Exhibit_B_Tech_Specs_High_Density_Mineral_Bond_Final_10.5.2026.pdf

TECHNICAL SPECIFICATIONS

EXHIBIT B

HIGH DENSITY MINERAL BOND

1.0 GENERAL

Mineral aggregate and asphalt binder surface treatment installed as a High-Density Mineral Bond over a roadway surface.

1.1 REFERENCES

A. AASHTO R 9: Standard Recommended Practice for Acceptance Sampling Plans for Highway Construction

B. ANSI B74.8: Procedure to Ball Mill Test for Friability of Abrasive Grain

C. ASTM C 128: Standard Test Method for Density, Relative Density (Specific Gravity), and

Absorption of Fine Aggregate

D. ASTM C 170: Standard Test Method for Compressive Strength of Dimension Stone

E. ASTM C 1326: Standard Test Method for Knoop Indentation Hardness of Advanced Ceramics

F. ASTM D 1644: Standard Test Method for Nonvolatile Content (Solids by Weight)

G. ASTM D 2172: Standard Test Methods for Quantitative Extraction of Bitumen From

Bituminous Paving Mixtures

H. ASTM D 2196: Standard Test Method for Rheological Properties of Non-Newtonian materials by Rotational (Brookfield type) Viscometer

I. ASTM D 2486: Standard Test Method for determining wear resistance in cycles

J. ASTM D 2939: Standard Test Method for Emulsified Bitumens used as Protective

Coatings

K. ASTM D 3960: Standard Practice for Determining Volatile Organic Compound Content of Paints and Related Coatings

L. ASTM E 70: Standard Test Method for pH of Aqueous solutions with the Glass Electrode

M. AASHTO T 59: Standard Test Method for Testing Emulsified Asphalts

N. AASHTO T 111: Standard Test Method for Mineral Matter or Ash in Asphalt Materials

1.2 DEFINITIONS

A. Lot – The number of tons of High-Density Mineral Bond placed in a Production Day.

1.3 SUBMITTALS

A. Results of wear resistance test current within one calendar year.

B. Traffic control and notification plan.

C. Mix Design: 10 days prior to use.

D. Equipment: List of construction equipment to be used.

E. Certification from emulsion manufacturer stating the base emulsion meets the requirements of the High-Density Mineral Bond base emulsion in section 2.1 of this specification.

F. Certification from the manufacturer stating the completed High Density Mineral Bond meets the requirements of section 2.3 of this specification.

G. Warranty.

1.4 QUALITY ASSURANCE

A. Contractor has successfully completed at least five (5) projects of similar size and nature, using the same mix design as described in section 2. Provide a list of five (5) projects which used the mix design in section 2 and have demonstrated a five-year minimum proven performance on a bituminous surface. Acceptable performance after five-year period is no less than 70% residual coverage in the treated surface area.

B. Foreman of the crew has completed at least three (3) projects of similar size and nature.

C. Do not change the source of the emulsified asphalt or aggregate without supporting changes in the mix design.

D. Reject asphalt emulsion that does not meet requirements of this section.

E. Remove product found defective after installation and install acceptable product at no additional cost to the department.

1.5 WEATHER

A. Temperature:

1. Apply surface treatment material when air and roadbed temperatures in the shade are 45° Fahrenheit (°F) and rising.

2. Do not apply surface treatment material if pavement or air temperature is below 45° Fahrenheit (°F) and falling or if the finished product will freeze before 48 hours.

B. Moisture: Do not apply surface treatment material during rain or unsuitable weather.

1.6 NOTICE

A. Follow all applicable federal, state, and local laws, ordinances, regulations, and requirements governing public notice, traffic control notifications, and roadway closures. Give written notices at least 2 days prior to applying surface treatment material.

B. Indicate application time and when the surface can be used. Include a map signifying the specific area to be closed providing detailed directions.

C. Provide a minimum of two contacts that represent the Contractor with phone numbers which can be reached at any time during the project.

