36C78619Q0257-003.pdf

SPECIFICATIONS

Fort Bliss National Cemetery El Paso, TX

CLEAN DRYWELLS

AND

SEAL ROADS

Prepared by:

Rodney Duich, P.E.

NCA Continental District

Department of Veterans Affairs

00 01 10-1

DEPARTMENT OF VETERANS AFFAIRS

TABLE OF CONTENTS

Section 00 01 10

DIVISION 00 - SPECIAL SECTIONS DATE

00 01 15 List of Drawing Sheets

DIVISION 32 – EXTERIOR IMPROVEMENTS

32 12 36 Slurry Seal 32 17 23 Pavement Markings

00 01 15 - 1

SECTION 00 01 15

LIST OF DRAWING SHEETS

The drawings listed below accompanying this specification form a part of the contract.

Drawing No. Title

X-1 COVER SHEET, LOCATION MAP, SITE PLAN, & SHEET INDEX

X-2 GENERAL NOTES

C-1 OVERALL SITE PLAN - DRYWELL CLEANING SITES #1 THROUGH #7

C-2 DRYWELL AREA 1, SITES #1, #2, & #3 (ENLARGED SITE PLAN)

C-3 DRYWELL AREA 2, SITES #4, #5, #6, & #7 (ENLARGED SITE PLAN)

C-4 DRYWELL CLEANING AND DEBRIS REMOVAL DETAILS

C-5 ORIGINAL DRYWELL CONSTRUCTION DETAILS (REFERENCE)

C-6 ROAD CRACK AND SURFACE SEALING

C-7 PARKING AREA STRIPING AND MARKING DETAILS

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SECTION 32 12 36

SLURRY SEAL (POLYMER MODIFIED)

PART 1 - GENERAL

1.1 DESCRIPTION

A. Work on this Section includes applying a mixture of polymer modified asphaltic emulsion, aggregate, set-control additives, and water spread on a surface or pavement.

1.2 SUBMITTALS

A. Data and Test Reports:

1. Submit laboratory report:

a. Test results used in the mix design

b. Proportion of the following material based on the aggregate's dry weight

i. Aggregate

ii. Filler determined from tests, minimum and maximum

iii. Water, minimum and maximum

iv. Asphalt solids content

v. Set control agent

c. Comparison of slurry seal test results to the specified values

2. Mix Design

3. Daily Moisture data as required by Oklahoma DOT Standard

Specifications.

4. Aggregates:

a. Gradation

b. Sand Equivalent

c. Durability Index

B. Certifications:

1. Experience: The contractor shall certify that their superintendent has at least 2 years’ experience of the application of a slurry seal.

2. Water: The contractor shall certify that the water is from a potable source.

C. Provide SDS (Safety Data Sheets) for all chemicals used on ground.

1.3 MIX DESIGN

A. At least 7 working days before slurry seal placement commences, the

Contractor shall submit for approval a laboratory report of tests and proposed mix design covering the specific materials to be used on the project.

1. The mix design shall comply with the requirements of AASHTO M

208, except that the cement mixing test requirement is excluded.

B. The tests and mix design shall be performed by a laboratory capable of performing the applicable International Slurry Seal Association (ISSA) tests.

1. Mixing test must pass at the maximum expected air temperature at the project site during application.

2. Using project source aggregate asphalt emulsion and set-control agents if used.

C. The laboratory report shall be signed by the laboratory that performed the tests and mix design and shall show the results of the tests on individual materials, comparing the test results to those required by the specifications. The report shall clearly show the proportions of aggregate, filler (as determined from the tests, minimum and maximum), water (minimum and maximum), asphalt solids content based on the dry weight of aggregate, and set-control agent usage. Previous laboratory reports covering the same materials may be accepted provided they are made during the same calendar year.

1.4 PROPORTIONING

A. Proportion slurry seal ingredients in compliance with the authorized mix design. Proportion and blend different aggregate types before adding other ingredients.

B. Asphalt emulsion shall be added at a rate determined by the mix design and within the range specified. A job mix design shall be submitted by the Contractor for approval that conforms to the specification limits, and that is suitable for the traffic, climate conditions, curing conditions and final use. This will include recommended application rate of slurry to suit the job conditions.

