A04_Specifications.pdf

LAKE MEAD

NATIONAL RECREATION AREA

Boulder City, Nevada

PMIS No. 312865

River Mountain Loop Trail – Surface Repair Phase 1

CONTRACT SPECIFICATIONS

NATIONAL PARK SERVICE

PACIFIC WEST REGION

May 01, 2022

TABLE OF CONTENTS

NO. OF PAGES

DIVISION 01 - GENERAL REQUIREMENTS

01 11 00 Summary of Work

01 11 40 Work Restrictions

01 35 23 Safety Requirements

01 73 40 Execution

01 74 19 Waste Management & Disposal

01 77 00 Closeout Procedures

DIVISION 32 – EXTERIOR IMPROVEMENTS

32 01 17 Crack Seal

32 12 36 Pavement Surface Treatments – Slurry Seal

APPENDIX

RMLT Map 1

DIVISION 01

GENERAL REQUIREMENTS

LAKE – PMIS #312865 01 11 00 - 1

SUMMARY OF WORK

SECTION 01 11 00

PART 1 – GENERAL

1.1 WORK COVERED BY CONTRACT DOCUMENTS

Project Location: This project is located at River Mountain Loop Trail within NPS Boundary from

Mile Marker 11 to 19 and leg of trail from the trail head to the trail at approximately Mile Marker

12.0.

A. The Work consists of the following:

1. Contractor will submit schedule, work plan, safety plan and product proposed to be used;

all for approval by CO.

2. Conduct Pre-work site visit to coordinate work areas and logistics of traffic plan.

3. Prepare site for bike and pedestrian traffic with signage and barricades.

4. Submit for Hot Permit through NPS.

5. Prepare cracks and remove cold mix and plant material from cracks one day prior to filling with mastic. Cracks shall not be left open without caution signage. Cracks shall not be left open for more than one day.

6. Fill/repair cracks from MP 13.5 to MP 19.

7. Prepare trail surface for slurry seal application and complete required test sections for acceptance by the Contracting Officer’s Representative.

8. Slurry seal trailsurface from MP 11 to MP 19, including trail head spur which extends from the parking lot and intersects the trail at approximately MP 12.

9. Remove and dispose of all debris in an approved land fill.

10. Clean site. Stock-pile excess materials in the parking staging area for transport to Park facilities.

1.2 GOVERNMENT-FURNISHED ITEMS

A. No materials are government furnished.

1.3 PUBLIC USE OF THE SITE

A. General: The project site will be open to the public during construction. The contractor shall at all times conduct his operations to ensure the least convenience to the public. Temporary closures may be permitted upon specific written approval of the contracting officer.

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1.4 CONTRACTOR USE OF SITE

A. General: Limit use of the site during the construction period to the project area limits as outlined on the attached site map. Do not disturb portions of the site beyond the project area limits.

B. Park Entry: The contractor shall furnish a list of personnel with phone contact information.

Vehicles associated with the contractor shall be waived entrance fee upon entering in a marked company vehicle or by providing the names of employees entering in personal vehicles. The entrance fee is waived only for the purpose of reporting directly to a specific work location. Any deviation for recreational purposes is subject to payment of required entrance fees.

C. Site Access: The contractor shall access the project site as outlined on the attached site map.

Do not drive vehicles off road or access non-project areas without permission from the contracting officer or park superintendent.

D. Park Regulations: Ensure all personnel (contractors, subcontractors, and vendors) entering or working in the park are familiar with and obey all park regulations. Law enforcement rangers will intervene if they perceive any unsafe or unlawful activity.

E. Working Hours: Regular work hours shall be limited to daylight hours from 7:00 a.m. until

5:00 p.m. Monday through Friday, excluding government holidays. Overtime will be paid per Davis Bacon Wages Regulations. Work outside regular hours requires 48 hour notice and written approval from the contracting officer.

F. No Smoking Policy: Smoking is prohibited inside or outside within 25 feet of any buildings in the park. This applies to existing buildings, buildings under construction, and buildings under renovation. Discarding of tobacco products or debris anywhere other than into designated tobacco receptacles is considered littering and subject to fines.

G. Staging and Storage: Confine storage of equipment and materials to the staging / lay-down / storage areas identified at the preconstruction meeting.

H. Parking: The contractor shall park vehicles and heavy equipment in designated areas for contractor use or as established at the preconstruction meeting. Vehicles are not permitted within long-term or overnight parking along roads or in associated overlooks / pull-outs.

I. Driveways and Entrances: The contractor shall keep driveways and entrances serving the premises clear and available to the government, government employees, and emergency vehicles at all times.

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J. Preservation of Natural Features: Prevent damage to natural surroundings. Restored damaged areas and replace damaged trees, vegetation, and grass at no expense to the government.

K. Refer also to Section 01 11 40 Work Restrictions.

L. Contractor will obtain a Hot Permit for use of torch for hot plant.

1.5 REFERENCE DOCUMENTS / REPORTS

A. General: The following reference documents / reports are available upon request to supplement the information specified in the contract documents:

i. Not Applicable

END OF SECTION 01 11 00

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WORK RESTRICTIONS

SECTION 01 11 40

1.1 PARK REGULATIONS

A. General: The Contractor must comply with the following rules and conditions:

1. Ensure personnel (contractors or subcontractors) working in the park become familiar with and obey all park regulations, wear hard hats in designated areas, and do not enter any restricted areas unless required to do so and until cleared for such entry.

