ASHE 18-1098 IDIQ Paving Specs R2_ Jun 20.pdf

Prepared and Submitted by:

Architecture, Engineering and Consulting Services

SO.IN.CI. S.r.l.

Via di Sacco Pastore n. 4 - Rome, Italy

Tel. +39.06.97848041 fax +39.06.97848175 E-mail: design@soinci.it

31st FIGHTER WING 31st CIVIL ENGINEERING SQUADRON

31st CES/CENM PROJECT MANAGEMENT ELEMENT

PROJECT ASHE 18-1098

I.D.I.Q.

PAVING CONTRACT

AVIANO AIR BASE - ITALY

TECHNICAL SPECIFICATIONS

REV.2

FINAL SUBMITTAL (100%) REV.2

Revision 02: Jun 2020

SECTION C – TECHNICAL SPECIFICATION FOR PAVINGS 1

U.S. AIR FORCE

31ST FIGHTER WING

31ST CES/CENM

AVIANO AIR BASE, ITALY

SECTION C

TECHNICAL SPECIFICATIONS

FOR PAVINGS

REV.2

SECTION C – TECHNICAL SPECIFICATION FOR PAVINGS 2

TABLE OF CONTENTS

SECTION C-1 GENERAL

1.1 WORK SITE CONDITIONS

1.1.1 Work Site Availability

1.1.2 Work Site Access

1.1.3 Transportation of Personnel and Materials

1.1.4 Protection of Persons and Property

1.1.5 Availability of Utilities

1.1.6 Traffic Control and Protection

1.1.7 Airfield Safety and Restricted Areas Training

1.1.8 Hazmat Housekeeping

1.1.9 Project sign

1.1.10 Toilet Facilities

1.2 CONTRACTOR QUALIFICATIONS

1.2.1 SOA Certifications

1.2.2 Safety and Health

1.2.2.1 Antenna systems and Safety

1.2.3 Workmanship

1.2.4 Quality Control

1.2.5 Warranty

1.3 STORAGE

1.4 APPROVAL OF MATERIALS

1.5 WASTE MANAGEMENT

1.6 CLEANING:

SECTION C-2 ASPHALT PAVEMENTS

2.1 REFERENCES

2.2 DEFINITIONS

2.2.1 Bituminous Concrete Wearing Course

2.2.2 Bituminous Tack Coat

2.2.3 Bituminous concrete binder course

2.2.4 Aggregate Base Course

2.2.5 Subgrade:

2.3 EXECUTION

2.3.1 Preconstruction Conference and site visit

2.3.2 Weather Limitations

2.3.2.1 Wearing Course

2.3.2.2 Tack Coat

2.3.3 Removal of Existing Pavements

2.3.3.1 Pavement sawcut

2.3.3.1.1 Pavement sawcut, 20cm deep

2.3.3.1.2 Pavement sawcut, 10cm deep

2.3.3.2 Removal of Bituminous Wearing Course, Binder Course and Base Course, up to 25cm

2.3.3.3 Removal of Concrete Stabilized Subbase, up to 20cm

2.3.3.4 Removal of Compacted Subbase, up to 40cm

2.3.4 Milling of Asphalt Pavements

2.3.4.1 Milling of existing wearing course, 2cm deep

2.3.4.2 Milling of existing wearing course, 5cm deep

SECTION C – TECHNICAL SPECIFICATION FOR PAVINGS 3

2.3.4.3 Milling of existing wearing course, 7cm deep

2.3.5 Excavation:

2.3.5.1 Open section excavation

2.3.5.2 Trench excavation

2.3.6 Fill, Backfill and Compaction

2.3.7 Compaction Equipment

2.4 SUBGRADE FOR NEW ASPHALT PAVEMENTS – SUBBASE AND BASE COURSE

2.4.1 Compacted subbase and Base Course – Subgrade Alternative 1, 40cm thick

2.4.2 Subgrade Alternative 2 – 45cm thick

2.4.3 Subgrade Alternative 3 - 47cm thick

2.5 BINDER COURSE, WEARING COURSE AND ASPHALT OVERLAY

2.5.1 Surface Preparation

2.5.2 Asphalt Alternative 1 - 9cm thick

2.5.3 Asphalt Alternative 2 - 10cm thick

2.5.4 Asphalt Alternative 3 - 12cm thick

2.5.5 Asphalt Alternative 4 - 12cm thick:

2.5.6 Overlay Alternative 1 - 4cm thick over existing pavement

2.5.7 Overlay Alternative 2 – 6 cm thick over existing pavement

2.6 MULTIFUNCTIONAL WEARING COURSE:

2.7 TESTING:

2.7.1 Base Course Testing:

2.7.1.1 Sieve Analysis;

2.7.1.2 Liquid Limit and Plasticity Index;

2.7.1.3 Compaction Test

2.7.1.4 Field density

2.7.1.5 Plate load bearing tests

2.7.2 Asphalt Testing:

2.7.2.1 Bitumen content analysis;

