Technical Exhibit D - Special Provision 350.pdf

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

Technical Exhibit “D”

FY21 MICROSURFACING PACKAGE

SPECIAL PROVISION

January 8, 2021

Contract No. W91151‐21‐C‐XXXX

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

Fort Hood, TX 76544

350-002

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Special Provision to Item 350

Microsurfacing

Item 350, “Microsurfacing” of the Standard Specifications is amended with respect to the clauses cited below. No other clauses or requirements of this Item are waived or changed.

Article 350.2., “Materials,” Section 2.1., “Cationic Polymer-Modified Asphalt Emulsion,” is voided and replaced by the following.

2.1. Cationic Polymer-Modified Asphalt Emulsion. Provide CSS-1P in accordance with Section 300.2.4., “Emulsified Asphalt,” or CSS-1EP meeting the requirements and in accordance with Table A.

Table A

Polymer-Modified Cationic Emulsified Asphalt

Property Test Procedure

Emulsion

CSS-1EP

Min Max

Asphalt Base Properties

Original DSR, kPa (G*/sinδ, 10 rad./sec) @ 76⁰C T 315 1.00

Emulsion Properties

Viscosity, Saybolt-Furol, @ 122⁰F, SFS T 59 15 150

Sieve Test, % T 59 0.1

Storage Stability, 1 day, % T59 1

Distillation Test

Residue by distillation, % by weight T 59 62

Oil distillate, % by volume of emulsion 0.5

Tests on Residue Properties from Low Temp Evaporation (AASHTO R-781):

MSCR @ 70⁰C, Recovery @ 3.2 kPa,% MSCR @ 70⁰C, Jnr @ 3.2, 1/kPa ODSR, kPa (G*/sin δ, 10 rad./sec) @ 76°C ODSR, deg (phase angle δ, 10 rad./sec) @ 76°C

T 350 T 350 T 315

0.50

1. After recovering the residue from AASHTO R‐78, the sample may be annealed before testing to remove any excess moisture and provide for a consistent sample. The annealing can be accomplished by placing 20 g of residue in a 6 oz. metal container (approx. 3 in. diameter) and heating to 163°C for no more than 15 min. The sample should be stirred with a spatula, every 5 min. The sample can then be poured directly into a 25 mm DSR silicone mold for evaluation.

Article 350.3., “Equipment,” Section 3.1., “Mixing Machine,” is voided and replaced by the following.

3.1. Mixing Machine. Furnish a self-propelled microsurfacing mixing machine with:

self-loading devices to promote continuous laying operations;

enough storage capacity for mixture materials;

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;

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;

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

a spreader box with a front seal, adjustable rear strike-off, and adjustable secondary rear strike-off; and an electronic monitoring system:

• consisting of pulse sensors to measure delivery rates, radar gun to monitor distance traveled, programmable micro-controller with operator’s display/input board, and on-board printer;

• capable of recording, monitoring, and displaying the amount of aggregate, emulsion, mineral filler, water, and additives, in pounds;

• capable of displaying and recording ratios of emulsion to aggregate, mineral filler to aggregate, additive to aggregate, water to aggregate, and application rate in pounds per square yard;

• capable of recording the percentages of emulsion, mineral filler, water, and additive;

• capable of printing a hard copy report on demand that displays the date and the cumulative weight of aggregate, emulsion, and mineral filler in pounds and the number of gallons of additive and water; the percentages of emulsion, mineral filler, water, and additive; and the ratios of emulsion to aggregate, mineral filler to aggregate, additive to aggregate, water to aggregate, and application rate in pounds per square yard since the last reset; and

• accurate to within 0.5% of actual weights and measures.

Calibrate and properly mark each control device that proportions the individual materials.

Article 350.4., “Construction,” is supplemented by the following.

Maintain on the project at least one responsible employee certified under the AASHTO Microsurfacing Certification Program for personnel.

Article 350.4., “Construction,” Section 4.1., “Mixture Design.” The first paragraph is voided and replaced by the following.