2. Ensure equipment is conspicuously marked for identification.

3. The Contractor shall restrict employees / representatives to the work site and control travel directly to and from the work site.

4. Restore all traffic / parking / security signs and markings, including space numbers, designations, and lines, to their original form if such signs / markings are defaced or deleted during construction / repair.

5. Control and provide security of Contractor-owned equipment and materials at the work site.

Report immediately missing / lost / stolen property to the park dispatch / law enforcement rangers at 702-293-8998 NON-EMERGENCY.

6. Vehicles associated with the Contractor shall be waived the entrance fee upon entering in a marked company vehicle or by providing the names of employees entering in personal vehicle(s). Please note that the entrance fee is waived only for the purpose of reporting directly to a specific work location. Any deviation for recreational purposes is subject to payment of required entrance fees.

a. Contractor will provide the Contracting Officer with a listing of its subcontractors and their associated vehicles and employees entering the park on a daily basis.

b. Contractor will provide the Contracting Officer with a listing of anticipated deliveries for each week.

7. Vehicles / Heavy Equipment:

a. Rules of the Road: All vehicles and heavy equipment will comply with posted traffic regulations, including speed limits and double-yellow center lane markings. Vehicles and heavy equipment shall take every safe opportunity to use paved roadside pullouts in order to allow faster moving traffic to pass. Failure to comply with traffic regulations will result in a citation being issued to the driver.

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b. Vehicle Parking: Vehicles are not permitted within long-term or overnight parking along park roads or in associated overlooks / pullouts. Vehicles and heavy equipment will be permitted at designated parking areas only.

c. Vehicle Exhaust: All vehicles will be properly maintained to insure that the exhaust produced is within legal limits. Effects of excessive vehicle exhaust may be subject to enforcement of State and Federal laws regarding emissions as well as those regarding threatened and endangered species.

d. Spills: Contractor shall be responsible for any cleanup efforts required in accordance with 40 CFR and all applicable state environmental quality laws regarding disposal and cleanup of hazardous / industrial wastes. Contractor must immediately notify the

Contracting Officer of spills.

e. Commercial Vehicle Safety Inspections: The Contractor, employees, contractors, and subcontractors shall fully cooperate regarding safety inspections of commercial vehicles within the Park. Commercial vehicle safety inspections are conducted unannounced for employee and visitor safety. Vehicles are checked for safety and mechanical deficiencies and for compliance with current state and federal laws and regulations. Driver licenses and medical certificates are also checked.

f. DOT Compliance: All vehicles are to be compliant with all DOT requirements including but not limited to driver with appropriate license class, medical examiner card as appropriate with license class, carrying three (3) triangles or three (3) flares, mounted fire extinguisher, and valid DOT safety sticker.

g. Slow Vehicles: The Contractor is to notify the Contracting Officer of slow vehicles that may cause traffic delays or extended traffic lines. Vehicles that are slow are requested to enter the Park AFTER 2:00 p.m. and exit the Park BEFORE sunset.

h. Oversized Vehicles: Oversized vehicles are defined as vehicles where the width of the vehicle or load exceeds one lane (i.e., beyond the center line of the paved road).

Oversized vehicles must not exceed the clearances along the Park road corridor.

Oversized vehicles will require an escort and drivers must avoid driving on the edges of the Park road. The Contractor is to notify the Contracting Officer of oversized vehicles, scheduled dates and estimated arrival times at the park entrance, and the identity of who is escorting the vehicle (e.g., police, contractor, etc.). Vehicles that are oversized are requested to enter the Park AFTER 2:00 p.m. and exit the Park BEFORE sunset.

i. Road Work: Contractor shall provide adequate traffic control, including flaggers on either side of any work performed on the road. Any workers on or near the road must wear highly visible, bright clothing. (See Section 01 50 00 for additional details).

j. Law Enforcement: Law enforcement rangers will intervene if they perceive any unsafe or unlawful activity. Contractor must immediately comply with any instructions issued by a park law enforcement ranger.

k. Road & Weight Restrictions: All vehicle load, weight and size limitations, as established by State law, apply to vehicles operated on the Park road (36 CFR § 4.11).

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No loads heavier than the current load rating for the historic Park bridge will be permitted.

8. Emergency Medical and Accident Reporting:

a. The Contractor or subcontractor shall contact Park Dispatch for any medical emergency or traffic accident occurring within the Park.

Emergency number: Dial 911 as needed.

Park Dispatch: 702-293-8932 EMERGENCY

Park Dispatch is called so that the entrance station will be prepared should any emergency vehicles (e.g. ambulance) need to enter the Park and so that any available

Emergency Medical Services personnel in the Park might respond until such time as the ambulance arrives.

b. The Contractor or subcontractor is required to report ANY personal injury and / or property damage incident occurring within the park. This report must be made to a

Law Enforcement Ranger at the first available opportunity before leaving the park:

Park Dispatch: 702-293-8998 NON-EMERGENCY

1.2 RESOURCE PROTECTION

A. General: The park is committed protecting natural and cultural resources found within the park and adjacent lands. The Contractor must comply with the following rules and conditions:

1. Invasive Species: The introduction of non-native invasive species can threaten rare and endangered species or can create new populations of non-native species not traditionally found in the park. The contractor is required to inform personnel, subcontractors, and vendors to thoroughly clean all vehicles, equipment, tools, supplies, and materials prior to packing / loading. The park requires, and will perform, inspections to ensure non-transport of non-native species PRIOR to arriving at the park entrance. Contact the resource staff directly at 702-371-9673 or 702-293-8849 at least (5) five days in advance of park entry to arrange for inspection(s) at the loading dock or point of origin.

