Technical Exhibit C - Additional Specifications AD001976P (20-06-01).pdf

Headquarters III Corps, Fort Hood Directorate of Public Works (DPW)

Technical Exhibit “C”

REVIEW CC AND HOW/OIS

INTERSECTION

ADDITIONAL

SPECIFICATIONS

June 1, 2020

Contract No. W91151‐20‐B‐0002

Note: These Specifications are presented to supplement Technical Exhibit A. Technical Exhibit C supersedes any like specifications found in Technical Exhibit A of this contract.

Directorate of Public Works Engineering Division US Army, III Corps 4612 Engineer Dr.

Fort Hood, TX 76544

SECTION 1

TOPSOIL W/ SODDING

1. DESCRIPTION

This section includes but not limited to; providing soil, preparation of the soil, soil conditioners as required, fertilizing, grading and sodding.

Topsoil w/ Sodding shall be supplied and installed in all areas as required per drawings.

References:

UNIFIED FACILITIES GUIDE SPECIFICATIONS

UFGS-01 33 29 (2014) Sustainability Requirements

2. MATERIALS

Sod: Sod shall be Bermuda for designated urban areas and Buffalograss for designated rural areas.

3. EQUIPMENT

(NOT SPECIFIED)

4. CONSTRUCTION OR WORK METHODS

Topsoil: To the extent possible, existing on-site topsoil shall be re-used for finish application. Clear and grub existing vegetation three to four weeks prior to stockpiling topsoil. Treat growing vegetation with application of an approved herbicide, only when indicated. Scrape/clear surface of the topsoil piles every 2 weeks to prevent weed establishment.

Prior to placement of topsoil, test topsoil for pH, nitrogen, phosphorous and potassium. Soil tests shall be conducted at a rate of 2 per acre, with a minimum of 2 tests regardless of area. Spread topsoil across site a minimum of 4 inches thick. Till topsoil, remove rocks exceeding ½ inch nominal diameter. Correct irregularities in finish surfaces to eliminate depressions. Protect finished topsoil areas from damage by vehicular or pedestrian traffic.

For designated urban areas only (rural areas do not require fertilizer), apply fertilizer type and rate as required by soil test to achieve optimum nutrient content for primary grass type (Buffalograss for rural areas and Bermuda for rural areas);

fertilizer may be liquid, granule, organic, or inorganic. Water topsoil for one week (2 inches) prior to application of sod (rural and urban areas).

Sod: Cultivate the area to a depth of 4 inches before placing the sod.

Plant the sod specified and mulch, if required, after the area has been completed to lines and grades as shown on the plans.

Unless otherwise indicated in plans, sod shall be installed around perimeter of all new hardscape (i.e. pavement, utility pads, drain inlets) and new facilities, extending 10 feet in all directions.

Sod shall be installed over prepared topsoil. Sod shall be laid without gaps, offset in a brick pattern, rolled, and watered regularly.

Rolling: Immediately after sodding, firm entire area with a roller not exceeding 90 pounds per foot of roller width except for slopes in excess of 3 to 1 with a roller.

Finishing: After completing sodding, blend edges of sodded area smoothly into surrounding area. Air pockets shall be eliminated a true and even surface shall be provided. Frayed edges shall be trimmed and holes and missing corners shall be patched with sod.

Vegetative Coverage: Prior to application of sod, contractor shall notify COR 24 hrs in advance for a preparatory meeting.

Mulching: Hay or straw mulch shall be spread uniformly, when indicated.

Mulch shall be spread by hand, blower-type mulch spreader, or other approved method. Mulching shall be applied in a uniform manner until the area is covered. The mulch shall not be bunched or clumped. Sunlight shall not be completely excluded from penetrating to the ground surface.

All areas installed with sod shall be mulched on the same day as sodding.

Mulch shall be anchored immediately following spreading, when indicated.

Conditions: Perform erosion control operations under favorable weather conditions. Controls shall be installed in accordance with the approved SWPPP and shall be installed prior to the start of site work. Erosion control measures may be adjusted to meet field conditions as required by state and federal regulations.

Water Access in Fire Hydrants: To use a fire hydrant for irrigation, the Contractor shall obtain prior clearance from the Contracting Officer and provide tools and connections approved for use on fire hydrants. If a fire hydrant is used, Contractor shall provide a reduced pressure backflow preventer for each connection between hose and fire hydrant.

Backflow preventer used shall be tested once per month by a certified backflow preventer tester.

Protecting Existing Vegetation: When there are established lawns in the work area, the turf shall be covered and/or protected or replaced after construction operations. Identify existing trees, shrubs, plant beds, and landscape features that are to be preserved on site by appropriate tags and barricade with reusable, high-visibility fencing along the drip line. Mitigate damage to existing trees at no additional cost to the Government. Damage shall be assessed by a state certified arborist or other approved professional using the National Arborist Association's tree valuation guideline.

Mowing: Mowing is required in urban areas only. Mowing shall be performed on temporary and permanent vegetation under the control of the contractor, and existing vegetation within 20' of construction.

Vegetation in urban areas shall not exceed 4 inches in height at any time.

Obstructions Below Ground: When obstructions below ground affect the work, submit shop drawings showing proposed adjustments to placement of erosion control material for approval.

Installation: Immediately stabilize exposed soil using mulch, compost and seed. Stabilize areas for construction access immediately as specified in the paragraph Construction Entrance. Install principal sediment basins and traps before any major site grading takes place.