2.7.2.2 Sieve analysis on aggregates;

2.7.2.3 Marshall Test

2.7.2.4 Void and density after rolling test

2.8 CRACK REPAIR - HOT SEALING WITH MODIFIED BITUMEN:

2.8.1 Hot sealing with modified bitumen, up to 100 lm

2.8.2 Hot sealing with modified bitumen, over 100 lm

SECTION C-3 CONCRETE PAVEMENTS

3.1 REFERENCES

3.1.1 Manufacturer’s Publications/Manuals

3.2 SUBMITTALS:

3.2.1 Product Data:

3.2.2 Design Data – Mix Design:

3.2.3 Test Reports

3.2.4 Certificates:

3.3 DELIVERY, STORAGE AND HANDLING:

3.3.1 Cement

3.3.2 Aggregates

3.3.3 Admixtures

3.4 EXECUTION – PAVEMENTS

3.4.1 Reinforced Concrete Pavements for Aprons and Parking Lots:

SECTION C – TECHNICAL SPECIFICATION FOR PAVINGS 4

3.4.2 Airfield Concrete Pavements:

3.4.3 Complementary works to Airfield Concrete Pavement - Unpaved Shoulders:

3.5 JOINTS

3.5.1 Joints Execution:

3.5.2 Primers:

3.5.3 Bond Breakers:

3.5.4 Joint Seal:

3.5.4.1 Two Component Cold-Applied Sealing Compound:

3.5.4.2 Single Component Cold-Applied Silicone:

3.5.5 Preformed Joints:

3.6 PAVEMENT AND JOINTS REPAIR

3.6.1 Joint removal and refacing

3.6.2 Spall and Patch Repairs in Concrete Pavement

3.6.3 Reseal Longitudinal and Transverse Joints in Concrete Pavement

3.6.4 Rout and Seal Longitudinal and Transverse Cracks in Concrete Pavement

3.7 CONCRETE PAVEMENT DEMOLITION

3.7.1 Concrete pavement sawcut, up to 20cm deep

3.7.2 Concrete pavement demolition, 20cm thick

3.7.3 Concrete pavement demolition, 30cm thick

SECTION C-4 SIDEWALK, CONCRETE PAVER AND CURBS

4.1 REFERENCES:

4.2 SIDEWALKS:

4.2.1 Concrete Sidewalks and walkways

4.2.2 Concrete Paver Sidewalk and walkways

4.2.3 Sidewalk Drain

4.3 PAVING BLOCKS FOR GRASS/PARKING AREA (VERDE PRATICO):

4.3.1 Concrete blocks for grass/parking area

4.3.2 PVC blocks for grass/parking area

4.4 CURBS:

4.4.1 100x25x12cm prefabricated concrete curbs

4.4.2 25x12cm cast in place concrete curbs

4.4.3 Curved Curb Sections:

4.4.4 Curb End:

4.4.5 Drain inlet Curb:

4.4.6 Curb Drainage Holes:

4.4.7 Curb Removal:

4.5 SPEED BUMPER AND RAISED CROSSINGS:

4.5.1 Rubber type - Speed bumper:

4.5.2 Asphalt type - Raised pedestrian crossing:

SECTION C-5 STORM DRAINAGE AND UTILITIES PROTECTION

5.1 REFERENCES

5.2 INSTALLATION OF DRAINAGE FIELD BASIN:

5.3 INFILTRATION SWALE

5.4 INFILTRATION TRENCH WITH DRILLED PIPE

5.5 OIL WATER SEPARATOR (OWS) SYSTEM:

5.5.1 Oil-Water separator system – Draining surface 1000 sqm

5.5.2 Oil-Water separator system – Draining surface 2000 sqm

SECTION C – TECHNICAL SPECIFICATION FOR PAVINGS 5

5.5.3 Oil-Water separator system – Draining surface 5000 sqm

5.5.4 Oil-Water separator system – Draining surface 7000 sqm

5.6 PVC PIPES

5.6.1 Pvc Pipes – DN200

5.6.2 Pvc Pipes – DN250

5.6.3 Pvc Pipes – DN315

5.6.4 Pvc Pipes – DN400

5.7 DRAINAGE CONCRETE PITS:

5.7.1 Drainage Concrete Pits – 60x60cm

5.7.2 Drainage Concrete Pits – 80x80cm

5.7.3 Drainage Concrete Pits – 100x100cm

5.7.4 Prefabricated reinforced pit extension, 20cm high. – 60x60x20

5.7.5 Prefabricated reinforced pit extension, 20cm high. – 80x80x20

5.7.6 Prefabricated reinforced pit extension, 20cm high. – 100x100x20

5.8 MANHOLE COVER

5.8.1 Cast Iron Manhole Cover:

5.8.2 Concrete Manhole Cover:

5.8.3 Manhole Cover Leveling:

5.9 PROTECTION OF UTILITIES:

5.9.1 Hand excavation:

5.9.2 Concrete/PVC Encased Conduit:

5.9.2.1 15cm thick concrete over PVC pipe encasement;