C. The Slurry Seal mixture shall be proportioned by the operation of a single start/stop switch or lever, which automatically sequences the introduction of aggregate, emulsified, asphalt, admixtures, if used, and water to the pug mill.

D. Calibrated flow meters shall be provided to measure both the addition of water and liquid additives to the pug mill. If necessary for workability, a retarding agent, that will not adversely affect the seal, may be used.

E. Water, and retarder if used, shall be added to ensure proper workability and permit uncontrolled traffic on the slurry seal no more than three (3) hours after placement without the occurrence of bleeding, raveling, separation or other distress and also prevent development of bleeding, raveling, separation of other distress within fifteen (15) days after placing the slurry seal.

1.5 MATERIAL SAMPLING

A. The minimum acceptable sampling frequency shall be as follows:

1. Asphalt Emulsion – minimum once daily

2. Mineral Aggregate – minimum once weekly

3. Application mixture - minimum once daily B.

B. All Samples of asphalt emulsion and aggregate for slurry seal shall be captured from the storage tank of the slurry seal application truck in use on the work. Inspector shall observe the sampling of 1 gallon of the emulsion, 10 lbs. of the slurry seal aggregate and 1 gallon of the mixture. Contractor shall provide the samples and containers to the Inspector.

PART 2 - PRODUCTS

All materials shall meet the requirements of the Texas Department of

Transportation Standard Specifications.

2.1 AGGREGATE FOR SLURRY SEAL

A. The aggregate shall be a Type II Aggregate crushed gravel or crushed stone meeting the requirements of the Texas Department of

Transportation Standard Specification Item 302, Aggregates for

Surface Treatments. Limestone aggregates shall not be used as mineral aggregate. The aggregate shall meet the following gradation requirements:

Table 1 Type II

Sieve Size, (mm) Percent Passing (by weight)

3/8" (9.5) 100 #4 (4.75) 90 - 100 #8 (2.36) 65 - 90 #16 (1.18) 45 - 70 #30 (0.600) 30 – 50 #50 (0.300) 18 - 30 #100 (0.150) 10 - 21 #200 (0.075) 5 – 15

Residual Asphalt Content, % weight of dry aggregate 7.5-13.5

Application rRate, lb/sq.yd Based on mass of dry agg. 10-15

Los Angeles Test (AASHTO 6) 35 max.

Sand Equivalent Test (AASHTO T 176) 45 min.

B. The amount of smooth-textured sand of less than 1.25 percent water absorption is limited to not more than 50 percent of the total combined aggregate.

2.2 APHALT EMULSION

A. The polymer modified emulsified asphalt shall be LMCQS - 1h that has been modified to meet the following requirements by addition of polymers:

Table 1 Min. Max.

Viscosity, Saybolt Furol at 77° F (25° C), Sec.: 20 100 Test Method: ASTM D244

Storage stability test, one day 1%

Particle Charge test: Positive

Sieve test, percent: 0.1

Distillation*:

Oil distillate, by vol. of emulsion, %: 0.5

Residue from distillation: 62.0

Polymer Solids, percent 3.0

Penetration, 77° F (25° C), 100 g, 5 sec.: 55 90 Test Method: ASTM D5

Ductility, 77° F (25° C), 5 cm/min., cm: 70 Test Method: ASTM D113

Solubility in tricholoroethylene: 97%

Softening point, R. & B., ° F 135° (57º C) Test Method: ASTM

Polymer Content (by weight) > 2.5%

* The standard distillation procedure shall be modified as follows: The temperature on the lower thermometer shall be brought slowly to 349° F ± 11° F (176° C ± 6°C) and maintained at this point for 20 minutes. Complete the total distillation in 60 ± 5 minutes from the application of heat.

B. The polymer modified emulsified asphalt slurry seal shall be so formulated that when the paving mixture is applied with the relative humidity at not more than 50% and ambient air temperature of at least

77° F (25° C), it will cure sufficiently that rolling traffic can be allowed to use the surface in one hour with no damage to the surface.