Provide additional sediment traps and sediment fences as grading progresses. Provide inlet and outlet protection at the ends of new drainage systems. Remove temporary erosion control measures at the end of construction and provide permanent seeding.

Construction Entrance: Provide as indicated on drawings, a minimum of 6 inches thick, at points of vehicular ingress and egress on the construction site. Construction entrances shall be cleared and grubbed, and then excavated a minimum of 3 inches prior to placement of the filter fabric and aggregate. The aggregate shall be placed in a manner that will prevent damage and movement of the fabric. Place fabric in one piece, where possible. Overlap fabric joints a minimum of 12 inches.

Maintenance and Clean-up: Dispose of excess material, debris, and waste materials offsite (organic material shall be diverted from landfill).

All excess material shall be cleared from hardstands (ie: pavement, drain inlets, utility pads). Replace unacceptable material at no additional cost to the government. After the vegetation requirements of the submitted SWPPP have been met, or 70% re-vegetative coverage established (if no SWPPP was required), and at the COR's approval, the contractor shall remove all temporary controls. The SWPPP shall not be considered completed until these actions are performed and accepted by the DPW Environmental Division and the COR.

Delivery: Deliver fertilizer to the site in original containers bearing manufacturer's chemical analysis, name, trade name, or trademark, and indication of conformance to state and federal laws. Instead of containers, fertilizer may be furnished in bulk with a certificate indicating the above information.

Storage:

Sod: Sod shall be stored in designated areas and kept in a moist condition by watering with a fine mist, and covering with a moist burlap, straw, or other approved covering. Protect sod from exposure to wind and direct sunlight until planted. Provide covering that will allow air to circulate so that internal will not develop. Do not store sod longer than 24 hours. Do not store directly on concrete or bituminous surfaces.

Fertilizer and Mulch Storage: Material shall be stored in designated areas. Fertilizer shall be stored in cool, dry locations away from contaminants.

Handling: Do not drop or dump materials from vehicles.

Submittals: The following shall be submitted in accordance with Section

CC SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

SWPPP Requirements Watering Plan

SD-06 Test Reports

Soil Test Reports Weekly water usage report

SWPPP Requirements: Storm Water Pollution Prevention Plan (SWPPP) shall be prepared and submitted to the government COR in accordance with the Construction General Permit, TXR150000.

Once approved by the DPW Environmental Division and accepted by the government COR, the contractor shall submit required documentation to TCEQ and provide validation of permit coverage to the government COR.

Note: Reference the plans for SWPPP requirement. A SWPPP may not be required for every project.

Watering Plan: All areas shall be watered daily, for a minimum of 6 weeks.

Further watering may be necessary to be deemed established (see SWPPP requirements).Contractor shall be responsible for establishing watering procedures and frequency in order to establish stabilized vegetation to meet the requirements of the submitted SWPPP or 70% re-vegetation coverage (if no SWPPP was required). Watering methods shall not impair vehicular or pedestrian traffic, shall be maintained, and shall remain in good condition until removal. Uncontrolled release of water from site is not permitted.

Contractor shall be responsible for providing, using, and monitoring backflow preventer and water meter on water source for watering purposes.

A weekly water usage report shall be submitted to the COR with water consumption used during watering.

Watering is not permitted between the hours of 10:00 pm and 2:00 pm (do not water in the morning). Watering shall not exceed 54,308 gallons per acre per week (2 inches per week). In after 3 weeks of watering no substantial germination has occurred, COR shall be notified, and contractor will be required to evaluate the areas of no growth and provide the Government with additional options to reach compliance.

Quality Assurance: The installer shall be certified by the manufacturer for training and experience installing the material.

Scheduling: Submit a construction work sequence schedule, with the approved erosion control plan a minimum of 30 days prior to start of construction. The work schedule shall coordinate the timing of land disturbing activities with the provision of erosion control measures to reduce on-site erosion and off-site sedimentation. Coordinate installation of temporary erosion control features with the construction of permanent erosion control features to assure effective and continuous control of erosion, pollution, and sediment deposition. Include a vegetative plan with planting and seeding dates and fertilizer, lime, and mulching rates. Distribute copies of the work schedule and erosion control plan to site subcontractors. Address the following in the erosion control plan:

a. Statement of erosion control and stormwater control objective.

b. Description of temporary and permanent erosion control, stormwater control, and air pollution control measures to be implemented on site.

c. Description of the type and frequency of maintenance activities required for the chosen erosion control methods.

d. Comparison of proposed post-development stormwater runoff conditions with predevelopment conditions.

--- END OF SECTION ---

SECTION 2

EMULSIFIED ASPHALT SLURRY SEAL SURFACE TREATMENT (TYPE

II)

This section contains requirements for an emulsified asphalt slurry seal surface treatment consisting of a mixture of emulsified asphalt, mineral aggregate, and water properly proportioned and mixed on an asphalt prepared underlying course in accordance with the details shown on the plans and the requirements of this section.

References: Texas Department of Transportation Standard Specifications for Construction and Maintenance of Highways, Streets, and Bridges (TSDHSB), 2014 - in its entirety.

Item 300 Asphalts, Oils and Emulsions

American Society for Testing and Materials (ASTM)

Publications:

ASTM D 242 (2009; R 2014) Fabricated Deformed Steel Bar Mats for Concrete Reinforcement

Emulsified Asphalt: Provide either SS-1H, CSS-1H, or CSS-1P emulsified asphalt in accordance with Section 300.2.D of (TSDHSB), “Emulsified Asphalt” unless otherwise noted in the plans.