2. Endangered Species: Endangered species are protected by Federal law. Obey all park regulations. Drivers must obey all traffic laws and keep an eye out for animals on or alongside road. Contact park dispatch at 702-293-8998 immediately if animal is hit or injured or will not move off of the road. All contractor personnel working in Lake Mead

National Recreation Area must have up-to-date Lake Mead desert tortoise awareness training. Prior to starting work, contact the resource staff directly at 702-371-9673 or

702-293-8849 at least (5) five business days in advance to schedule the desert tortoise awareness training.

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3. Archaeological Resources: Archaeological resources are physical evidences of past human activity, including evidences of the effects of that activity on the environment.

Archaeological resources are found above and below ground and underwater. The contractor shall appoint an archaeological monitor during all ground-disturbing activities in archaeological sensitive areas. If the monitor discovers resources, the contractor shall stop work or relocate work to a non-sensitive area and contact the contracting officer immediately. Archaeological resources typically found in the park or at the project site will be discussed further at the preconstruction meeting.

4. Soundscape / Noise: The contractor shall minimize noise levels at the project site to protect the soundscape of the park. Perform noise-producing work in less sensitive hours of the day or week or as directed by the contracting officer.

END OF SECTION 01 11 40

LAKE – PMIS 312865 01 35 23 - 1

SAFETY REQUIREMENTS

SECTION 01 35 23

PART 1 - GENERAL

1.1 SUMMARY

A. General: This section includes establishing an effective accident prevention program and providing a safe environment for all personnel and visitors.

1.2 SUBMITTALS

A. Accident Prevention Plan: After contract award and before the Pre-Construction conference, submit for review an Accident Prevention Plan. The Contracting Officer will review the proposed Plan. If the plan requires any revisions or corrections, the Contractor shall resubmit the Plan within ten (10) days. No progress payments will be made until the Plan is accepted.

1.3 QUALITY ASSURANCE

A. Comply with contract clauses entitled "Accident Prevention" and "Permits and

Responsibilities". In case of conflicts between Federal, State, and local safety and health requirements, the most stringent shall apply. Equipment or tools not meeting OSHA requirements will not be allowed on the project sites. Failure to comply with the requirements of this section and related sections may result in suspension of work.

B. Qualifications of Employees:

1. All employees must be physically qualified and able to perform their assigned duties in a safe manner.

2. Do not allow employees to perform work whose ability or alertness is impaired because of prescription or illegal drug use, fatigue, illness, intoxication, or other conditions that may expose themselves or others to injury.

3. Operators of vehicles, hoisting equipment, and hazardous plant equipment shall be able to understand signs, signals, and operating instructions, and be fully capable of operating such equipment. Provide operating instructions for all equipment. Newly hired operators shall be individually tested by an experienced operator or supervisor to determine if they are capable of safely operating equipment.

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1.4 ACCIDENT REPORTING

A. Reportable Accidents: A project reportable accident is defined as death, occupational disease, traumatic injury to employees or the public, fires, and property damage by accident in excess of one hundred dollars ($100). Notify Contracting Officer immediately in the event of a reportable accident. Within seven (7) days of a reportable accident, fill out and forward to Contracting Officer an Accident/Property Damage Report (Form CM-22). Form may be obtained from the Contracting Officer.

PART 2 - PRODUCTS

2.1 ACCIDENT PREVENTION PLAN

A. The Plan shall be written to comply with OSHA and project requirements (a generic plan is not acceptable) including but not limited to the following:

1. Name of responsible supervisor to carry out the program.

2. Weekly and monthly safety meetings.

3. First aid procedures.

4. Outline of each phase of the work, the hazards associated with each major phase, and the methods proposed to provide for property protection and safety of the public, National

Park Service personnel, and Contractor's employees. Identify the work included under each phase.

5. Training, both initial and continuing.

6. Planning for possible emergency situations, such as floods, fires, cave-ins, slides, explosions, power outages, and wind storms. Such planning shall take into consideration the nature of construction, site conditions, and degree of exposure of persons and property.

2.2 FIRST AID FACILITIES

A. Provide adequate facilities for the number of employees and the hazards associated with the types of ongoing construction work at the site.

2.3 PERSONNEL PROTECTIVE EQUIPMENT

A. Meet requirements of applicable ANSI standards.

PART 3 - EXECUTION

3.1 EMERGENCY INSTRUCTIONS

A. Post telephone numbers and reporting instructions for ambulance, physician, hospital, fire department, and police in conspicuous locations at the work site.

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3.2 FIRE AND LIFE SAFETY

A. Comply with the requirements of NFPA 241 (Standard for Safeguarding Construction, Alteration, and Demolition Operations).

B. Contractor will obtain a hot permit from NPS for operating a hot plant and torch.

C. Store hazardous materials in accordance with manufacturer’s and OSHA recommendations.

Maintain readily available, on site, MSDS for each chemical.

1. Immediately report all spills of hazardous materials to the park.

2. Maintain a spill emergency response kit.

3.3 PROTECTIVE EQUIPMENT

A. Inspect personal protective equipment daily and maintain in a serviceable condition. Clean, sanitize, and repair personal items, as appropriate, before issuing them to another individual.