5.9.2.2 20cm thick concrete over PVC pipe encasement;

5.9.3 Concrete Encasement:

5.9.3.1 15cm thick concrete encasement;

5.9.3.2 20cm thick concrete encasement;

SECTION C-6 GRASS AREAS

6.1 REFERENCES

6.2 GRASS AREAS REVITALIZATION

6.2.1 Topsoil:

6.2.1.1 Off-site top soil;

6.2.1.2 In site top soil;

6.2.2 Composition:

6.2.3 Preparation of Top Soil:

6.2.4 Grass and Fertilizer:

6.2.5 Watering:

6.2.6 Promotion of Turf Growth:

6.3 LAWN MAINTENANCE

SECTION C-7 APPLICABLE MASTER SPECIFICATIONS

SECTION 01101 PROJECT SIGN

SECTION 02220 SITE DEMOLITION

SECTION 02231 CLEARING AND GRUBBING

SECTION 02315 EXCAVATION AND FILL

SECTION 02579 PRECAST CONCRETE PAVING BLOCKS FOR SIDEWALKS

SECTION 02630 STORM DRAINAGE

SECTION 02722 GRADED CRUSHED AGGREGATE BASE COURSE FOR FLEXIBLE PAVEMENT

SECTION 02724 AGGREGATE BASE COURSE AND SAND SUBBASE COURSE

SECTION C – TECHNICAL SPECIFICATION FOR PAVINGS 6

SECTION 02741 BITUMINOUS CONCRETE PAVEMENT

SECTION 02749 HOT-MIX ASPHALT (HMA) FOR AIRFIELDS

SECTION 02751 CONCRETE PAVEMENT FOR AIRFIELDS AND OTHER HEAVY DUTY PAVEMENTS

SECTION 02762 JOINTS, REINFORCEMENT, AND MOORING EYES IN CONCRETE PAVEMENTS

SECTION 02921 TURF

SECTION 02935 LANDSCAPE MAINTENANCE

SECTION 03300 CAST-IN-PLACE CONCRETE

SECTION C-8 MATERIAL/SYSTEMS DATA SHEET (ONLY ON ELECTRONIC FORMAT)

01 Erborella 02 Geoplast 03_Raised crossing 04_Conpaviper Cnc Pavement Manual 05_Conpaviper Cnc Subgrades 06_Slump Test 07_Draining Field

ANNEX FIRE SAFETY GUIDE and CHECK LIST

SECTION C – TECHNICAL SPECIFICATION FOR PAVINGS 7

SECTION C-1 GENERAL

The contractor shall furnish all labor, materials, equipment and tools and shall perform all operations to accomplish works under this contract at Aviano AB, Aviano, Italy and other Separated Sites (G.S.U.)

within Italy.

1.1 WORK SITE CONDITIONS

1.1.1 Work Site Availability

Due to the particular uses of some areas, the contractor may be required to perform work during weekends, nights and weekend nights. Work during weekends, nights and weekend nights will be coordinated and authorized in advance by C.O. The work area is subject to restrictions and controls of a military nature. In case of exercises or other operational requirements, the contractor may be required to remove his personnel and equipment from the area without advance notice in accordance with contract clauses.

The government will not be held liable for unproductive time and other related costs due to delays for unannounced suspension of work due to military operations and/or exercises or safety reasons.

The government will only negotiate an equitable extension of the performance period based on documented delays and unannounced suspensions of work.

1.1.2 Work Site Access

Access to work sites cannot be totally blocked. Work shall be planned to guarantee at least limited access. Should it become necessary for the contractor to totally block access to an area in the performance of contract requirements, such blockage shall be coordinated with and approved by the contracting officer or his designated representative. The request for approval of the blockage must be submitted to the contracting officer a minimum of 12 calendar days prior to the desired closure date.

Prior to starting any work, the contractor shall submit a Work Plan for approval by the Contracting Officer and user, in order to avoid interferences with user activities.

1.1.3 Transportation of Personnel and Materials

It shall be the contractor's responsibility to provide for the transportation of his personnel to and from the job-site as well as load, transport, unload and/or place all supplies, materials, equipment, and refuse involved in this contract.