Mineral Aggregate: Provide aggregate consisting of manufactured sand, slag, crusher fines, crushed stone, or a combination thereof.

The aggregate shall be clean and free from foreign matter, dirt, and other deleterious substances. The aggregate shall have a sand equivalent of not less than 45 percent when tested in accordance with Tex-203-F. The aggregate shall show a loss of not more than 35 percent when tested in accordance with Tex-410-A. The aggregate, when tested in accordance with Tex-411-A, shall not lose more than 20 percent when using magnesium sulfate and not lose more than 12 percent when using sodium sulfate.

The aggregate shall be 100 percent crushed. The aggregate gradations and tolerances shall be dictated by the job mix formula.

Mineral Filler: If mineral filler, in addition to that naturally present in the aggregate, is necessary, it shall meet the requirements of ASTM D242 and shall be used in the amounts required by the mix design. The mineral filler shall be considered as part of the aggregate.

Water: Water used in making the slurry shall be potable and free from harmful soluble salts and chemicals.

Job-Mix Formula (JMF): The Contractor shall submit to the Contracting Officer Representative (COR) for approval a complete mix design on the materials proposed for use, prepared and certified by an approved plant. The plant shall have experience in designing slurry seal mixes and a signed copy of the mix design shall be submitted in writing by the Contractor to the COR at least 10 days after award. No slurry seal for payment shall be placed until a mix design has been approved by the COR. Compatibility of the aggregate, emulsion, mineral filler, and other additives shall be verified by the mix design. The mix design shall be made with the same aggregate and grade of emulsified asphalt that the Contractor will provide on the project. At a minimum the required tests and values needed are as follows:

Description Specification

ISSA TB-100 Wet track abrasion of slurry surfaces 50 g/ft² Max

ISSA TB-115 Determination of slurry system compatibility Pass

The laboratory report (mix design) shall indicate the proportions of aggregates, mineral filler (min. and max.), water (min. and max.) and asphalt emulsion based on the dry aggregate weight. It shall also report the quantitative effects of moisture content on the unit weight of the aggregate (bulking effects). The mix design shall be in effect until modified in writing by the COR. Should a change in sources of materials be made, a new mix design shall be established before the new material is used.

The design of the emulsified asphalt slurry seal should be a creamy-textured slurry that, when spread, will flow ahead of the strike-off squeegee and will flow down into the cracks in the pavement and fill them. Technical Bulletin No. 111, “Outline Guide Design Procedure for Slurry Seal”, and publication A-105, “Recommended Performance Guidelines for Emulsified Asphalt Slurry Seal” published by the International Slurry Surfacing Association (ISSA) contains information to aid designers of slurry mixes.

The combined mineral aggregate shall conform to the Type II gradation shown in Table 1 when tested in accordance with TEX-401-A.

The job mix formula (mix design) shall be developed using aggregate within the gradation band for the desired type shown in Table 1. Once the mix design has been submitted and approved, the aggregate used on the project shall not vary by more than the allowed tolerances shown in Table 2. At no time shall the aggregate used go out of the gradation bands in Table 1. A Type II gradation band shall be required unless otherwise noted in the plans.

The aggregate will be accepted at the job location or stockpile. The stockpile will be accepted based on five gradation tests samples in accordance with Tex-401-A. If the average of the five tests is within the gradation tolerances, then the materials will be accepted.

Precautions shall be taken to prevent segregation of the aggregate in storing and handling. The stockpile shall be kept in areas that drain readily.

Table 1. Gradation of Aggregates

Sieve Size Percent by Weight Passing

Type II

3/8 in. (9.5 mm) 100

No. 4 (4.75 mm) 90 - 100

No. 8 (2.36 mm) 65 - 90

No. 16 (1.18 mm) 45 - 70

No. 30 (600 micro m) 30 - 50

No. 50 (300 micro m) 18 - 30

No. 100 (150 micro m) 10 - 21

No. 200 (75 micro m) 5 - 15

Residual asphalt content, % dry weight of aggregate

7.5% - 13.5%

Gradation Tolerance: Once the mix design has been accepted, the aggregate gradation used on the project may vary from the aggregate gradation in the mix design on each sieve by the percentages shown in Table 2. If the project aggregate fails to remain within this tolerance, operations will cease and a new mix design will be required at the expense of the Contractor.

Table 2. Gradation Tolerance

Sieve Size Tolerance, percent by weight passing sieve

3/8 in. (9.5 mm) + or – 0%

No. 4 (4.75 mm) + or - 5%

No. 8 (2.36 mm) + or - 5%

No. 16 (1.18 mm) + or - 3%

No. 30 (600 micro m) + or - 3%

No. 50 (300 micro m) + or - 3%

No. 100 (150 micro m) + or - 3%

No. 200 (75 micro m) + or - 2%

Residual Asphalt, % dry weight of aggregate + or - 1%

1. EQUIPMENT

Maintain equipment in good repair and operating condition.