Provide a mixture design meeting the proportions shown in Table 3 and the requirements shown in Table 4. Perform the mixture design using an AASHTO-accredited laboratory experienced in the design of microsurfacing systems. Provide the Engineer with representative samples of all component materials for verification of the mixture design, unless otherwise directed. Identify additives used to control mixture set times and cohesion, as determined by design testing, and provide acceptable limits. The Materials and Tests Division will verify the mixture design to ensure it meets the minimum requirements for wet track abrasion wear value listed in Table 4. Provide the Engineer with approximately 40 lb. of each aggregate stockpile, at least 1 gal. of asphalt emulsion, at least 1 gal. of mineral filler, and enough quantities of any additives proposed for use.

Article 350.4., “Construction,” Section 4.1., “Mixture Design,” is supplemented by the following.

Changes in aggregate source, emulsion source, or mineral filler will require a new mixture design submitted for the Engineer’s approval. The Engineer may require a new test strip if there is a change in aggregate source, emulsion source, or mineral filler.

Article 350.4., “Construction,” Section 4.8., “Placing.” The first sentence of the paragraph is voided and replaced by the following.

Make necessary adjustments so that the mixture will have enough working life to allow for proper placement, with considerations for aggregate moisture and at the predicted ambient temperature and humidity.

Article 350.4., “Construction,” Section 4.10., “Production Testing,” is voided and replaced by the following.

4.10. Production Testing. Control the production process within the operational tolerances listed in Tables 5A and 5B. Provide access to the mixing unit discharge stream for sampling purposes. Suspend production when the Engineer’s test results exceed the operational tolerances. The Engineer will allow production to resume when test results or other information indicate the next mixture produced will be within the operational tolerances listed and in accordance with Tables 5A and 5B. Take corrective action to address deficiencies.

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Table 5A

Operational Tolerances

Property Test Method Requirements

Asphalt content, % by wt.

Tex-236-F1 or asphalt meter readings Design target 0.5

1. Dried to constant weight at 230 ± 10°F

Table 5B

Washed Gradation % Passing Operational Tolerances1

Sieve Size2 Requirement3

3/8" ±5

#4 ±5

#8 ±5

#16 ±3

#30 ±3

#50 ±3

#100 ±3

#200 ±3

1. Tex-200-F, Part II, sampled from stockpile or belt.

2. Material passing #200 sieve including the mineral filler must conform to the limitations of the master gradation shown in Table 1.

3. Gradations must meet both the Master Gradation Band, listed in Table 1, and the operational tolerance from mixture design.

The asphalt content may be reduced below the tolerance when lean mixes are necessary for scratch and rut passes, but not less than the design minimum shown for the wet track abrasion test when approved.

Article 350.4., “Construction,” Section 4.15., “Test Section,” is added.

4.15. Test Section. At the beginning of the first day of production, place a test strip with a minimum length of 500 ft. meeting the mixture design tolerances to demonstrate the mixing and placement procedures. Place the test strip at the same general time of day (night or day) the paving is to take place. Inspect the test strip for variations in surface texture, material ratios, finished surface appearance, and ability to carry normal traffic within 60 min. The Engineer will approve or reject the test strip within 2 hr. of placement. If rejected, the Engineer may require another test strip after the Contractor corrects any deficiency. Paving may proceed after the Engineer approves the test strip.

Article 350.4., “Construction,” Section 4.16., “Quality Control,” is added.

4.16. Quality Control. Produce a mixture according to the mixture design and the quality control tolerances.

Randomly calculate and report to the Engineer the percent asphalt content of the mixture and the yield of the aggregate from the equipment computer display readings at least three times daily.

Maintain quality and provide to the Engineer a report and log sheet containing the following information:

aggregate used, ton (dry);

microsurfacing emulsion used, ton;

bituminous materials for tack coat used, if specified, ton;

mineral filler used, pound;

water used in mixture, gallon;

additive used in mixture, gallon;

surface area completed, square yard;

surface area application rate, dry pound. aggregate per square yard; and percentage of emulsified asphalt based on dry aggregate.