Contractor's personnel, vehicles and equipment must not obstruct access roads to other buildings.

Temporary parking of vehicles, for loading or unloading materials and equipment is permitted in the proximity of the work area; unless such operations will obstruct traffic flow.

1.1.4 Protection of Persons and Property

Adequate protection of persons and property shall always be provided. No material or debris shall be burned at the work site. All movable equipment and materials within the work area shall be moved or sufficiently protected by the contractor. The contractor upon completion of work in that area shall reposition materials or equipment moved during work. If required by the delivery order, the contractor shall erect a temporary construction fence, 2 meters tall, to restrict access to the work site.

1.1.5 Availability of Utilities

Water and electric utilities will be provided free of charge to the contractor. Characteristics of available electricity and point of connection for both electricity and water will be identified for each work site on each delivery order. The contractor shall provide and maintain, at their own expense, the

SECTION C – TECHNICAL SPECIFICATION FOR PAVINGS 8

necessary temporary service lines from existing outlets to his work site. In those instances where the work site is sufficiently distant from available utilities as to make connection impractical, the contractor shall be responsible for providing the required utilities at his own expense through portable means.

Use of utilities, considering the conservation of energy and water, shall be limited to the minimum necessary.

1.1.6 Traffic Control and Protection

The contractor shall place warning signs directly at the work site and at least five (5) meters ahead of the work site (in the affected traffic line) to alert approaching traffic from both directions.

Contractor or Contractor’s employees, including subcontractors, shall obey all traffic laws on installation.

The Contractor shall park all vehicles, including heavy equipment vehicles, only in unobtrusive locations within the fence line of the construction site or laydown areas, where applicable. Every effort must be made to avoid parking vehicles or heavy equipment where it can be easily observed by the public.

The Contractor shall not park outside the construction zone unless approved through BCE.

The Contractor shall clearly identify their vehicles using company logos or signs on their vehicles

1.1.7 Airfield Safety and Restricted Areas Training

To allow Contractors performing works inside the restricted areas, is mandatory for them personnel to attend the training at Bldg.1023 and receive the driving license for restricted areas and airfield. At least one member of team shall be fluent English speaking.

1.1.8 Hazmat Housekeeping

Prior to bringing any hazardous material into the base, the Contractor must contact BCE to coordinate the storage and handling of all hazardous materials. Contractor is responsible for complying with all applicable environmental regulations and laws pertaining to the storage, handling, and transportation of hazardous materials and hazardous waste.

Hazardous materials: The Contractor shall identify all hazardous materials required for completion of the project.

Safety Data Sheets: The Contractor shall furnish English language versions of the Safety Data Sheets (SDS) of hazardous materials, chemical, toxic, and noxious, that will be used in the construction work, to 31st CES/CEIE for approval and coordination through SEG and SGPB. The Contracting Officer will provide sample of the SDS form to the Contractor.

Hazardous Waste Management Plan: The Contractor shall provide a hazardous waste management plan.

Chemicals Materials: The Contractor shall ensure that hazardous materials utilized during construction do not contain any chemicals listed as EPA 17 toxins. A list of the EPA 17 toxins con be obtained from the 31st CES/CEIE office.

Liquid, flammable or toxic substances: Any liquid, flammable, or any other toxic substances that are required for the execution of the works, shall be kept in properly labeled, special containers. Relative data (quantity, characteristics and location) shall be transmitted to 31st CES/CEF or 31st CES/CEIE through the Director of Works and Fire Department approval is required, see the attached Fire Department check list.

1.1.9 Project sign

The Contractor shall furnish two project signs on site, one in accordance with Section 01101 and one in accordance with law 81/08.

The sign shown in section 01101 shall be made of a durable material and maintained in good condition.

Lettering is to be white gloss, exterior-type enamel. The sign and posts shall be given one prime coat

SECTION C – TECHNICAL SPECIFICATION FOR PAVINGS 9

and two finish coats of dark brown gloss exterior enamel paint. The sign shall be erected at the designated location and shall be maintained in good condition by the Contractor until completion of the contract. The sign shall remain the property of the Contractor and shall be removed from the site upon final inspection and acceptance of the facility. Contractor identification and logo shall be allowed only on this sign and nowhere else on the exterior of the job site, except for company vehicles. Contractors shall submit sign proposal to CE for approval.

When applicable the contractor shall provide a portable sign, A3 format, showing all contract and job information included in section 01101.

1.1.10 Toilet Facilities

Contractor's personnel may use toilet facilities available in the vicinity of the work site. Contractor personnel shall ensure facility cleanliness is preserved at all times.

