work consists of placing rock and fill to stabilize the channel banks and simulate a natural streambed, profile, and cross section though road stream crossings.

Material

648.02 Use streambed simulation material at the Class stated on the drawings to reconstruct the channel.

Bank stabilization material shall meet the requirements stated on the Drawings. Conform to the following subsection:

Construction Requirements

648.03 General. Place streambed simulation material on a prepared surface to form a well-graded, low permeability mass, similar in appearance and texture to the natural streambed. Do not drive metal track or rubber tired equipment directly on metal or concrete structure surfaces.

648.04 Conserved Topsoil and Vegetated Soil Mats. Conserve riparian vegetation, vegetated soil mats, and topsoil from excavation and embankment areas. Stockpile conserved riparian vegetation, vegetated soil mats, and topsoil in low windrows immediately beyond the rounding limits of cut and embankment slopes or in other approved locations. Separate from other excavated material. Water soils mats as necessary to ensure transplant success.

Place conserved topsoil on completed slopes according to Section 624.

648.05 Channel Excavation and Embankment.

Do not disturb material and vegetation outside the construction limits.

Excavate as necessary to construct the channel geometry shown on the Drawings and as directed by the CO. Scarify earth cuts to 6 inches below subgrade within the channel construction limits. Compact the scarified material according to Subsection 648.06.

Utilize streambed simulation material at the Class stated on the drawings for channel embankment.

Dispose of unsuitable or excess excavation material at the waste site designated in Section 105.

Compact the material according to Subsection 648.07.

648.06 Placed Streambed Simulation Material and Channel Rock.

(a) Method A, Machine Placed. Place streambed simulation material in one or more layers with a layer depth less than eight inches. Place stream simulation by methods that do not cause segregation or damage to the prepared surface. Place or rearrange individual rocks by mechanical methods to obtain a compact low permeability mass matching the natural stream configuration.

(b) Conform to subsection 251.04 for placement of bank stabilization material.

648.07 Compaction.

Compact the material using mechanical and/or hand labor methods to form a well-graded, low permeability mass, similar in appearance and texture to the natural streambed.

648.08 Acceptance. Channel embankment and stabilized bank will be evaluated under Subsections 106.02 and 106.04.

Measurement

648.09 Measure the items listed in the bid schedule according to Subsection 109.02.

Payment

648.10 The accepted quantities, measured as provided in Subsection 109.02, will be paid at the contract unit price per unit of measurement for Section 648 pay items listed in the bid schedule. Payment will be full compensation for the work prescribed in this Section. See Subsection 109.05.

705 - ROCK

Add the following:

705.07 Streambed Simulation Rock.

(a) General. Furnish a mixture of soil, gravel, cobble, and boulders to simulate a natural streambed. The cobbles and boulders should be hard, durable rock that conforms to test values in 705.02.

Table 705-5 – Gradation requirements for Streambed Simulation Material, inches or sieve size

725 - MISCELLANEOUS MATERIAL

Add the following section:

725.40 High-Strength Nonshrink Grout.

Furnish grout that is packaged and ready for use with the addition of water at the construction site. Ensure that each bag is stamped to show the last date on which it may be used. Use grout that consists of a hydraulic cementitious system, graded and processed natural fine aggregate, and additional technical components such that the product meets the following conditions:

(a) Free of inorganic accelerators, including chlorides.

(b) Free of oxidizing catalysts.

(c) Free of gas-producing agents.

(d) When mixed to 130 percent flow on flow table (ASTM C 230 at 10 drops), it does not reduce in linear dimension when tested in accordance with ASTM C157. Take measurements at 72 hours and 7 days.

(e) Produces no bleeding for the first 2 hours after mixing when mixed to 130 percent flow on flow table (ASTM C 230 at 10 drops), as tested in accordance with ASTM C232.

(f) Has a minimum strength as follows when tested in accordance with ASTM C 109:

(1) After 72 hours, 25 MPa (3500 psi).

(2) At 7 days, 40 MPa (6000 psi).

(3) After 28 days, 50 MPa (7200 psi).

Provide performance characteristics at 115 to 120 percent flow on flow table (ASTM C 230 at 10 drops).

(g) It must be designed, as stated by the manufacturer, to be mixed, placed, and cured at atmospheric temperatures of 5O C to 30O C (40O F to 85O F). Submit products proposed for use for approval by the CO and accompany them with manufacturer’s submittals substantiating all requirements in this subsection, including graphs or charts showing the time, temperature, and humidity requirements for curing to achieve the specified grout strengths; and recommendations for storage, mixing, application, and curing procedures.

As specified as grout on the contract plans, the following products meet the above requirements.

1. MASTERFLOW 928 GROUT, manufactured by Chemrex.

2. CRYSTEX GROUT, manufactured by L&M Construction Chemicals, Inc.

3. CEMENT ALL, manufactured by CTS Cement Manufacturing Co.

4. SURE-GRIP HIGH PERFORMANCE GROUT manufactured by Dayton Superior.

725.41 Mortar.

Furnish mortar that is packaged and ready for use with the addition of water at the construction site. Ensure that each bag is stamped to show the latest date on which it may be used. Use mortar that consists of a cementitious system made up of:

(a) Natural aggregate, 3/8” maximum size, that meets the requirements specified in ASTM C 33 except for grading. Accomplish grading by blending sieve sizes to obtain the optimum density.

(b) Metallic aggregate free from nonferrous material, soluble alkaline compounds, and visible rust.

(c) Water reducers, workability agents, air-entraining agents, and catalysts.

Blend the materials to minimize bleeding, increase workability, resist exposure to freeze-thaw cycles and deicing salts, and prevent shrinkage within and at the perimeter of the patch, keyway, or other area to be filled.

Ensure that the minimum compressive strength of the mortar, as tested by ASTM C 109 for a 3” slump, is:

· 24-hour..........................................................................................35MPa (5000 psi)

· 7-day.............................................................................................60 MPa (8500 psi)

· 28-day........................................................................................70 MPa (10,000 psi)

Ensure that the durability of the products when tested at 300 cycles, ASTM C 666, procedure A is:

Submerged in: DF (%)

Water 98

5% CaCl2 solution 95

5% NaCL solution 85

Ensure that the scaling resistance has a rating of 3, Moderate Scaling, after 50 cycles when tested in accordance with ASTM C 672.

Provide certification from the manufacturer that the product is compatible for work that is 1” or more in depth and more than 1” in width; and where the mixing, placing, and curing temperatures may range from 5O C to 30O C (40O F to 85O F).

Submit products proposed for use to the CO for approval, and accompany them with the manufacturer’s submittals substantiating all requirements in this section, including (1) graphs or charts showing the time, temperature, humidity, and curing requirements to achieve mortar strengths equal to the adjacent concrete; and (2) complete recommendations for storage, mixing, application, and curing procedures.

As specified as mortar on the contract plans, the following products meet the above requirements.

1. EMACO T425 or T430, manufactured by Chemrex.

2. RAPID SET DOT REPAIR MIX manufactured by CTS Cement Manufacturing Co.

5. SURE-GRIP HIGH PERFORMANCE GROUT (when extended with pea gravel) manufactured by Dayton Superior.

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