D. Should work not occur on specified day, send a new notice before the end of the day.

1.7 ACCEPTANCE

A. General:

1. Acceptance is by Lot.

2. If non-complying material has been installed and no price for the material is specified, apply price adjustment against cost of work requiring complying material as part of its installation.

3. Opening HDMB to vehicular traffic does not constitute acceptance.

4. Observation of Contractor’s field quality control testing does not constitute acceptance. Such testing; however, may be used by Engineer for acceptance.

B. Surface Treatment Material:

1. Paving Asphalt: Acceptance is not specified in this Section.

2. Aggregate Source: Verify suitability of aggregated source.

3. Mixture, Ready to Install: Lot size is the number of tons of High Density Mineral Bond placed in one day. Collect samples randomly and test for density, AASHTO T59

C. Independent Testing

1. The City reserves the right to obtain samples and perform independent testing of any material, aggregate, emulsion, or completed product through a qualified third-party testing agency. The Contractor shall provide reasonable access to materials and testing records. Costs associated with failed testing shall be borne by the Contractor.

D. Placement

1. Lot size is 1 lane mile. Sub-lot size is 0.1 lane mile.

2. Mat Appearance:

a. No runoff onto concrete curbs and shoulders

b. No streaking

c. No Light spots

d. No de-bonding due to road contaminants

E. Price Adjustment: Mat appearance defects may be accepted if a 2.5 percent price reduction is applied against the Lot for each condition not met. Maximum price reduction for the Lot is 5 percent. Street Department Director or designee may waive price adjustment if Contractor corrects deficiencies at no additional cost to the department.

1.8 WARRANTY

D. The surface treatment material must carry a warranty from both the Contractor and the manufacturer for a period of five (5) years when applied to pavement in appropriate condition. Acceptable performance after 5 years is defined as, no less than 70% residual inter-aggregate coverage in the treated surface area. The warranty includes coverage for peeling and delamination. Mechanical disturbances by snow plow chatter, studded tires, etc. are excluded from warranty.

PART 2 MATERIAL

2.1 HIGH DENSITY MINERAL BOND BASE EMULSIFIED ASPHALT

A. Non-ionic base emulsion used in High Density Mineral Bond, at 77 Deg. F., must meet the requirements of Table 1 below. Base emulsion is defined as the emulsion immediately after being milled and prior to anything being added.

Table 1 Non-Ionic Emulsion – Emulsifier Type: Inorganic*

Criteria ASTM/AASHTO

METHOD

Specification Unit

Initial Brookfield Viscosity at 77 °F (RV-5, 20 rpm) D2196 11,000 – 20,000 cPs pH E70 5.0 – 7.5 pH Density T59 8.5 – 9.0 lbs/gal

Solids Content T59 50.0 - 54.0 %, by weight Ash Content of emulsion T111 4.0 – 6.0 %, by weight *Inorganic is defined as a non-carbon-based emulsifier

2.2 AGGREGATE

Slate:

Table 2

Slate

Criteria ASTM Method Specification Unit

Specific gravity C128 >2.6 -- Compression C170 11,000 min psi

Refined Corundum: Table 3

Refined Corundum

Criteria ASTM Method Specification Specific Gravity C128 > 3.9 Knoop 100 Hardness C1326 > 2,000 Ball Mill Fiability ANSI B74.8 50 (14 grit)

2.3 COMPLETED HIGH DENSITY MINERAL BOND MIX DESIGN

A. Completed High Density Mineral Bond material, prior to being loaded for install must meet the requirements in Table 4 below:

Table 4 Criterion ASTM/AASHTO

Method Specification Unit

Asphalt Content D21721 17.0 – 20.0 %, by weight Solids Content D1644 55.0 – 63.0 %, by weight Initial Brookfield Viscosity at 77°F (RV-4, 20 rpm)

D2196 5,500 – 9,000 cPs

Ash Content of wet mix C2939 > 38.0 %, by weight Ash Content of Solids T1112 > 63.0 %, by weight Density T59 > 11.0 lbs/gal pH E70 6.0 – 8.0

Total Inorganic Aggregate Content T1113 > 34.0 %, by weight Total Sand Content < 6.0 %, by weight Maximum VOC D3960 < 5.0 g/l Resistance to Re-emulsification D2939 No Re-emulsification -- Wear Resistance D2486 Modified4 < 4.0 % % loss, by weight

1. Report Asphalt Content of Mixture prior to being loaded for install as % Solids minus % Ash.

2. Ash Content as a percentage of Solids Content.

3. Ash Content of completed HDMB minus Ash Content of HDMB Base Non-Ionic Emulsion. Total Inorganic

Aggregate Content defined as slate, refined corundum, and sand.