1.2 CONTRACTOR QUALIFICATIONS

1.2.1 SOA Certifications

The contractor shall provide to the Contracting Office the following SOA (Società Organismi di Attestazione) certifications in accordance with contract requirements and clauses

1.2.2 Safety and Health

Contractor's activities shall be in compliance with the following: OSHA 29 CFR 1926 Construction Regulations, US Corps of Engineers Manual EM385-1-1 Nov. 2014, AFMAN 91-203 Air Force Occupational Safety, Fire, and Health Standards, and Italian Legislative Decree 81/08 including subsequent amendments: in case of any differences, the more stringent applies.

An appointed professional shall develop a site-specific safety plan (PSC - Piano di Sicurezza e Coordinamento), in accordance with Legislative Decree 81/08). PSC is considered equivalent to the Accident prevention plan required by Manual USACE EM385-1-1.

Contractor shall consider in advance interference hazard through a preliminary assessment plan: the DUVRI - Documento Unico per la Valutazione Rischi da Interferenze shall be coordinated with 31 FW/CCPP Base employees safety representative (Phone 0434 30 5709), in accordance with Legislative Decree 81/08.

Contractor shall develop a site specific plan for operational safety (POS - Piano Operativo di Sicurezza) in accordance with Legislative Decree 81/08, prior to starting planned work activities. Employees training certificates shall be included in the POS documents.

Contractor's representatives shall receive a safety briefing during the pre-performance conference from Base 31 FW/SEG Occupational Safety Office. Electronic copy of POS will be provided to 31 FS/SEG (Phone 0434 30 4817).

Contractor’s activities within confined spaces are covered by OSHA 29 CFR 19.26.1200 and OSHA 29 CFR 1910.146, respectively for Construction and General Industry. Mentioned regulations shall be coordinated with Italian presidential decree DPR 177, dated 14 SEP 2011. Mandatory prescriptions on confined space shall be taken into consideration at the design stage for new contracts as well as for maintenance and repair contracts.

SECTION C – TECHNICAL SPECIFICATION FOR PAVINGS 10

1.2.2.1 Antenna systems and Safety

The Contractor shall contact 31° CES 72 hours prior to working in the vicinity of an antennas for radiation prevention and to avoid interferences with base operations. The contractor shall not remove or disconnect cables, antenna systems without prior coordination with 31° CES.

1.2.3 Workmanship

All works shall be performed in a neat and professional manner by skilled labor from the appropriate trades. The works shall be executed strictly in accordance with the delivery order(s) and with the best standard trade practices.

1.2.4 Quality Control

Contractor shall establish and maintain an effective quality control (QC) system.

QC consist of plans, test, procedures, and organization necessary to produce a product which complies with the Contract requirements. The QC system covers all design and construction operations, both onsite and offsite, and be keyed to the proposed design and construction sequence. The contractor shall appoint a project superintendent, fluent English speaking, who will be held responsible for the quality of the work execution, as per F.A.R. 52.246-12

1.2.5 Warranty

Contractor shall provide a written guarantee with which he will guarantee all works and materials are of good quality and agrees, under reasonable conditions, that he will provide at his own expense all the necessary repairs required in case of the existence of discrepancy or defect.

1.3 STORAGE

The contractor shall store all materials and equipment only in areas approved by the contracting officer or designated representative. Space available for storage of equipment and materials by the contractor is very limited. Security of stored items remains the responsibility of the contractor.

Contractor shall display a nameplate on the exterior of all storage units with the name of the Contractor’s company, the Contractor’s point(s) of contact (POC) and telephone number where they can be reached.

1.4 APPROVAL OF MATERIALS

Before starting works contractor shall submit to Contracting Officer samples of each primary component to be used. No materiali shall be applied or used on any project unless approved by the contracting officer. All requests for substitutions must also be submitted to the contracting officer for approval. Each such request shall include specific identification of the proposed substitute, justification for the necessity of the substitution, a tabulation of the specified material compared to the proposed substitute which clearly indicate any deviations from the specified requirements. All material shall meet the standards of the Ente Nazionale Italiano di Unificazione (UNI).

The Contractor shall provide, for all the materials that will be furnished and installed, a written certification, completed with catalog data from which shall be clear the total absence of toxic-noxious materials and the relative embodied energy (aka Gray Energy) in MJ/kg.

1.5 WASTE MANAGEMENT

The contractor will be responsible for the disposal of debris from the work site. The material will be disposed of in an authorized dumping area outside the base upon completion of the work, it includes the payment of dump fees. Transportation, storage, use, and disposal of materials utilized by the contractor to perform the work shall be at the contractor's expense and the contractor shall not utilize government facilities for these purposes.

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The contractor shall provide to Base Representatives one (1) copy of the “Formulario Identificazione dei Rifiuti" (so-called FIR), in compliance with D. Lgs. n. 22/1997 and D. Lgs. n.152/2006.