Mixing Machine and Spreader: Furnish a self-propelled emulsified asphalt slurry seal mixing and spreading machine with:

Self-loading devices to promote continuous laying operations;

Sufficient storage capacity for mixture of materials and to maintain an adequate supply to the proportioning equipment;

Individual volume or weight controls that will proportion each material to be added to the mix;

Continuous flow mixing with a revolving multi-blade mixer capable of discharging the mixture on a continuous flow basis;

Opposite side driving stations with full controls;

Full hydrostatic control of the forward and reverse speed during operation;

A water pressure system and nozzle-type spray bar immediately ahead of the spreader box and capable of spraying the roadway for the width of the spreader box;

A mechanical-type spreader box equipped with paddles or other devices capable of agitating and spreading the materials throughout the box;

Equipped with a fines feeder that provides an accurate metering device or method to introduce a predetermined proportion of mineral filler into the mixer at the same time and location that the aggregate is fed into the mixer;

Capable of pre-wetting the aggregate before mixing;

Sufficient storage capacity to properly mix and apply a minimum of 5 tons of the slurry;

A spreader box with devices capable of providing lateral movement or side shift abilities; and

A spreader box with a front seal, adjustable rear strike-off, and an adjustable secondary rear strike-off.

Calibrate and properly mark each control device that proportions the individual materials. Equip the aggregate feed with a revolution counter or similar device capable of determining the quantity of aggregate used at all times.

Provide a positive- displacement-type emulsion pump with a revolution counter or similar device capable of determining the quantity of emulsion used at all times. Provide an approved mineral filler feeding system capable of uniformly and accurately metering the required material.

Calibration documents must be readily available upon COR request. No machine will be allowed to work on the project until the calibration has been completed and/or accepted.

Auxiliary Equipment: Other tools or equipment such as brushes, hand squeegees, hose equipment, tank trucks, water distributors and flushers, power blowers, barricades, etc., shall be provided as required.

Roller: The roller, if required, shall be a self-propelled pneumatic-tired roller capable of exerting a contact pressure during rolling of 50 lb. / sq. in. It shall be equipped with a water spray system, to be used if the slurry is picking up on the tires during rolling.

Tack Coat and Distributor: A tack coat is required prior to the slurry seal. The tack coat shall be applied at least 2 hours before the slurry seal but within the same day.

Refer to Section 301, Bituminous Prime and/or Tack Coat for application.

Broom: Provide a rotary power broom for used as directed by the COR.

Asphalt Storage and Handling Equipment: When storage tanks are used, furnish a thermometer in each tank to indicate the asphalt temperature continuously. Keep equipment clean and free of leaks. Keep asphalt materials free from contamination.

2. CONSTRUCTION OR WORK METHODS

General: Produce, transport, and place slurry seal as specified in this section or on the plans. Ensure that the finished surface has a uniform texture and the slurry seal mat is fully adhered to the underlying pavement.

Temporary Material Storage:

Aggregate Storage: Stockpile materials in a manner that will prevent segregation or contamination. Remix stockpiles with suitable equipment when necessary to eliminate segregation.

Use a scalping screen while transferring aggregates to the mixing machine to remove oversize material.

Mineral Filler Storage: Store the mineral filler in a manner that will keep it dry and free from contamination.

Asphalt Material Storage: Keep asphalt materials free from contamination.

Weather Limitations: Place the material when the atmospheric temperature is at least 50°F and rising and the surface temperature is at least 50°F.

Cease placement when the atmospheric temperature is below 60°F and falling, when weather is cloudy, foggy, or rainy, or when rain is imminent as determined by the Engineer. Cease placement 24 hr. before forecasted temperatures below 32°F.

Surface Preparation: Thoroughly clean the surface of all vegetation, loose aggregate, dust, dirt, or other loose foreign matter, grease, oil, excessive rubber accumulation, or any type of objectionable surface film.

Any standard cleaning method will be acceptable except that water flushing will not be permitted in areas where considerable cracks are present in the pavement surface. Remove existing raised pavement markers if necessary.

Material Transfer and Mixing: Minimize construction joints by providing continuous loading of material while placing slurry seal. Ensure that oversized material has been removed prior to transferring the aggregates to the mixing machine. Wet the aggregate prior to mixing with the emulsion. The mixing unit of the mixing chamber shall thoroughly blend all ingredients. No excessive mixing shall be permitted.

Test Sections: Test sections shall be placed prior to the start of the slurry seal the QC shall submit test reports to the COR. The test area will be designated by the COR and will be located on the existing pavement. Test strips shall be made by each machine after calibration.

Samples of the slurry seal may be taken and the mix consistency verified by using ISSA TB-106 Slurry Seal Consistency test. In addition, the proportions of the individual materials may be verified by the COR by using the calibration information provided after machine calibration. If any test does not meet specification requirements, additional tests shall be made at the expense of the Contractor, until an acceptable test strip is placed.

Application Rate: 18-22 lb/SY The rate of application shall not vary more than +/- 2 pounds per square yard.

Placing: The surface shall be pre-wet by fogging ahead of the slurry spreader box at an application rate of 0.05 to 0.10 gallons per square yard. Water used in pre-wetting the surface shall be applied at such a rate that the entire surface is damp with no apparent flowing water in front of the slurry spreader box. The slurry mixture shall be of the desired consistency when deposited on the surface, and no additional elements shall be added. Total time of mixing shall not exceed 2 minutes. A sufficient amount of slurry shall be carried in all parts of the spreader box at all times so that complete coverage of all surface voids and cracks is obtained. Care shall be taken not to overload the spreader box. The mixture shall be placed at a slow and uniform rate not to exceed 5 miles per hour. No lumping, balling, or unmixed aggregate shall be permitted. No segregation of the emulsion and fines from the coarse aggregate will be permitted. If the coarse aggregate settles to the bottom of the mix, the slurry shall be removed from the pavement surface. A sufficient amount of slurry shall be fed into the box to keep a full supply against the full width of the spreader box. The mixture shall not be permitted to overflow the sides of the spreader box. No breaking of the emulsion will be allowed in the spreader box.