B. Inspect and maintain other protective equipment and devices before use and on a periodic basis to ensure safe operation.

3.4 SAFETY MEETINGS

A. As a minimum, conduct weekly fifteen (15) minute "toolbox" safety meetings. These meetings shall be conducted by a foreman or supervisor and attended by all construction personnel at the worksite. Topics need to coincide with work scheduled for the following week. Document and submit meeting minutes to the Contracting Officer within one (1) day after the meeting.

B. Conduct monthly safety meetings for all levels of supervision. Meetings shall be attended by all contractors and subcontractors performing work on the site. Notify the Contracting

Officer of meeting dates and times. These meetings shall be used to review the effectiveness of the Contractor's safety effort, to resolve current health and safety problems, to provide a forum for planning safe construction activities, and for updating the Accident Prevention

Plan. The Contracting Officers Representative will attend the meeting and enter the results of the meetings into the daily log.

3.5 HARD HATS AND PROTECTIVE EQUIPMENT AREAS

A. A hard hat area shall be designated by the Contractor. The hard hat area shall be posted by the Contractor in a manner satisfactory to the Contracting Officer.

B. It is the Contractor's responsibility to require all those working on or visiting the site to wear hard hats and other necessary personal protective equipment at all times. As a minimum, provide six (6) six hard hats for use by visitors.

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3.6 TRAINING

A. First Aid: Provide adequate training to an adequate number of personnel to ensure prompt and efficient first aid.

B. Hazardous Material: Train and instruct each employee exposed to hazardous material in safe and approved methods of handling and storage. Hazardous materials are defined as explosive, flammable, poisonous, corrosive, oxidizing, irritating, or otherwise harmful substances that could cause death or injury.

END OF SECTION 01 35 23

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EXECUTION

SECTION 01 73 40

PART 1 - EXECUTION

1.1 EXAMINATION

A. Existing Conditions: The existence and location of site improvements, utilities, and other construction indicated as existing are not guaranteed.

1. Before beginning work, investigate and verify the existence and location of systems, utilities, and other construction affecting the Work.

2. Verify compatibility with and suitability of substrates, including compatibility with existing finishes or primers.

1.2 PREPARATION

A. Field Measurements: Take field measurements as required to fit the Work properly. Recheck measurements before installing each product. Where portions of the Work are indicated to fit to other construction, verify dimensions of other construction by field measurements before fabrication. Coordinate fabrication schedule with construction progress to avoid delaying the

Work.

B. Space Requirements: Verify space requirements and dimensions of items shown diagrammatically on Drawings.

C. Review of Contract Documents and Field Conditions: Immediately on discovery of the need for clarification of the Contract Documents caused by differing field conditions outside the control of the Contractor, submit a request for information to the Contracting Officer in accordance with Division 01 Specification 01 31 00 “Project Management and Coordination”.

1.3 INSTALLATION

A. General: Locate the Work and components of the Work accurately, in correct alignment and elevation, as indicated.

1. Make vertical work plumb and make horizontal work level.

2. Where space is limited, install components to maximize space available for maintenance and ease of removal for replacement.

3. Conceal pipes, ducts, and wiring in finished areas, unless otherwise indicated.

B. Comply with manufacturer's written instructions and recommendations for installing products in applications indicated.

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C. Install products at the time and under conditions that will ensure the best possible results.

Maintain conditions required for product performance until Substantial Completion.

D. Conduct construction operations so no part of the Work is subjected to damaging operations or loading in excess of that expected during normal conditions of occupancy.

E. Tools and Equipment: Do not use tools or equipment that produce harmful noise levels.

F. Anchors and Fasteners: Provide anchors and fasteners as required to anchor each component securely in place, accurately located and aligned with other portions of the Work.

G. Joints: Make joints of uniform width. Where joint locations in exposed work are not indicated, arrange joints for the best visual effect. Fit exposed connections together to form hairline joints.

H. Hazardous Materials: Use products, cleaners, and installation materials that are not considered hazardous.

1.4 PROGRESS CLEANING

A. General: Clean Project site and work areas daily, including common areas. Coordinate progress cleaning for joint-use areas where more than one installer has worked. Enforce requirements strictly. Dispose of materials lawfully.

B. Site: Maintain Project site free of waste materials and debris.

C. Work Areas: Clean areas where work is in progress to the level of cleanliness necessary for proper execution of the Work.

1. Remove liquid spills promptly.

2. Where dust would impair proper execution of the Work, broom-clean or vacuum the entire work area, as appropriate.

3. Contractor shall provide progress cleaning that minimizes sources of food, water, and harborage available to pests.

D. Concealed Spaces: Remove debris from concealed spaces before enclosing the space.

E. Waste Disposal: Burying or burning waste materials on-site will not be permitted. Washing waste materials down sewers or into waterways will not be permitted.

F. Limiting Exposures: Supervise construction operations to assure that no part of the construction completed or in progress, is subject to harmful, dangerous, damaging, or otherwise deleterious exposure during the construction period.

G. Final Cleaning: At completion of Work, remove all remaining waste materials, rubbish, tools, equipment, machinery and surplus materials, and clean all exposed surfaces; leave Project clean and ready for occupancy.

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1.5 CORRECTION OF THE WORK

A. Repair or remove and replace defective construction. Restore damaged substrates and finishes.

1. Repairing includes replacing defective parts, refinishing damaged surfaces, touching up with matching materials, and properly adjusting operating equipment.