2.3 MINERAL FILLER

A. Mineral filler shall be Portland Cement, hydrated lime, limestone dust, fly ash, or other approved filler which meets the requirements of

AASHTO M 17. Portland cement shall be a commercial quality, non-air-entraining cement and shall not be considered as mineral filler for the purpose of satisfying the gradation requirement of the aggregate.

2.4 WATER

A. Water should be potable, free of soluble salts and of such quality that the asphalt will not separate from the emulsion before the slurry seal is placed.

2.5 STOCKPLILING AND STORAGE

A. If the mineral aggregates are stored or stockpiled, they shall be handled in such a manner as to prevent segregation, mixing of the various materials or sizes, and contamination with foreign materials.

The grading of aggregates supplied to the mixing plant shall be uniform. Suitable equipment of acceptable size shall be furnished by the Contractor to work the stockpiles and prevent segregation of the aggregates. Stockpile & Storage location may not be available at the work site. The Contractor is responsible for determining storage locations before submission of bid/proposal.

B. The asphalt material storage shall be ample to meet the requirements of the plant. Asphalt emulsion shall not be heated to a temperature in excess of 160° F (71° C). All equipment used in the storage and handling of asphalt material shall be kept in a clean condition at all times and shall be operated in such manner that there will be no contamination by foreign matter.

PART 3 - EXECUTION

3.1 MIXING AND SPREADING EQUIPMENT

A. All equipment used for materials handling and mixing and placing of mixture shall be maintained in good repair and operating condition and subject to the approval of the Contracting Officer. Any equipment found to be defective with a potential for affecting the quality of the paving mixture will be rejected by the Contracting

Officer and must be replaced or repaired before its use or continued use.

B. The material shall be mixed by a self-propelled mixing machine which shall be a continuous flow mixing unit able to accurately deliver and proportion the aggregate, emulsified asphalt, mineral filler, additives, and water to a revolving multi-blade mixer and discharge the mixed product on a continuous flow basis. The machine shall have sufficient storage capacity for aggregate, emulsified asphalt, mineral filler, and water to maintain an adequate supply to the proportioning controls. The machine shall be equipped with self-loading devices which provide for the loading of all materials while continuing to lay slurry seal, thereby minimizing construction joints.

C. Individual volume or weight controls for proportioning each material to be included in the mixture shall be provided. Each material control device shall be calibrated and properly marked.

D. Calibration shall be performed prior to starting the project and in the presence of the Contracting Officer. Documentation shall be included for each individual calibration of material at the various settings, which can be related to the machine's metering devices.

The machine will be equipped with a metering device for the mineral filler which indicates the quantity used. No machine will be allowed to work on the project until it has met all the requirements of

TxDOT Item 520 and the calibration has been completed and/or accepted.

E. Calibration shall be verified by the Contractor using Tex-922-K Part

III under observation by the COR.

F. The emulsion pump shall be a positive displacement type and shall be equipped with a revolution counter or similar device so that the amount of emulsion used may be determined at any time.

G. The mixing machine shall be equipped with a water pressure system and nozzle type spray bar to provide a water spray immediately ahead of and outside the spreader box.

H. The mixing machine shall be equipped with an approved fines feeder and liquid additives feeder that shall provide a uniform, positive, accurately metered, predetermined amount of the specified mineral filler.

3.2 SEASONAL LIMITATIONS

A. No slurry seal shall be placed after October 15 or before May 1 without prior approval by the Contracting Officer. Slurry seal shall not be applied if either the pavement or ambient temperature is 55°

F (13° C) or less.

3.3 SURFACE PREPARATION

A. If cracks in the existing pavement are from 1/8 to 1 inch wide, treat the cracks in accordance with contract specifications. Do not place the slurry seal until the COR determines that the crack treatment is cured.

B. Before you place slurry seal, clean the pavement surface. Remove loose particles of extraneous materials, including paving and dirt. Use any nondestructive method, such as flushing or sweeping.

C. Before applying slurry seal, cover manholes, valve and monument covers, grates, or other exposed facilities located within the area of application, using a plastic or oil resistant construction paper secured by tape of adhesive to the facility being covered. Reference the covered facilities with a sufficient number of control points to relocate the facilities after the application of the seal coat. In areas inaccessible to spreading equipment, spread the slurry seal mixture with hand tools or other authorized methods. If placing with hand tools, first lightly dampen the area. Do not handle or shift the material.