Disposal of materials in violation of the applicable laws (i.e. Law D.lgs 152/2006 as subsequently amended and supplemented) will result in a material breach of the contract.

It shall be the responsibility of the Contractor to handle and dispose hazardous material in the appropriate manner, as prescribed by Italian Law, governing the handling of such materials, and to provide all required documentation and related coordination to obtain the necessary authorizations.

Removal, handling and disposal of hazardous material materials shall be in compliance with all local and national applicable regulations.

It is not allowed to wash tools into the available sinks or discharge contaminated water resulting from the working into the drainage system or on ground.

1.6 CLEANING:

At the end of each working day, the Contractor shall be responsible for cleaning the area surrounding the areas involved in the work, the Contractor shall provide that the surrounding areas are kept constantly clean and accessible, completely safe. Such functions always include disposal of accumulated waste materials and rubbish and other operations necessary to present a neat appearance.

Contractors shall ensure all light weight debris at the construction site is properly secured in waste receptacles so that it does not blow to another area or onto the airfield.

SECTION C – TECHNICAL SPECIFICATION FOR PAVINGS 12

SECTION C-2 ASPHALT PAVEMENTS

2.1 REFERENCES

CNR Bollettino Ufficiale no. 4 Standards for coarse aggregates, fine aggregate, granular material, sand and additives for roadway construction.

D.M. 6792 dated 05/11/2001 Functional and geometric guidelines for the construction of roads.

CNR –Bollettino Ufficiale n°178 Road Pavement Catalogue – 1995.

UNI EN 933 Tests for geometrical properties of aggregates

UNI EN 1097 Tests for mechanical and physical properties of aggregates

UNI EN 13108 Bituminous mixtures - Material specifications-

UNI EN 13286 Unbound and hydraulically bound mixtures

For what follow in this section of the document refer also to sections of the Master Technical Specifications for Construction Projects at Aviano AB, Italy, as updated and attached to this Technical Specification:

01101 Project Sign 02220 Site Demolition 02231 Clearing and Grubbing 02315 Excavation and Fill 02722 Graded Crushed Aggregate Base Course for Flexible Pavement 02724 Aggregate Base Course and Sand Subbase Course 02741 Bituminous Concrete Pavement

2.2 DEFINITIONS

2.2.1 Bituminous Concrete Wearing Course

Bituminous concrete layer to finish road pavement as top traffic bearing layer of the pavement.

2.2.2 Bituminous Tack Coat

Low viscosity liquid asphaltic materials applied to new bituminous concrete binder course or on old bituminous pavements before placing a wearing course or any new layer of bituminous pavement.

2.2.3 Bituminous concrete binder course

intermediate course between the base course and the wearing course; consists of intermediate-size aggregate bound by bituminous material.

2.2.4 Aggregate Base Course

Gravel or crushed stone course immediately below the bituminous concrete surface course.

2.2.5 Subgrade:

Existing or borrow earth foundation upon which pavement is constructed.

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2.3 EXECUTION

The paving shall consist of full depth pavement section. Place the pavement as indicated

2.3.1 Preconstruction Conference and site visit

A joint working conference attended by the Contracting Officer’s Technical Representative and the paving contractor shall be held prior to actual paving operation to confirm required drainage slopes, traffic flow and control, paving work sequencing, work start and stoppage, requirements for safety signs and barricades and other construction constraints that need to be considered.

Prior to actual paving operations, a walk-thru of the entire project area by the Contracting Officer’s Technical Representative and Contractor shall be conducted to ensure the following:

(1) All compaction requests have been satisfied;

(2) All manhole and storm drainage covers have been raised to finish grade;

(3) No obstructions or stalled vehicles will impede paving operations;

(4) Required surface preparation has been accomplished and entire area is ready for bituminous surfacing.

2.3.2 Weather Limitations

2.3.2.1 Wearing Course

Place the bituminous mixture only during dry weather and on dry surfaces. Place courses only when the surface temperature of the underlying course is greater than 7 degrees Centigrade for course thickness greater than 2.5 centimeters and 12 degrees Centigrade for course thickness of

2.5 centimeters or less.

2.3.2.2 Tack Coat

Apply the tack coat only when the surface is dry or contains moisture not in excess of the amount that will permit the uniform distribution and the desired penetration. Apply the prime coat and tack coat, only when the ambient temperature is 5 degrees Centigrade or above and when the temperature has not been below 2 degrees Centigrade for 12 hours immediately prior to application, unless otherwise directed.

2.3.3 Removal of Existing Pavements

The removal of existing pavements shall consist of complete or partial removal of bituminous or concrete pavement in the areas as specified in the delivery order. Delivery orders shall indicate if base course and sub-base shall be removed in conjunction with the pavement removal. Depth of removal shall be specified on the delivery order.