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Test the aggregate for moisture content each day before placement or when aggregate moisture changes due to rainfall events or new material delivery or as directed. Enter the percent moisture determined in the electronic monitoring system.

Item 350

Microsurfacing

1. DESCRIPTION

Furnish and place a microsurfacing system consisting of a mixture of cationic polymer-modified asphalt emulsion, mineral aggregate, mineral filler, water, and other additives.

2. MATERIALS

Furnish uncontaminated materials of uniform quality that meet the requirements of the plans and specifications. Provide the Engineer with representative samples of all component materials for verification.

Notify the Engineer of all material sources and before changing any material source or formulation. The Engineer will verify that the specification requirements are met when the Contractor makes a source or formulation change, and may require a new laboratory mixture design, trial batch, or both. The Engineer may sample and test project materials at any time during the project to verify specification compliance in accordance with Item 6, “Control of Materials.”

2.1. Cationic Polymer-Modified Asphalt Emulsion. Provide CSS-1P in accordance with Section 300.2.4., “Emulsified Asphalt.”

2.2. Aggregate. Furnish crushed aggregate from a single source meeting the requirements of Table 1 and Table 2. Determine aggregate gradations for mixture design and production testing based on the washed sieve analysis given in Tex-200-F, Part II. Aggregate from sources listed in the Department’s Bituminous Rated Source Quality Catalog (BRSQC) are preapproved for use.

For sources not listed on the Department’s BRSQC:

build an individual stockpile for each material;

request the Department test the stockpile for specification compliance; and once approved, do not add material to the stockpile unless otherwise approved.

Allow 30 calendar days for the Engineer to sample, test, and report results for non-listed sources. Do not combine approved material with unapproved material. Include the amount of mineral filler added to the mix in determining the total minus No. 200 aggregate fraction.

Table 1 Master Gradation Limits

(% Passing by Weight or Volume)

Sieve Size % Passing

3/8" 100.0

#4 86.0–94.0

#8 45.0-65.0

#16 25.0-46.0

#30 15.0-35.0

#50 10.0-25.0

#100 7.0-18.0

#200 5.0-15.0 http://ftp.dot.state.tx.us/pub/txdot-info/cst/TMS/200-F_series/pdfs/bit200.pdf

Table 2 Aggregate Quality Requirements

Property Test Method Requirement

SAC

Tex-499-A

(AQMP)

A1

Magnesium sulfate soundness, 5 cycles, %, Max Tex-411-A 25

Crushed face count,2 %, Min Tex-460-A, Part I 95

Sand equivalent, %, Min Tex-203-F 70

Acid insoluble, (%), Min Tex-612-J 55

1. Surface Aggregate Classification of “A” is required unless otherwise shown on the plans.

2. Only applies to crushed gravel.

2.3. Mineral Filler. Provide a mineral filler that is sufficiently dry, free-flowing, and free of clumps and foreign matter consisting of non-air-entrained cement meeting the requirements of DMS-4600, “Hydraulic Cement,” or hydrated lime meeting the requirements of DMS-6350, “Lime and Lime Slurry.”

2.4. Water. Provide water that is potable and free of harmful soluble salts.

2.5. Other Additives. Use approved additives as recommended by the emulsion manufacturer in the emulsion mix or in any of the component materials when necessary to adjust mix time in the field.

2.6. Tack Coat. Furnish CSS-1H or SS-1H for tack coat binder in accordance with Item 300, “Asphalts, Oils, and Emulsions.” Specialized or preferred tack coat materials may be allowed or required when shown on the plans. Do not dilute emulsified asphalts at the terminal, in the field, or at any other location before use.

3. EQUIPMENT

Maintain equipment in good repair and operating condition.

3.1. Mixing Machine. Furnish a self-propelled microsurfacing mixing machine with:

self-loading devices to promote continuous laying operations;

enough storage capacity for mixture materials;

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;

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;

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.