3.4 PLACEMENT

A. Workmanship. No excessive buildup, uncovered areas or unsightly appearance will be permitted at longitudinal or transverse joints.

B. Longitudinal joints shall be placed at lane lines. Excessive overlap will not be permitted. Care shall be taken to ensure straight lines along the roadway centerline, lane lines, shoulder, or curb lines.

Lines at intersections shall be kept straight to provide a good appearance. Care shall be exercised in areas that require hand work so that the finished surface is uniform in texture, density, and of overall appearance comparable to that produced by the spreader box.

C. Areas of non-uniform texture, density, or appearance will be patched as directed. Patching shall be done using the same process and equipment that originally surfaced the area. Hand working of patches will not be permitted, except as authorized by the Contracting

Officer.

D. The Contractor shall supervise and direct the work, using their best skill and attention. The work shall be directed using any means as is the custom of the trade to complete the work in an acceptable manner.

3.5 PROTECTION

A. Traffic Control. It shall be Contractor's responsibility to provide adequate traffic control measures, such as barricades, cones, advance warning signs, flagmen, etc., to protect the uncured slurry seal from all types of traffic and to provide traffic safety in the construction area. These measures shall be employed in a safe manner and must not be used until approved by the Contracting Officer. The Contractor shall leave half of the roadway available for cemetery traffic at all times. The Contractor shall coordinate with the COR to plan work in parking areas.

B. Opening the roadway surface to traffic does not constitute acceptance of the work. Any damage to the uncured slurry seal material will be the responsibility of the Contractor and the damaged surface shall be repaired to the satisfaction of the Contracting Officer.

3.6 FINAL CLEAN-UP

A. Remove all debris, rubbish, and excess material from the work area.

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32 17 23 - 1

SECTION 32 17 23

PAVEMENT MARKINGS

PART 1 - GENERAL

1.1 DESCRIPTION

This work shall consist of furnishing and applying paint and reflective glass beads on pavement surfaces, in the form of parking bays, areas restricted to handicapped persons, and other detail pavement markings, in accordance with the details as shown. Conform to the Manual on Uniform

Traffic Control Devices for Streets and Highways, published by the U.S.

Department of Transportation, Federal Highway Administration, for details not shown.

1.2 SUBMITTALS

In accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND

SAMPLES, furnish Manufacturer's Certificates and Data certifying that the following materials conform to the requirements specified.

A. Paint.

B. Reflective Glass Beads

1.3 APPLICABLE PUBLICATIONS

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

B. Federal Specifications (Fed. Spec.):

TT-B-1325C..............Beads (Glass Spheres); Retro-Reflective

TT-P-1952D..............Paint, Traffic Black, and Airfield Marking, Waterborne

C. Master Painters Institute (MPI):

No. 97-2007.............Latex Traffic Marking Paint

PART 2 - PRODUCTS

2.1 PAINT

Paint for marking pavement (parking lot and zone marking) shall conform to

MPI No. 97, color as shown. Paint for obliterating existing markings shall conform to Fed. Spec. TT-P-1952D. Paint shall be in containers of at least

5 gallons. A certificate shall accompany each batch of paint stating compliance with the applicable publication.

2.2 REFLECTIVE GLASS BEADS

Beads shall conform to Fed. Spec. TT-B-1325C, Type I, Gradation A. When used in regions of high humidity, coat beads with silicone or other

32 17 23 - 2 suitable waterproofing material to assure free flow. Furnish the glass beads in containers suitable for handling and strong enough to prevent loss during shipment. A certificate shall accompany each batch of beads stating compliance with this section.

2.3 PAINT APPLICATOR

Apply all marking by approved mechanical equipment. The equipment shall have manual control to apply continuous lines of varying length and marking widths as shown. Provide pneumatic spray guns for hand application of paint in areas where a mobile paint applicator cannot be used. If the equipment does not have a glass bead dispenser, use a separate piece of equipment.