2.3.3.1 Pavement sawcut

Saw-cutting of asphalt pavements for the creation of joints, gutters, trenches and controlled demolitions of roads, industrial floors, slabs, etc.

2.3.3.1.1 Pavement sawcut, 10cm deep

2.3.3.1.2 Pavement sawcut, 20cm deep

2.3.3.2 Removal of Bituminous Wearing Course, Binder Course and Base Course, up to

25cm Demolition and removal of bituminous concrete pavement consisting of base course, binder course and wearing course, 25 centimeters average thickness, Item includes:

− Loading and transportation of resulting materials to authorized public dump area;

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− The payment of the dump fees;

− All operations necessary for the workmanlike execution of the work.

2.3.3.3 Removal of Concrete Stabilized Subbase, up to 20cm

Demolition of concrete stabilized foundation, 20 centimeters average thickness, item includes:

− Excavation of foundation materials;

− Loading and transportation of resulting materials to authorized public dump area;

2.3.3.4 Removal of Compacted Subbase, up to 40cm

Demolition of compacted subbase, 40 centimeters average thickness, item includes:

− Excavation of foundation materials;

− Loading and transportation of resulting materials to authorized public dump area;

2.3.4 Milling of Asphalt Pavements

Existing asphalt pavements, where specified by delivery orders, shall be removed by milling to the depth indicated. Depth shall be measured from the existing pavement surface. Longitudinal or transverse profile controls shall be capable of providing an accuracy of 1 cm in 10 meters. The thickness of milling removal shall not vary from that specified by more than 4 mm.

2.3.4.1 Milling of existing wearing course, 2cm deep

2.3.4.2 Milling of existing wearing course, 5cm deep

2.3.4.3 Milling of existing wearing course, 7cm deep

2.3.5 Excavation:

The contractor can start excavation works only after the digging permit has been approved.

At all times during excavation, the on-site contractor must have in his possession, an approved Air Force Form 103.

Indicative to the nature and quality of the soil encountered, all excavation work shall be done to the depths and dimensions required for the correct positioning of the works to be provided. In the area where pipes, drains, cables, or other works are present, the contractor shall take all the precautions to protect such works from damage. All excess material not intended for use as backfill material shall be disposed of in accordance with Section 02315 “Excavation and Fill” of the Master Technical Specifications for Construction Projects at Aviano AB, Italy, here attached, and chapter 1.3 of this specification.

2.3.5.1 Open section excavation

Excavation in any kind of soil and compactness, 100 centimeters average thickness.

2.3.5.2 Trench excavation

Excavation in any kind of soil and compactness, 200 centimeters average thickness.

2.3.6 Fill, Backfill and Compaction

Excavated materials classified as satisfactory soil material shall be stockpiled, where directed, until required for backfill or fill. Stockpiles shall be placed, graded, and shaped for proper drainage, and stored in a manner to prevent contamination and segregation. Materials required in the work shall be

SECTION C – TECHNICAL SPECIFICATION FOR PAVINGS 15

located and retained a sufficient distance from the edge of excavations to prevent such material from falling or sliding back into the excavations, and to prevent cave-ins. Waste materials, such as excavated material classified as unsatisfactory soil material, trash, debris, and excess satisfactory soil material, shall be disposed of as specified hereinafter.

All material for fill and backfills shall be carefully selected, free from roots, vegetable matter, or other injurious substances. Fill and backfill material shall consist of loam, sandy clay and gravel or other suitable materials. Earth backfill shall be used on the top layer where required. Backfill materials shall be compacted to a density not below 95% of modified AASHO testing. In absence of such indications, backfill materials shall be compacted at the same density as the removed or surrounding soil and to the elevations indicated in the delivery order. All removed topsoil shall be stocked at the work site and used for filling and leveling of the area according to the delivery order.

The subgrade of soils in cut shall have a density of at least 95 percent of the maximum density to a depth of 30 centimeters below the subgrade surface. If the density of the existing material is less than 95 percent, it shall be compacted to a depth of 30 centimeters to the minimum 95 percent density. Fill, embankment, and/or backfill under concrete floor slabs and the upper 30 centimeters under paved areas shall be compacted to not less than 95 percent of the maximum density; other backfill adjacent to and not supporting any structural elements to at least 90 percent. The upper 30 centimeters of trenches shall be compacted to at least 95 percent maximum density.

2.3.7 Compaction Equipment

The compaction of soil materials for backfills and fills shall be performed by use of the specified compaction equipment that is suitable for the soil material being compacted and for use in the location of the work area.

All compaction equipment shall be of suitable size and number, and in satisfactory working condition to complete the work on schedule. Compaction equipment shall consist of pneumatic tired rollers, tamper rollers, vibrating tampers, or other compaction equipment suitable for the soil material being compacted and capable of obtaining the required density throughout the entire layer being compacted.