Spread the mixture uniformly to the lines and grades shown on the plans or as directed. Shift the spreader box when necessary to maintain proper alignment. Clean the spreader box as necessary to minimize clumps. Set and maintain the spreader box skids to prevent chatter in the finished mat. Prevent loss of material from the spreader box by maintaining contact between the front seal and the road surface. Adjust the rear seal to provide the desired spread. Adjust the secondary strike-off to provide the desired surface texture. A burlap drag or other approved screed may be attached to the rear of the spreader box to provide a uniform mat.

The finished surface shall have no more than four (4) tear or drag marks greater than 1/2 in. wide and 4 in. long in any 12 ft. by 22 ft.

section. It shall have no tear or drag marks greater than 1 in. wide and 3 in. long. The finished surface shall have no transverse ripples of 1/4 in. or more in depth, as measured with a 10 ft. straight edge laid upon the surface.

Adjacent lanes shall be lapped at the edges a minimum of 2 in. with a maximum of 4 in. to provide complete sealing at the overlap.

Longitudinal and transverse joints shall be neat and uniform without buildup, uncovered areas, or unsightly appearance. All joints shall have no more than 1/4 in difference in elevation when measured across with a 10 ft. straight edge.

If rolling is required by the COR, the surface shall be subjected to a minimum of two full coverage passes by the roller. These rolling passes are to be done as soon as the slurry mixture will support the roller without damage.

In areas where the spreader box cannot be used, the slurry shall be applied by means of a hand squeegee. Upon completion of the work, the slurry seal coat shall have no holes, bare spots, or cracks through which liquids or foreign matter could penetrate to the underlying pavement. The finished surface shall present a uniform and skid resistant texture satisfactory to the COR. All wasted and unused material and all debris shall be removed from the site prior to final acceptance.

Upon completion of the project, the Contractor shall sweep the finished surface with a conventional power rotary broom, to remove any potential loose material from the surface. The material removed by sweeping shall be disposed of in a manner satisfactory to the COR. Curing: Protect the finished mat from traffic until the mix cures and will not be damaged by traffic. Allow to cure for 4 to 24 hours, depending on the weather conditions as directed by the COR. Protect other locations subject to sharp turning or stopping. Any damage to uncured slurry seal shall be repaired by the contractor.

Submittals: See specification section CC Submittal Procedures and below.

Job Mix Formula

ISSA TB-100 – Wet track abrasion of slurry surfaces

ISSA TB-115 – Determination of slurry system compatibility

SECTION 3

CRACK SEALING (HOT APPLIED) IN BITUMINOUS PAVEMENT

This section covers the repair of random traverse, longitudinal (including edge) and shrinkage cracks in bituminous pavements. This section will be applied when needed to seal cracks up to 1-inch wide.

References: The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by their basic designation only.

Texas Department of Transportation Standard Specifications for Construction and Maintenance of Highways, Streets and Bridges (TSDHSB), 2014 - in its entirety.

Item 712 Cleaning and Sealing Joints and Cracks

(Asphalt Concrete)

AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM)

ATSM D 242 (2009; R 2014) Mineral Filler for Bituminous Paving Mixtures

ASTM D 1073 (1994) Fine Aggregate for Bituminous Paving

Mixtures

ASTM D 6690 (2012) Joint and Crack Sealants, Hot Applied, for Concrete and Asphalt Pavements

FEDERAL SPECIFICATION

SS-S-1401C (2009) Sealants, Joint, Non-Jet-Fuel-Resistant, Hot-Applied, For Portland and Asphalt Concrete Pavements

Special elastic rubber-asphalt compound designed for crack sealing and filling in the central Texas climate. Crack sealant shall meet referenced specifications including AASHTO M 173, ASTM D 1190, ASTM D 3405, or Federal Specification SS-S-1401.

All plant, equipment, tools, and machines used in the performance of this work shall be approved by the Contract Officer prior to the commencement of work.

Power Router: Self-powered equipment capable of routing out random cracks as well as joints in asphalt concrete and portland cement pavements.

Power Brush/Blower: Self-powered equipment capable of cleaning debris out of random cracks and joints in asphalt concrete and portland cement pavements. Equipment shall wire brush, blow out, and dress-up side walls in cracks.

Sealer Applicator: Truck or trailer mounted pressure applicator capable of dispensing hot applied sealant material.

Accessories:

Mineral Filler: Mineral filler shall conform to ASTM D 242.

Sand: Sand shall conform to ASTM D 1073. The gradations as specified in ASTM D 1073 may be adjusted to meet local materials. Adjustments will be approved by the contracting Officer.

Squeegee: Hand squeegee designed for crack repair in bituminous pavements.

Preparation:

Routing: Use equipment designed to rout cracks in bituminous pavements. Rout cracks prior to sealing.

Cleaning: Clean cracks of incompressible materials and debris with equipment designed for crack repair. Blow the materials away with compressed air.

Application: Crack sealant shall be hot-applied using an approved sealer applicator. The pavement cracks shall be filled with crack sealer. Do not overfill. When applying material by squeegee, sealant material shall not exceed 1-1/2 inch in width and shall be flush with the roadway. If the sealant shrinks upon cooling, additional sealant shall be added to fill the opening flush with the pavement surface.