B. Restore permanent facilities used during construction to their specified condition.

C. Remove and replace damaged surfaces that are exposed to view if surfaces cannot be repaired without visible evidence of repair.

D. Repair components that do not operate properly. Remove and replace operating components that cannot be repaired.

E. Remove and replace chipped, scratched, and broken glass or reflective surfaces.

END OF SECTION 01 73 40

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CONSTRUCTION WASTE MANAGEMENT

& DISPOSAL

SECTION 01 74 19

CONSTRUCTION WASTE MANAGEMENT & DISPOSAL

1.1 DISPOSAL OF WASTE

A. General: Except for items or materials to be salvaged, recycled, or otherwise reused, remove waste materials from Project site and legally dispose of them in a landfill or incinerator acceptable to authorities having jurisdiction.

1. Except as otherwise specified, do not allow waste materials that are to be disposed of to accumulate on-site.

2. Remove and transport debris in a manner that will prevent spillage on adjacent surfaces and areas.

B. Burning: Do not burn waste materials.

C. Disposal: Transport waste materials off Government’s property and legally dispose of them.

END OF SECTION 01 74 19

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CLOSEOUT PROCEDURES

SECTION 01 77 00

CLOSEOUT PROCEDURES

1.1 CLOSEOUT SUBMITTALS

A. Submit the following before requesting final inspection:

1. N/A

1.2 SUBSTANTIAL COMPLETION AND FINAL INSPECTION

A. When project, or designated portion of project, is substantially complete, request in writing a final inspection. Upon receipt of written request that project is substantially complete, the

Contracting Officer will proceed with inspection within ten (10) days of receipt of request or will advise the Contractor of items that prevent the project from being designated as substantially complete.

B. If, following final inspection, the work is determined to be substantially complete, Contracting Officer will prepare a Punch List to be corrected before final acceptance and issue a Letter of Substantial Completion. Contractor shall complete the work described on the Punch List within thirty (30) calendar days, as weather permits. If the Contractor fails to complete the work within this time frame, the Contracting Officer may either replace or correct the work with an appropriate reduction in the contract price or charge for re-inspection costs in accordance with the Inspection of Construction clause of the contract.

C. If, following final inspection, the work is not determined to be substantially complete;

Contracting Officer will notify Contractor in writing. After completing work, Contractor shall request a new final inspection. All re-inspection costs may be charged against the Contractor in accordance with the Inspection of Construction clause of the contract.

1.3 FINAL ACCEPTANCE OF THE WORK

A. After all deficiencies have been corrected, a Letter of Final Acceptance will be issued.

END OF SECTION 01 77 00

DIVISION 32

EXTERIOR IMPROVEMENTS

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Crack Seal

SECTION 32 01 17

WIDE CRACK AGGREGATE POLYMER MODIFIED CRACK SEAL

RELATED DOCUMENTS

Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

1. PRODUCT: Hot-applied, aggregate-filled, polymer-modified asphalt pavement repair mastic, used for repairing distresses in asphalt pavement specifically for wide crack applications.

2. PROPERTIES:

i. POLYMER MODIFIED BINDER Requirement

1. Cone Penetration, 77°F (25°C) (ASTM D5329) 60 max

2. Cone Penetration,122°F (50°C) (ASTM D5329) 120 max

3. Softening Point, (ASTM D36) 200°F (93°C) min

4. Flexibility, 1′′ (25.4 mm), 180°, 10 sec) (ASTM D3111 modified) Pass at 32°F (0°C)

ii. AGGREGATE

1. Abrasion Resistance (ASTM C131) 35% max

iii. BLENDED PRODUCT

1. Flexibility, 32°F (0°C) (ASTM D5329) Pass

2. Adhesion, 77°F (25°C) (ASTM D5329) 25 PSI (172 KPA) min

3. Specific Gravity 1.7 -2.0

4. Minimum Application Temperature 375°F (190°C)

5. Maximum Application Temperature 400°F (204°C)

iv. TEST ASTM D8260 Type 1 Spec Limits

1. Mastic Resilience(ASTM (8260) 50%minimum

2. Effects of Rapid Deformation (ASTM D2794) (-7°C)

3 passing specimens no chipping, cracking or separation8 N-m

3. Crack Bridging (ASTM C1305 modified) (-7°C) Pass 3 cycles

4. Mastic Stability (ASTM D8260)(70°C) 40.0 mm maximum

3. Example of Approved product:

i. Crafco Mastic One

B. INSTALLATION:

1. The density of crack sealant shall be 116 pcf (+/- 3%) and the weight per gallon shall be

15.5 lbs./gal (1.86 kg/l) at 60°F (15.5°C).

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Crack Seal

2. Prior to use, the user must read and follow Installation Instructions for sealant to verify proper product selection, heating methods, pavement preparation procedures, application geometry, usage precautions and safety procedures.

3. Prepare cracks by removing plant materials, loose gravels and cold mix.

END OF SECTION 32 01 17

LAKE – PMIS #312865 32 12 36 - 1

PAVEMENT SURFACE TREATMENTS - SLURRY SEAL

SECTION 32 12 36

PAVEMENT SURFACE TREATMENTS - SLURRY SEAL

DESCRIPTION

01.01 GENERAL

A. This work shall consist of the application of a mixture of mineral aggregate, emulsified asphalt, water, and additives on a previously compacted and bonded bituminous surface, in accordance with these specifications and drawing exhibits provided in the solicitation.