3.2. Scales. Scales used for weighing aggregates and emulsion must meet all requirements of Item 520, “Weighing and Measuring Equipment.” The weighing equipment for aggregates may be either a suspended hopper or a belt scale.

http://ftp.dot.state.tx.us/pub/txdot-info/cst/TMS/400-A_series/pdfs/cnn499.pdf http://ftp.dot.state.tx.us/pub/txdot-info/cst/TMS/400-A_series/pdfs/cnn411.pdf http://ftp.dot.state.tx.us/pub/txdot-info/cst/TMS/400-A_series/pdfs/cnn460.pdf http://ftp.dot.state.tx.us/pub/txdot-info/cst/TMS/200-F_series/pdfs/bit203.pdf http://ftp.dot.state.tx.us/pub/txdot-info/cst/TMS/600-J_series/pdfs/chm612.pdf http://ftp.dot.state.tx.us/pub/txdot-info/cst/DMS/4000_series/pdfs/4600.pdf http://ftp.dot.state.tx.us/pub/txdot-info/cst/DMS/6000_series/pdfs/6350.pdf

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

4. CONSTRUCTION

Produce, transport, and place microsurfacing as specified in this Item or as shown on the plans. Provide emulsion and aggregate that are compatible so that the mixing process will completely and uniformly coat the aggregate. Ensure that the finished surface has a uniform texture and the microsurface mat is fully adhered to the underlying pavement. The Engineer may perform production tests at any time during the project, as deemed necessary in accordance with Item 5, “Control of the Work.” Schedule and participate in a pre-paving meeting with the Engineer on or before the first day of paving unless otherwise directed.

4.1. Mixture Design. Provide a mixture design meeting the proportions shown in Table 3 and the requirements shown in Table 4. Provide the Engineer with representative samples of all component materials for verification of the mix design, unless otherwise directed. The Construction Division will verify the mixture design to ensure it meets the minimum requirements for wet track abrasion wear value listed in Table 4.

Provide the Engineer with approximately 40 lbs. of each aggregate stockpile, at least 1 gal. of asphalt emulsion, at least 1 gal. of mineral filler, and sufficient quantities of any additives proposed for use.

The Engineer may accept an existing mixture design previously used on a Department project but the mixture design may be subjected to annual verification using laboratory-produced mixes before starting the paving season. Production may begin at the Contractor’s risk without receiving the results from the Department’s verification if approved by the Engineer.

Table 3 Mixture Design Proportions

Material Proportion

Residual asphalt 6.0% to 9.0% by wt. of dry aggregate

Mineral filler (hydraulic cement or hydrated lime)

0.5% to 3.0% by wt. of dry aggregate

Field control additive As required to provide control of break and cure

Water As required to produce proper mixture consistency

Table 4 Mixture Design Requirements

Property Test Method Requirements

Wet track abrasion, g/sq. ft., Max wear value Tex-240-F, Part V 75

Gradation (aggregate and mineral filler) Tex-200-F, Part II (Washed) Table 1

Mix time, controlled to 120 sec. Tex-240-F, Part II Pass

Lateral displacement Specific gravity after 1,000 cycles of 125 lbs.

ISSA TB-147

5% Max

2.10 Max

Excessive asphalt by LWT Sand Adhesion

ISSA TB-109

50 g/ft2

(538 g/m2) Max

4.2. Reporting, Testing, and Responsibilities. Use Department-provided templates to record and calculate all test data pertaining to production testing. Obtain the current version of the templates at http://www.txdot.gov/inside-txdot/forms-publications/consultants-contractors/forms/site-manager.html or from the Engineer. The Engineer will immediately report to the Contractor any test results that fail to meet the specification requirements.