Protection: Protect freshly placed crack sealant from damage by vehicular traffic. Dust sealant with fine sands or mineral dust. The Contractor shall be responsible for traffic control during this sealant cure period. There shall be no additional charge to the government because of shrinkage.

Submittals: The following shall be submitted in accordance with SECTION CC

SUBMITTAL PROCEDURES:

SD-43, Construction Equipment List

All plant, equipment, machines, and tools used in the work shall be subject to approval and shall be maintained in a satisfactory working condition at all times.

Certificate of compliance from manufacturer of the crack sealant

Material receipt tickets to verify gallons of material used must be submitted weekly as the work progresses.

Storage: Crack sealants and other materials shall be stored in such a manner as to avoid contamination.

Site Conditions: Crack sealing work shall not close roadways. At least one lane of traffic shall remain open while sealing work takes place. Begin crack filling operations at the roadway centerline and work back to the pavement edge.

SECTION 4

PAINTING/ STRIPING MARKING REMOVAL

Eliminate existing pavement markings and raised pavement markers.

The following actions are used to perform the Removal Painting/

Striping Marking Removal

Raised Marker Removal

Sandblast Existing Striping

Pressure Wash Existing Striping

Thermoplastic Removal

References: The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by the basic designation only.

TEXAS STATE DEPARTMENT OF HIGHWAYS AND PUBLIC TRANSPORTATION 2014

STANDARD SPECIFICATION FOR CONSTRUCTION OF HIGHWAY, STREETS AND BRIDGES

(TSDHPT)

Item 666 Reflectorized Pavement Markings

Item 668 Prefabricated Pavement Markings

Item 672 Raised Pavement Markers

Item 677 Eliminating Existing Pavement Markings And Markers

Item 678 Pavement Surface Preparation for Markings

Pavement striping and marking with paint materials and thermoplastic type materials. All striping and re-striping will adhere to TxDOT Pavement Marking Handbook revised Aug 2004.

Survey existing conditions before placements of paving markings.

If existing condition is found to be not in alignment with the centerline of the travel way, then notify the COR immediately. Any markings placed without prior notice of the COR and found to be out of alignment shall be replaced to government approval at no cost to the government.

Unless noted on the plans or with given approval by the COR; existing striping that is to be restriped shall be completely removed per TxDOT Pavement Marking Handbook and TxDOT Specification section 677.

All striping shall be cleaned and touched up per government approval prior to acceptance.

This section above is for clarification, Pavement Striping and Markings is located in Section 7.

Furnish surface treatment materials in accordance with Item 300, “Asphalts, Oils, and Emulsions”; Item 302, “Aggregates for Surface Treatments”; and Item 316, “Surface Treatments.” Use approved patching materials for repairing damaged surfaces.

Use a commercial abrasive blasting medium capable of producing the specified surface cleanliness. Use potable water when water is required.

Furnish and maintain equipment in good working condition. Use moisture and oil traps in air compression equipment to remove all contaminants from the blasting air and prevent the deposition of moisture, oil, or other contaminants on the roadway surface.

Eliminate existing pavement markings and markers on both concrete and asphaltic surfaces in such a manner that color and texture contrast of the pavement surface will be held to a minimum. Repair damage to asphaltic surfaces, such as spalling, shelling, etc., greater than 1/4 in. in depth resulting from the removal of pavement markings and markers. Dispose of markers in accordance with federal, state, and local regulations. Use any of the following methods unless otherwise shown on the plans.

Surface Treatment Method: Apply surface treatment material at rates shown on the plans or as directed. Place a surface treatment a minimum of 2 ft. wide to cover the existing marking. Place a surface treatment, thin overlay, or microsurfacing a minimum of 1 lane in width in areas where directional changes of traffic are involved or in other areas as directed by the Engineer.

Burn Method: Use an approved burning method. For thermoplastic pavement markings or prefabricated pavement markings, and symbols, heat may be applied to remove the bulk of the marking material prior to blast cleaning. When using heat, avoid spalling pavement surfaces. Sweeping or light blast cleaning may be used to remove minor residue.

Blasting Method: Use a blasting method such as water blasting, abrasive blasting, water abrasive blasting, shot blasting, slurry blasting, water-injected abrasive blasting, or brush blasting as approved. Remove pavement markings and symbols on concrete surfaces by a blasting method only.

Mechanical Method: Use any mechanical method except grinding.

Flail milling is acceptable in the removal of markings and symbols on asphalt and concrete surfaces.

SECTION 5

BITUMINOUS PRIME AND/OR TACK COAT

1. DESCRIPTION

This section is used when performing the Bituminous Prime and/or Tack Coat.

Bituminous Prime Coat Bituminous Tack Coat

This section shall govern for the application of asphaltic material on the completed base course and/or other approved areas in accordance with these specifications.

For estimation purposes 0.40 gallons per square yard for the Bituminous Prime and 0.15 gallons per square yard for the Tack Coat of pavement surface will be used.

References: Texas Department of Transportation Standard Specifications for Construction and Maintenance of Highways, Streets, and Bridges (TSDHSB), 2014 - in its entirety.

2. MATERIALS

The asphaltic material used for the prime coat shall be a cutback asphalt of the type and grade specified and shall meet the requirements of Item 300, "Asphalts, Oils and Emulsions"(TSDHSB).