MATERIALS

02.01 ASPHALT EMULSION

A. The asphalt emulsion shall be LMCQS-1h.

B. Each shipment of emulsified asphalt shall be accompanied with a certificate of analysis/compliance from the manufacturer.

C. When the daily high ambient temperature is below 80 degrees F, the Contractor shall chemically modify the emulsion to accelerate the break and set times.

D. The emulsion modifier shall be adjusted at the emulsion manufacturer’s facility.

E. The asphalt emulsion shall comply with the Regional Transportation Commission of Southern Nevada (RTC) Uniform Standard Specification Section 703, "Bituminous Materials."

02.02 POLYMER MODIFIERS

A. The polymer modifier shall be either a solid synthetic rubber or latex material.

B. The polymer modifier shall be combined with the emulsion by co-milling with the manufacture of the asphalt emulsion at a minimum rate of 3 percent polymer solids by weight of the base asphalt in the emulsion prior to loading at the emulsion plant.

C. If the contract includes quantities for conventional slurry seal, the polymer modified emulsion shall be compatible with the mix design developed for the conventional slurry seal.

02.03 COMMERCIAL MINERAL FILLER

A. The mineral filler shall be considered a part of the mineral aggregate and shall comply with Regional Transportation Commission of Southern Nevada (RTC) Uniform Standard Specification Section 705, “Aggregates for Bituminous Courses.”

B. The quantity of filler shall be determined by the job mix design. Filler shall be used for one or more of the following reasons only:

1. To improve the gradation of the aggregate.

2. To provide improved stability and workability of the slurry.

3. To increase the durability of the cured slurry.

02.04 SET CONTROL ADDITIVE

A. The set control additive shall be aluminum sulfate, or Portland Type I/II cement, or other approved additive previously included in the mix design.

B. The quantity of set control additive shall be field adjusted to provide the specified mix properties.

http://rtcws.rtcsnv.com/mpo/streets/files/specifications/text/703.doc http://rtcws.rtcsnv.com/mpo/streets/files/specifications/text/705.doc

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02.05 WATER

A. Water for the slurry mixture shall conform to Regional Transportation Commission of Southern

Nevada (RTC) Uniform Standard Specification Section 722, "Water," and be clear, potable, free from harmful soluble salts, and compatible with the slurry mixture.

02.06 MINERAL AGGREGATE

A. The mineral aggregate shall conform to the specified contract gradations for ISSA Type I.

B. Mineral aggregate shall be 100 percent manufactured crushed stone that is free from dirt, organic matter, clay balls, adherent films of clay, dust, or other objectionable matter.

C. The parent rock used in the manufacturing shall have a normal size greater than 1/2 inch and shall comply with Regional Transportation Commission of Southern Nevada (RTC) Uniform Standard

Specification Section 705, “Aggregates for Bituminous Courses.”

D. Aggregate sources may be required to be evaluated for use based upon petrographic examination in accordance with ASTM C295. Such tests shall be at no additional cost to the Government.

CONSTRUCTION

03.01 SLURRY SEAL MIXTURES

A. Slurry Seal Mixtures:

1. The slurry seal shall consist of a mixture of emulsified asphalt; mineral aggregate; mineral filler and carbon black, if required; set control additive; and water.

2. The mixture shall conform to ISSA Type I gradations.

3. The mix shall be in accordance with this section and in accordance with Regional

Transportation Commission of Southern Nevada (RTC) Uniform Standard Specification

Section 703, ”Bituminous Materials,” Section 705, ”Aggregates for Bituminous Courses,” and Section 722, “Water.”

4. The mixture shall be proportioned, mixed, and spread evenly on a prepared surface in accordance with these specifications.

5. The completed slurry seal shall leave a homogeneous mat, adhere firmly to the prepared surface, and have a friction-resistant surface texture throughout its service life.

B. Prior to the start of work, the Contractor shall place 2 test sections of at least 1,500 square yards each, for each mix to be used, in an area designated by the COR.

1. The test section shall be placed using the same equipment, methods, and mixes as scheduled for use on the Contract.

2. At these test sections, the Contractor shall also satisfactorily demonstrate the equipment and procedure intended for the removal of oil deposits from the pavement surface.

3. The test sections will be evaluated for a minimum of 3 days after placement under traffic and normal usage.

4. If a test section proves to be unsatisfactory, the necessary adjustments to the mix design, equipment, and placement methods shall be made.

5. Additional test sections, as required, shall be constructed and evaluated for conformance to the specifications.

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C. When the test sections do not conform to the specification requirements, the slurry seal shall be removed at no additional cost to the Government.

1. No compensation will be made for reapplication or additional test sections required due to unsatisfactory work or material.

2. Initiation of work on the trail shall not begin without the COR’s approval of test sections.

D. The equipment, tools, and machines needed in the performance of the work shall be provided by the Contractor, shall be subject to the approval of the COR, and shall be maintained in a satisfactory working condition at all times.

E. Job Mix Design:

1. No slurry mixture shall be placed until mix design(s) submitted by the Contractor have been approved by the COR.

2. Sources of all materials shall be selected prior to the time when the mix design is prepared and the materials are required to be used in the work.

3. The exact proportions used in the preparation of the slurry seal shall be determined by a testing laboratory, experienced in slurry seal mix design procedures, and approved by the

COR.

4. Mix design preparation shall conform to Regional Transportation Commission of Southern

Nevada (RTC) Uniform Standard Specification Section 703, “Bituminous Materials,” and shall be at no additional cost to the Government.