Adjust and synchronize the equipment with the paint applicator so that the reflective beads are distributed uniformly on the paint lines within ten seconds without any waste. An experienced technician that is thoroughly familiar with equipment, materials, and marking layouts shall control all painting equipment and operations.

2.4 SANDBLASTING EQUIPMENT

Sandblasting equipment shall include an air compressor, hoses, and nozzles of proper size and capacity as required for cleaning surfaces to be painted. The compressor shall furnish not less than 150 cfm of air at a pressure of not less than 90 psi at each nozzle used.

PART 3 - EXECUTION

3.1 SURFACE PREPARATION

A. Allow new pavement surfaces to cure for a period of not less than 14 days before application of marking materials.

B. Thoroughly clean all surfaces to be marked before application of paint.

Remove dust, dirt, and other granular surface deposits by sweeping, blowing with compressed air, rinsing with water, or a combination of these methods. Completely remove rubber deposits, existing paint markings, and other coatings adhering to the pavement with scrapers, wire brushings, sandblasting, mechanical abrasion, or approved chemicals. The application of paint conforming to Fed. Spec. TT-P-1952 is an option to removal of existing paint markings on asphalt pavement.

Apply the black paint in as many coats as necessary to completely obliterate the existing markings. Where oil or grease are present on old pavements to be marked, scrub affected areas with several applications of trisodium phosphate solution or other approved detergent or

32 17 23 - 3 degreaser, and rinse thoroughly after each application. After cleaning, seal oil-soaked areas with cut shellac to prevent bleeding through the new paint. Pavement marking shall follow as closely as practicable after the surface has been cleaned and dried, but do not begin any marking until the COR has inspected the surface and gives permission to proceed.

The Contractor shall establish control points for marking and provide templates to control paint application by type and color at necessary intervals. The Contractor is responsible to preserve and apply marking in conformance with the established control points.

3.2 APPLICATION

Apply uniformly painted and reflective pavement marking of required color(s), length, and width with true, sharp edges and ends on properly cured, prepared, and dried surfaces in conformance with the details as shown and established control points. The length and width of lines shall conform within a tolerance of plus or minus 3 inches and plus or minus 1/8 inch, respectively. The length of intervals shall not exceed the line length tolerance. Temperature of the surface to be painted and the atmosphere shall be above 50F and less than 95F. Apply the paint at a wet film thickness of 0.015 inch. Disperse reflective glass beads evenly on the wet paint at a rate of 6 pounds per gallon) of paint. Apply paint in one coat. At the direction of the COR, markings showing light spots may receive additional coats. The maximum drying time requirements of the paint specifications will be strictly enforced, to prevent undue softening of asphalt, and pick-up, displacement, or discoloration by tires of traffic.

If there is a deficiency in drying of the marking, discontinue paint operations until cause of the slow drying is determined and corrected.

Remove and replace marking that is applied at less than minimum material rates; deviates from true alignment; exceeds stipulated length and width tolerances; or shows light spots, faulty distribution of beads, smears, or other deficiencies or irregularities. Use carefully controlled sand blasting, approved grinding equipment, or other approved method to remove marking so that the surface to which the marking was applied will not be damaged.

3.3 PROTECTION

Conduct operations in such a manner that necessary traffic can move without hindrance. Protect the newly painted markings so that, insofar as possible, the tires of passing vehicles will not pick up paint. Place warning signs at the beginning of the wet line, and at points well in advance of the marking equipment for alerting approaching traffic from both directions.

32 17 23 - 4

Place small flags or other similarly effective small objects near freshly applied markings at frequent intervals to reduce crossing by traffic.

Efface and replace damaged portions of markings at no additional cost to the Government.

3.4 DETAIL PAVEMENT MARKING

Use Detail Pavement Markings, exclusive of actual traffic lane marking, at exit and entrance islands and turnouts, on curbs, at crosswalks, at parking bays, and at such other locations as shown. Show the International

Handicapped Symbol at indicated parking spaces. Color shall be as shown.

Apply paint for the symbol using a suitable template that will provide a pavement marking with true, sharp edges and ends. Place detail pavement markings of the color(s), width(s) and length(s), and design pattern at the locations shown.

3.5 FINAL CLEAN-UP

Remove all debris, rubbish and excess material from the Station.

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