Note that mix placed after test results are available to the Contractor may be considered unauthorized work if the results require suspension of operations. Unauthorized work will be accepted or rejected at the discretion of the Engineer in accordance with Article 5.3., “Conformity with Plans, Specifications, and Special Provisions.”

http://ftp.dot.state.tx.us/pub/txdot-info/cst/TMS/200-F_series/pdfs/bit240.pdf http://ftp.dot.state.tx.us/pub/txdot-info/cst/TMS/200-F_series/pdfs/bit200.pdf http://ftp.dot.state.tx.us/pub/txdot-info/cst/TMS/200-F_series/pdfs/bit240.pdf http://www.txdot.gov/inside-txdot/forms-publications/consultants-contractors/forms/site-manager.html

4.3. Temporary Material Storage.

4.3.1. Aggregate Storage. Stockpile materials to prevent segregation or contamination. Remix stockpiles with suitable equipment when necessary to eliminate segregation. Use a scalping screen to remove oversize material while transferring aggregates to the mixing machine.

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

4.3.3. Asphalt Material Storage. Keep asphalt materials free from contamination.

4.4. Weather Limitations. The Contractor may pave any time the roadway has no standing water on the roadway surface, the roadway surface temperature is at least 60°F and the ambient temperature is at least 50°F and rising. Place mixtures only when the Engineer determines the roadway surface weather and moisture conditions are suitable. The Engineer may restrict the Contractor from paving if the ambient temperature is below 60°F and falling. Cease placement 24 hr. before the weather forecast (National Weather Service) predict temperatures below 32°F unless otherwise approved.

4.5. Surface Preparation. Prepare the surface by removing raised pavement markers and objectionable material such as moisture, dirt, sand, leaves, and other loose impediments from the surface before placing mixture.

Provide a water spray immediately ahead of the spreader box when required for existing surface conditions when tack coat is not required. Apply water at a rate that will dampen the entire surface without any free-flowing water ahead of the spreader box.

4.6. Tack Coat. Apply tack coat uniformly at the rate directed by the Engineer when shown on the plans. The Engineer will set the rate between 0.04 and 0.10 gal. of residual asphalt per square yard of surface area.

Apply the tack coat in a uniform manner to avoid streaks and other irregular patterns.

4.7. Material Transfer. Minimize construction joints by providing continuous loading of material during placement. Remove oversized material before transferring the aggregates to the mixing machine.

4.8. Placing. Make necessary adjustments so that the mixture will have sufficient working life to allow for proper placement at the predicted ambient temperature and humidity. Spread the mixture uniformly to the lines and grades shown on the plans or as directed by means of a mechanical type spreader box. Shift the spreader box when necessary to maintain proper alignment. Clean the spreader box regularly to prevent build up from occurring and 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. Clean strike-off regularly to prevent build up from occurring.

4.9. Curing. Protect the finished mat from traffic until the mixture cures and will not be damaged by traffic. Adjust mixture properties according to humidity conditions and ambient temperatures to allow traffic on completed travel lanes within 1 hr. after placement with no damage to the surface. Protect locations subject to sharp turning, stopping, and starting traffic for longer periods when necessary.

4.10. Production Testing. Control the production process within the operational tolerances listed in Table 5.

Provide access to the mixing unit discharge stream for sampling purposes. Suspend production when the Engineer’s test results exceed the operational tolerances. The Engineer will allow production to resume when test results or other information indicate the next mixture produced will be within the operational tolerances listed in Table 5.

Table 5 Operational Tolerances

Property Test Method Requirements

Asphalt content, % by wt.

Tex-236-F1 or asphalt meter readings

Design target 0.5%

Gradation (washed), % passing

Tex-200-F, Part II from stockpile

#8 sieve and larger: ±5 from design gradation.

#16 sieve and smaller: ±3 from design gradation2

1. Dried to constant wt. at 230°F ±10°F.

2. Material passing #200 sieve including the mineral filler must conform to the limitations of the master gradation shown in Table 1.

The asphalt content may be reduced below the tolerance when lean mixes are necessary for scratch and rut passes but not less than the design minimum shown for the wet track abrasion test when approved.

4.11. Workmanship. Immediately take corrective action if microsurfacing material is exhibiting evidence of poor workmanship, delayed opening to traffic, or surface irregularities, including excessive scratch marks, drag marks, tears, streaks, raveling, delamination, and segregation. The Engineer may allow placement to continue for no more than one day of production while taking appropriate action. Suspend paving if the problem still exists after one day until the problem is corrected to the satisfaction of the Engineer.