5. The approved mixture shall be homogenous and sufficiently stable during the entire mixing and spreading period so that:

a. The emulsion does not break prematurely.

b. There is no segregation of the fines from the coarser aggregate.

c. The liquid portion of the mix does not float to the surface.

6. The amount and type of asphalt emulsion to be blended with aggregate shall be determined by the laboratory mix design.

7. The set control additive shall be introduced into the slurry mix by an approved method that will ensure uniform distribution and proper control. The exact amount shall be determined by conditions in the field and indicated in the mix design.

8. A minimum amount of water shall be used as necessary to obtain a workable and homogeneous mixture.

9. The slurry mixture shall show no signs of uncoated aggregate or premature breaking of emulsion when applied to the pavement surface.

F. Sampling and Testing:

1. Suitably sized samples of aggregate, bituminous material, and mineral filler shall be submitted, when required by the COR, for approval not less than 10 days before the work starts. All samples of materials shall be supplied by the Contractor at no additional cost to the Government.

2. All tests deemed necessary by the Government to determine conformance with requirements specified shall be performed without cost to the Contractor.

3. Additional samples of materials shall be furnished as directed by the COR during progress of the work.

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4. The aggregate manufacturer shall produce and stockpile each specified gradation of aggregate in 500-ton lots. The first lot of material shall be sampled and tested by the COR.

5. Certification of Lot 1 shall be based upon the averaged test values from 5 samples.

a. The approved gradation of Lot 1 shall be the “job target gradation.”

b. The stockpile tolerance identified in Regional Transportation Commission of Southern

Nevada (RTC) Uniform Standard Specification Section 705, “Aggregates for

Bituminous Courses,” shall be applied to this gradation.

6. Each successive lot of 500 tons shall be sampled and tested once.

a. When the “job target gradation” has been tested and accepted, the Contractor shall continuously manufacture the aggregate until the total estimated quantity is produced, tested, and accepted.

b. The Contractor shall not receive compensation for unused aggregate.

c. The approved lots of aggregate shall be stockpiled in a secured area, protected from contamination, and reserved for use on this contract.

7. If it is established that a satisfactory mixture meeting the requirements specified herein cannot be produced from the materials furnished, the materials shall be rejected and the

Contractor shall submit new samples.

03.02 PREPARATION OF SURFACE

A. Immediately prior to applying the slurry seal, the existing pavement surface shall be cleaned of all silt deposits, oil spots, vegetation, and all loose or objectionable material.

B. If the pavement cracks have not been previously sealed, the loose material in cracks shall be removed as follows:

1. Compressed Air: 90 psi at the nozzle immediately before sweeping or vacuuming operations.

2. Pressurized Water: Not greater than 1,000 psi at the nozzle prior to sweeping or vacuuming operations. The cracks may be damp but shall not have freestanding water in the crack.

3. All surface debris from the crack cleaning process shall be thoroughly cleaned prior to placement of slurry seal.

4. Power brooms may be used for sweeping.

5. Water flushing will be permitted by approval of the COR when normal sweeping will not adequately remove debris from the surface. If water flushing is approved, the pavement shall be dry before the slurry seal is applied.

C. Areas impregnated with grease, oil, or fuel shall be cleaned by grinding.

1. Traffic paint not tightly bonded to the surface and any thermoplastic markings shall also be removed.

2. The grinding machine used to remove the existing bituminous surface, paint, and pavement markings shall meet the following requirements:

a. Be a hydrostatically powered mandrel type device.

b. The mandrel shall be studded with a minimum of 72 cutter bits to provide a pavement texture acceptable to the COR.

c. Bits shall have tungsten carbide tips in forged steel holders and be conical in shape.

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d. The mandrel device shall have a minimum cutting width of 24 inches and a variable cutting depth of zero to 4 inches.

3. Areas inaccessible to the grinder shall be treated and prepared with an alternate method approved by the COR.

4. The debris produced by the grinding machine or other method shall be immediately removed from the pavement surface and disposed of at an acceptable location.

5. The Contractor shall protect existing facilities (i.e., concrete, valve boxes, manholes, and so forth).

6. Damaged facilities shall be replaced at the direction of the COR and at no additional cost to the Government.

D. The COR shall give final approval that the surface has been properly prepared prior to the application of the slurry. This approval shall not relieve the Contractor from responsibility as outlined above.

E. Prior to application of the slurry, manholes, valve boxes, drop inlets, and other service entrances shall be protected by covering with paper, plastic, or other suitable material approved by the COR.

The paper shall be held in place with spray glue or tape and removed within 24 hours after slurry seal has cured.

03.03 MIXING UNIT

A. The slurry seal shall be mixed and applied with a machine designed and manufactured to lay the mixture.

B. Self-loading mixing units shall not be used on roadway right-of-way widths of 60 feet or less.

C. The mixing machine shall meet the following requirements:

1. A continuous flow mixing unit, automatically sequenced.

2. Capable of delivering accurately predetermined proportions of aggregate, water, and asphalt emulsion to a revolving multi-blade, double-shafted, spiraled mixer tank.

3. Capable of discharging the thoroughly mixed product on a continuous basis.

4. Equipped with a hydraulically controlled steel pugmill gate for positive discharge operations. Discharge from the pugmill shall be controlled by a chute or other suitable mechanical device.

5. Equipped with a metering system to accurately meter all liquids by volume by the use of flow meters reading gallons per minute. The flow of the liquids shall be consistent and precise and feed into the pugmill in the proportions outlined in the mix design.