3. EQUIPMENT

(NOT SPECIFIED)

4. CONSTRUCTION OR WORK METHODS

Prime coat shall not be applied when the air temperature is below 60 F and falling, but it may be applied when the air temperature is above 50 F and is rising, the air temperature being taken in the shade and away from artificial heat. Asphaltic material shall not be placed when general weather conditions, in the opinion of the Contracting Officer, are not suitable.

When, in the opinion of the Contracting Officer, the area and/or base is satisfactory to receive the prime coat, the surface shall be prepared by sweeping or other approved methods. If found necessary by the Contracting Officer, the surface shall be lightly sprinkled with water just prior to the application of the asphaltic material.The asphaltic material shall be applied on the prepared surface by an approved self-propelled pressure distributor so operated as to distribute the material at the rate directed by the Contracting Officer, evenly and smoothly, under a pressure necessary for proper distribution.

The Contractor shall provide all necessary facilities and equipment for determining the temperature of the asphaltic material in all of the heating equipment and in the distributor, for determining the rate at which it is applied, and for securing uniformity at the junction of two (2) distributor loads.

The distributor tank, when used for pay purposes, shall have been calibrated within three (3) years from the date it is first used on this project. The tank calibration procedure shall be in accordance with Test Method Tex-922-K, Part I, and shall be signed and sealed by a registered professional Contracting Officer. Unless otherwise shown on the plans, the Contractor shall provide the tank calibration and shall furnish the Contracting Officer an accurate and satisfactory calibration record prior to beginning the work. The Contracting Officer may at any time verify calibration accuracy in accordance with Test Method Tex-922-K, Part II, and may perform the required recalibration if the calibration is found to be in error.

No traffic, hauling or placing of any subsequent courses shall be permitted over the freshly applied prime coat until authorized by the Contracting Officer.

The Contractor shall be responsible for the maintenance of the surface until the placement of subsequent courses or the work is accepted by the Contracting Officer.

All equipment used in storing or handling asphaltic material shall be kept clean and in good operating condition at all times and shall be operated in such a manner that there will be no contamination of the asphaltic material. When the asphaltic material is stored in a storage tank unit equipped with a heater, the Contractor shall provide and maintain a recording thermometer to continuously indicate the asphaltic material temperature.

Application Rate and Temperature:

Tack Coat:

Application Rate - Bituminous material for the tack coat shall be applied in quantities of not less than 0.05 gallon or more than 0.15 gallon per square yard of pavement surface. The exact quantities within the range specified, which may be varied to suit field conditions, will be determined by the Contracting Office. A small test strip may be used to determine the appropriate application rate.

Application Temperature:

Liquid Asphalt RC-250 165-250 degrees F.

Emulsions SS-1 70-160 degrees F.

Prime Coat:

Application Rate - Bituminous material for the prime coat shall be applied in quantities of not less than 0.20 gallons nor more than 0.40 gallons per square yard of pavement surface. The exact quantities within the range specified, which may be varied to suit field conditions, will be determined by the Contracting Officer. A small test strip may be used to determine the appropriate application rate.

Application Temperature, normal spray application temperatures for cutback asphalt.

MC-30 85-190 degrees F.

MC-70 120-225 degrees F.

Submittals: Submittals, Sampling & Testing Guide, see specification section CC Submittal Procedures and the following.

Certified copies of the manufacturer’s test reports indicating compliance with applicable specified requirements shall be submitted to the Contracting Officer not less than 15 days before the material is required in the work.

Waybills and delivery tickets shall be submitted during progress of the work.

SECTION 6

PAVEMENT MARKING SURFACE PREPARATION

This section governs how to prepare asphalt and concrete pavement surface areas before placement of pavement markings and raised pavement markers. Item 677, “Eliminating Existing Pavement Markings or Markers,” governs complete removal of existing markings.

References: The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by the basic designation only.

Markings and Markers

Item 678 Pavement Surface Preparation for Markings type materials. All striping and re-striping will adhere to TxDot Pavement Marking Handbook revised Aug 2004.

Survey existing conditions before placements of paving markings. If existing condition is found to be not in alignment with the centerline of the travel way, then notify the COR immediately. Any markings placed without prior notice of the COR and found to be out of alignment shall be replaced to government approval at no cost to the government.

Unless noted on the plans or with given approval by the COR;

existing striping that is to be restriped shall be completely removed per TxDOT Pavement Marking Handbook and TxDOT Specification section 677.

prior to acceptance.This section above is for clarification, Pavement Striping and Markings is located in Section 605.

Use a commercial abrasive-blasting medium capable of producing the specified surface cleanliness. Use potable water, when water is required.

Furnish and maintain equipment in good working condition. Use moisture and oil traps in air compression equipment to remove all contaminants from the blasting air and prevent the deposition of moisture, oil, or other contaminants on the roadway surface.

Prepare pavement surface of sufficient area for the pavement markings or raised pavement markers shown on the plans. Remove all contamination and loose material. Avoid damaging the pavement surface. When existing pavement markings are present, remove loose and flaking material.

Approved pavement surface preparation methods are sweeping, air blasting, flail milling, and blast cleaning unless otherwise specified on the plans.

For concrete pavement surfaces, in addition to the above, air blast after the removal of contamination or existing material and just prior to placing the stripe. Perform the air blasting with a compressor that is capable of generating compressed air at a minimum of 150 cfm and 100 psi using 5/16-in. or larger hosing for the air blast.

Contaminants up to 0.5 sq. in. may remain if they are not removed by the following test, performed just before application of markings:

Step 1. Air-blast the surface to be tested, to simulate blasting during application of markings.