4.11.1. Finished Surface. Provide a finished surface with a uniform texture free from excessive scratch marks, tears, or other surface irregularities. Marks, tears, or irregularities are considered excessive if:

more than 1 is at least 1/4 in. wide and at least 10 ft. long in any 100 ft. of machine pull, more than 3 are at least 1/2 in. wide and more than 6 in. long in any 100 ft. of machine pull, or any are 1 in. wide or wider and more than 4 in. in length.

4.11.2. Construction Joints. Place mixture so that longitudinal joints on the surface course coincide with lane lines, or as directed. Provide longitudinal and transverse joints that are uniform and neat in appearance. Provide construction joints that have limited buildup and no gaps between applications. Joints with buildup will be considered acceptable if:

no more than 1/2-in. vertical space exists between the pavement surface and a 4-ft. straightedge placed perpendicular to the longitudinal joint and no more than 1/4-in. vertical space exists between the pavement surface and a 4-ft. straightedge placed perpendicular to the transverse joint.

4.11.3. Edges. Provide an edge along the roadway centerline, lane lines, shoulder, edge of pavement, or curb line that is uniform and neat in appearance. The edge is considered acceptable when:

it varies no more than ±3 in. from a 100-ft. straight line on a tangent section and it varies no more than ±3 in. from a 100-ft. arc on a curved section.

4.12. Miscellaneous Areas. Use a single-batch-type lay-down machine or other approved method to place materials on ramps or other short sections. Apply tack coat uniformly at the rate directed by the Engineer when shown on the plans or lightly dampen the surface with water before placing the mix when tack coat is not required. Provide 100% coverage that is uniform in appearance and comparable to that produced by the spreader box.

4.13. Ruts. Fill ruts, utility cuts, and depressions in the existing surface in a separate pass from the final surface when shown on the plans. Fill ruts as follows:

Fill irregular or shallow ruts less than 1/2 in. deep with a full-width scratch coat pass. Use a rigid primary strike-off plate unless otherwise approved.

Fill ruts 1/2 in. deep or deeper independently using a rut-filling spreader box that is at least 5 ft. wide.

Crown the spreader box to compensate for traffic compaction.

http://ftp.dot.state.tx.us/pub/txdot-info/cst/TMS/200-F_series/pdfs/bit236.pdf http://ftp.dot.state.tx.us/pub/txdot-info/cst/TMS/200-F_series/pdfs/bit200.pdf

Fill ruts deeper than 1-1/2 in. in multiple placements unless otherwise approved.

Cure each lift 24 hours before placement of the next lift when using multiple placements.

4.14. Repairs. Perform full width repairs unless otherwise directed.

5. MEASUREMENT

Microsurfacing will be measured by the ton of the composite microsurfacing mixture, which includes asphalt emulsion, aggregate, and mineral filler.

5.1. Aggregate. The quantity of aggregate used in the accepted portion of work will be measured by net ticket weight of each individual load of aggregate based on dry weight of aggregate. Weigh the aggregate at the project stockpile site unless otherwise approved. Use either a suspended hopper scale or a belt scale meeting the requirements of Item 520, “Weighing and Measuring Equipment.” The calculated weight of mineral filler based on the accepted portion of work will be used for measurement and included in the total aggregate weight.

5.2. Polymer-Modified Asphalt Emulsion. The quantity of polymer-modified asphalt emulsion in the accepted portion of work will be measured by the ton of material based on the accepted load tickets issued from the manufacturer. At the completion of the project, any unused emulsion will be weighed back and deducted from the accepted asphalt emulsion quantity delivered.

6. PAYMENT

The work performed and materials furnished in accordance with this Item and measured as provided under “Measurement” will be paid for at the unit bid price per ton for “Microsurfacing.” This price is full compensation for preparing the existing surface (including removing existing raised pavement markers);

furnishing, hauling, preparing, and placing materials; and equipment, labor, tools, and incidentals.

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