6. Equipped with a temperature-indicating device installed in the emulsion tank at the emulsion pump suction line level.

7. Capable of thoroughly blending all ingredients together without violent action.

8. Equipped with an approved fines feeder that provides an accurate metering device or method of introducing a predetermined proportion of mineral filler into the mixer as the aggregate is fed in. The fines feeder shall be used when mineral filler is part of the aggregate blend.

9. Equipped with a water pressure system and fog type spray bar.

10. Capable of mixing materials at preset proportions regardless of the speed of machine and without changing machine settings.

D. Each mixing unit to be used in performance of the work shall be calibrated prior to construction.

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1. Previous calibration documentation covering the exact materials to be used may be accepted provided they were made during the current calendar year.

2. The documentation shall include an individual calibration for each type of material to be used on the project.

E. The Contractor shall ensure that all equipment used to transport materials and mixing units on public roadways comply with Nevada Revised Statutes Sections 484.764 through 484.771. If special use permits are required, the Contractor shall provide the COR with copies.

F. Slurry Seal Spreader Box:

1. The slurry seal shall be spread with a box specifically designed to place slurry seal.

2. The mixture shall be spread uniformly by means of a conventional slurry seal surfacing spreader box attached to the mixer.

3. Front, rear, and side seals shall be provided to ensure no loss of the mixture at the pavement contact point. The rear seal shall be provided to act as a final strike-off and shall be adjustable.

4. The spreader box and rear strike-off shall be so designed and operated that a uniform consistency is achieved to produce a free flow of material to the rear strike-off.

5. Augers within the box may be required due the consistency of the material and the pavement slope. The spreader box shall have suitable means provided to side shift the box to compensate for variations in the pavement geometry.

6. A burlap drag or other approved material shall be attached to the rear of the spreader box to provide a uniform, highly textured mat. If used, the burlap drag shall be clean, flexible, and not leave drag or scour marks in the finished slurry seal surface.

7. The spreader box shall be kept clean and buildup of asphalt and aggregate on the box shall not be permitted.

03.04 MIX PREPARATION

A. The Contractor shall ensure that all oversized aggregate particles and other objectionable matter is removed from the mineral aggregate utilized in the slurry mix.

B. At the direction of the COR, the aggregate shall be screened prior to loading into the mixing unit.

1. Type I and II gradations shall be screened through a 3/8-inch screen.

2. Type III gradation shall be screened through a 1/2-inch screen.

3. With the approval of the COR, temporary use of screens attached to the distributor box will be permitted.

C. The aggregate shall be moistened immediately prior to mixing with the emulsion.

03.05 WATER FOG

A. Immediately prior to application of the slurry seal, the surface of the pavement and all crack faces shall be moistened with a fog spray of water, applied at the rate of 0.02 to 0.05 gallon per square yard from the spray bar on the slurry seal machine.

B. No free water shall be on the surface of the pavement following the fog spray.

C. Rate of application of the fog spray shall be adjusted during the day to suit pavement temperatures, surface texture, humidity, and dryness of pavement surface.

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03.06 APPLICATION

A. Sufficient quantities of the slurry seal mixture shall be fed into the spreader box so that uniform and complete coverage of the pavement is obtained.

B. The mixing machine shall be operated at such a speed that the mixture in the spreader box shall not exceed a total mixing time of 4 minutes and the volume shall remain essentially constant.

C. The slurry seal shall be placed in accordance with the following:

Aggregate Application Rate

(pounds per square yard)

Type I 8-12

Type II 12-20

Type III 18-30

D. The application rate shall be adjusted for the surface texture of the pavement to ensure effective embedment of the aggregate and the durability of the surface treatment.

E. The Contractor shall submit the following signed, written reports to the COR each working day:

1. A report indicating the amount of aggregate and emulsion delivered, aggregate and emulsion used on the project, and the amount of area in square yards completed.

2. A report indicating the percentage of emulsion used to aggregate used and the application rate in pounds of aggregate applied per square yard of area covered. This report will verify compliance with the mixture of materials to the mix design and the specified aggregate application rate.

F. The Contractor shall submit to the COR from the aggregate and emulsion suppliers an original copy of the bill of lading daily for each delivery of material to be used on the project. The

Contractor shall submit with each emulsion bill of lading a certificate of compliance from the emulsion supplier verifying that each delivery of emulsion is in compliance with the contract requirements.

G. If uniform thickness cannot be met with one application due to irregularities in pavement surface, multiple applications shall be made.

1. Where multiple applications are required, each application shall be thoroughly cured before another application is placed.

H. No streaks caused by oversized aggregate particles or buildup of slurry mix on squeegees shall be left in the finished surface.

03.07 JOINTS

A. The longitudinal joint between adjacent lanes shall have no visible lap, pinholes, or uncovered areas.

B. Thick spots caused by overlapping shall be smoothed immediately with hand squeegees before the emulsion breaks.

C. Overlaps that occur at transverse joints shall also be smoothed before the emulsion breaks, to obtain a uniform surface with no discontinuities.

03.08 PRODUCTION

A. The Contractor shall average a minimum of 20,000 square yards of material, in place, per working day for work within the public right-of-way.

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03.09 LINES

A. Care shall be taken to ensure straight lines along curbs and shoulders.

B. No runoff on these areas will be permitted.

C. Lines at intersections shall be kept straight to provide a good…