4. ASTM D2486 (Modified): Prepare samples at 48 Wet Mils on glass panel. Dry at 77 degrees F for 3 days. Immerse in water for 24 hours at 77 degrees F. Test scrub resistance with 1,000 grams brass brush for 12,000 cycles.

Report % of dry film lost.

Part 3 Execution

3.1 CONSTRUCTION EQUIPMENT

Paver: Continuous flow mixing unit.

1. Capable of applying at least 15,000 square yards of material per day.

2. Equipped with full sweep helical mixer to assure proper suspension of fine aggregates.

3.2 PREPARATION

A. General:

1. Severely raveled or porous pavements may require tack coat.

2. Asphalt concrete inlay may be required in rut deformations.

B. Surface Repair: Patch any holes, raveled areas, and low areas with asphalt concrete.

C. Cleaning:

1. Remove loose material, mud spots, sand, dust, oil, vegetation and other objectionable material.

2. Do not flush water over cracks or apply pressurized water to cracked pavement.

3. Clean the surface prior to installation.

3.3 PROTECTION

A. Implement the traffic control plan requirements. Provide safe passage for pedestrians and vehicles. Do not proceed without flaggers.

B. Protect trees, plants, and other ground cover from damage.

C. Prune trees to allow equipment passage underneath. Repair tree damage at no additional cost to the Department.

D. Install invert covers.

E. Mask off end of streets and intersection to provide straight lines:

1. Make straight lines along lip of gutters and shoulders. Keep same thickness in these areas. No runoff on these areas will be permitted.

F. Protect curb, gutter, and sidewalks from spatter, mar, or overcoat.

G. Protect surface treatment materials from traffic until it has cured.

H. Contractor shall protect existing pavement markings from damage during installation. Any pavement markings damaged, obscured, or rendered non-compliant as a result of the work shall be replaced by the Contractor at no additional cost to the City.

3.4 APPLICATION

A. Application Rate: Two separate application coats are required. The first application must be thoroughly dry and free of any damp areas before the second application begins. Machine settings must match the following application rates.

1. 0.20 gallons per square yard minimum.

2. 0.16 gallons per square yard minimum.

B. Spreading:

1. Keep constant delivery rate of material per square yard of surface.

2. Do not reduce application rate along edges or around manhole covers.

3. Apply both applications right to the edge of the pavement. Do not back away from curbs, manhole covers, and edges on either application.

3.5 AFTER APPLICATION

A. Leave no streaks caused by plugged nozzle or improper spray bar height.

B. Leave no holes, bare spots, or cracks.

C. Expose and clean Manholes, valve boxes, inlets and other service entrances and Street Fixtures.

D. Raise reflective tabs that were covered over.

E. Do not permit traffic on product until surface has cured.

3.6 FIELD QUALITY CONTROL

A. Testing: If density tests (AASHTO T59) show non-compliance, remove the product and halt operations until new material arrives and is shown to be in compliance. Measure the total amounts of material installed, and verify it meets the application rate.

B. Protect surface treatment material from traffic until it has cured.

3.7 REPAIR

A. Remove spatter and mar from curb and gutter, sidewalk, guard rails and guideposts at no additional cost to the City.

B. Remove surface treatment material from Street Fixtures.

C. Make correction lines straight. Provide good appearance.

D. Leave no streaks, holes, bare spots, or cracks through which liquids or foreign matter could penetrate to the underlying pavement.

E. Repair collateral damage caused by construction.

END OF SECTION