Step 2. Firmly press a 10-in.-long, 2-in.-wide strip of monofilament tape onto the surface, leaving approximately 2 in.

free.

Step 3. Grasp the free end and remove the tape with a sharp pull.

SECTION 7

PAVEMENT STRIPING & MARKINGS

This section is to supply and install pavement striping, markings and beads.

References: The publications listed below form a part of this

TEXAS STATE DEPARTMENT OF HIGHWAYS AND PUBLIC TRANSPORTATION 2014 STANDARD

SPECIFICATION FOR CONSTRUCTION OF HIGHWAY, STREETS AND BRIDGES (TSDHPT)

Item 666 Retroreflectorized Pavement

Item 668 Prefabricated Pavement Markings

Item 672 Raised Pavement Markers

Markings And Markers

Item 678 Pavement Surface Preparation for type materials. All striping and restriping will adhere to TxDOT Pavement Marking Handbook revised Aug 2004.

Survey existing conditions before placements of paving markings. If existing condition is found to be not in alignment with the centerline of the travel way, then notify the COR immediately. Any markings placed without prior notice of the COR and found to be out of alignment shall be replaced to government approval at no cost to the government.

Unless noted on the plans or with given approval by the COR;

existing striping that is to be restriped shall be completely removed per TxDOT Pavement Marking Handbook and TxDOT Specification section 677.

prior to acceptance.

Reference TSDHPT Item 666 Retroreflectorized Pavement Markings paragraphs

666.1 thru 666.5. Paragraph 666.2. (3) Source of Supply, specifies that all Type II marking material paints shall be purchased from the Department. Disregard this requirement. All Type II marking material paints shall be purchased from the open market. The scope of work for pavement striping and marking with paint material and thermoplastic material shall also include symbols and letters for example: turning and straight ahead arrows, and stop ahead lettering.

Type I Marking Materials: Furnish in accordance with DMS-8220, “Hot Applied Thermoplastic.”

B. Type II Marking Materials: Furnish in accordance with DMS-8200, “Traffic Paint.”

Glass Traffic Beads: Furnish drop-on glass beads conforming to DMS- 8290, “Glass Traffic Beads.”

Type I Markings: Furnish Type III drop-on glass beads. Furnish Type II or double-drop of Type II and Type III drop-on glass beads where each type bead is applied separately in equal portions (by weight), only when specified in the plans. When furnishing a double-drop system, apply the Type III beads before applying the Type II beads.

Type II Markings: Furnish Type III drop-on glass beads or other beads specified on the plans.

Labeling: Use clearly marked containers that indicate color, mass, material type, manufacturer, and batch number.

General Requirements: Is maintained in satisfactory condition, meets or exceeds the requirements of the National Board of Fire Underwriters and the RRC for this application, uses an automatic bead dispenser attached to the pavement marking equipment, and can provide continuous mixing and agitation of the pavement marking material. Provide a hand-held thermometer capable of measuring the temperature of the marking material when applying Type I material.

Material Placement Requirement: Use equipment that can place: At least 40,000 ft. of 4-in. solid or broken markings per day at the specified thickness; linear markings up to 8 in. wide in a single pass; markings other than solid or broken lines; a center-line and no-passing barrier-line configuration consisting of 1 broken line with 2 solid lines at the same time to the alignment, spacing, and thickness shown on the plans, for 3-line application; white line from both sides; lines with clean edges, uniform cross section and thickness, and reasonably square ends;

skip lines between 10 and 10-1/2 ft., an approximate stripe-to- gap ratio of 1 to 3, and a stripe-gap cycle between 39-1/2 ft. and 40- 1/2 ft., automatically; beads uniformly and almost instantly on the marking as the marking is being applied; beads uniformly during the application of all lines (each line must have an equivalent bead yield rate and embedment); and double-drop bead applications using both Type II and Type III beads from separate independent bead applicators, if double-drop bead application is used.

Place markings before opening to traffic unless short term or work zone markings are allowed.

General: Obtain approval for the sequence of work and estimated daily production. On roadways already open to traffic, place markings with minimal interference to the operations of that roadway. Use traffic control as shown on the plans or as approved. Protect all markings placed under open-traffic conditions from traffic damage and disfigurement.

Establish guides to mark the lateral location of pavement markings as shown on the plans or as directed, and have guide locations verified. Use material for guides that will not leave a permanent mark on the roadway.

Apply markings on pavement that is completely dry and passes the following tests:

Type I Marking Application—Place a sample of Type I marking material on a piece of tarpaper placed on the pavement.

Allow the material to cool to ambient temperature, and then inspect the underside of the tarpaper in contact with the pavement. Pavement will be considered dry if there is no condensation on the tarpaper.

Type II Marking Application—Place a 1-sq. ft. piece of clear plastic on the pavement, and weight down the edges.

The pavement is considered dry if, when inspected after 15 min., no condensation has occurred on the underside of the plastic.

Apply markings: that meet the requirements of Tex-828-B, using widths and colors shown on the plans, at locations shown on the plans, in proper alignment with the guides without deviating from the alignment more than 1 in. per 200 ft. of roadway or more than 2 in. maximum, without abrupt deviations, free of blisters and with no more than 5% by area of holes or voids, with uniform cross section and thickness, with clean and reasonably square ends, that are reflectorized, and using personnel skilled and experienced with installation of pavement markings.

Remove all applied markings that…