2.4 SUBGRADE FOR NEW ASPHALT PAVEMENTS – SUBBASE AND BASE COURSE

All new asphalt pavements constructed under this contract shall be provided with one of the following sub-base and base course alternatives. In locations where the new pavement adjoins existing pavement, a joint between the two paved surfaces shall be provided as shown in the attached drawing.

2.4.1 Compacted subbase and Base Course – Subgrade Alternative 1, 40cm thick Sub-base preparation shall be accomplished in accordance with Section 02315 “Excavation and Fill” of the Master Technical Specifications for Construction Projects at Aviano AB, here attached. The compacted sub-base thickness shall be 30 cm.

Base course shall be provided in accordance with Section 02722 “Graded Crushed Aggregate Base Course for Flexible Pavement” and Section 02724 “Aggregate Base Course and Sand Subbase Course” of the Master Technical Specifications for Construction Projects at Aviano AB, here attached.

The compacted base course thickness shall be 10 cm.

2.4.2 Subgrade Alternative 2 – 45cm thick

Base Alternative 2 shall meet the same requirements as Base Alternative 1 except that the compacted sub-base thickness shall be 25 cm and the compacted base course thickness shall be 20 cm.

2.4.3 Subgrade Alternative 3 - 47cm thick

Base Alternative 3 shall meet the same requirements as Base Alternative 1 except that the compacted sub-base thickness shall be 30 cm and the compacted base course thickness shall be 17 cm.

SECTION C – TECHNICAL SPECIFICATION FOR PAVINGS 16

2.5 BINDER COURSE, WEARING COURSE AND ASPHALT OVERLAY

2.5.1 Surface Preparation

Asphalt paving generally consists of binder and wearing courses; however, for overlays the binder course is required only in holes or depressions necessary to bring the entire area to required levels prior to the application of the wearing course. All pavements shall be finished to the thickness indicated in the delivery orders. Asphalt pavements to be provided under this contract shall be provided in accordance with one of the following asphalt pavement alternatives. To achieve good adhesion, tack and prime coats shall be provided as integral elements of all the alternatives below.

Preparation of existing bituminous pavement surfaces to receive overlays shall be done in accordance with Section 02741 “Bituminous Concrete Pavement” and Section 02749 “Hot-Mix Asphalt (HMA) For Airfields”.

Sections 1.4, 1.4.3, 1.9, 3.8 and 3.9 of Section 02741 “Bituminous Concrete Pavement” shall be applied only for projects over 10000 sqm.

Sections 1.3, 1.8, 2.3, 3.8 of section 02749 “Hot-Mix Asphalt (HMA) For Airfields” shall be always applied unless otherwise specified in the Delivery Order.

All surfaces to receive asphalt overlay shall be swept clean of dust, dirt, and all materials that are not a bonded part of the pavement surface. Pavement shall be dry before and during sweeping and laying of asphalt.

Following the preparation of existing pavements to receive asphalt overlay or preparation of sub-base and base course in accordance with the paragraphs above, asphalt pavement shall be provided in accordance with Section 02741 “Bituminous Concrete Pavement “and Section 02749 “Hot-Mix Asphalt (HMA) For Airfields”.

Asphalt paving generally consists of binder and wearing courses; however, for overlays the binder course is required only in holes or depressions necessary to bring the entire area to required levels prior to the application of the wearing course. All pavements shall be finished to the thickness indicated in the delivery orders. Asphalt pavements to be provided under this contract shall be provided in accordance with one of the following asphalt pavement alternatives. To achieve good adhesion, tack and prime coats shall be provided as integral elements of all the alternatives below.

2.5.2 Asphalt Alternative 1 - 9cm thick

This alternative provides new pavement over a subgrade prepared in accordance with Section 2.4 Asphalt Alternative 1 consists of a binder course with a finished thickness of 6 cm and a wearing course with a finished thickness of 3 cm.

2.5.3 Asphalt Alternative 2 - 10cm thick

Pavement provided under this alternative shall meet the same requirements as Asphalt Alternative 1 above except that the finished binder course thickness shall be 7 cm and the finished wearing course thickness shall be 3 cm.

2.5.4 Asphalt Alternative 3 - 12cm thick

Pavement provided under this alternative shall meet the same requirements as Asphalt Alternative 1 above except that the finished binder course thickness shall be 8 cm and the finished wearing course thickness shall be 4 cm.

2.5.5 Asphalt Alternative 4 - 12cm thick:

Pavement provided under this alternative shall meet the same requirements as Asphalt Alternative 1 above except that the finished binder course thickness shall be 7 cm and the finished wearing course thickness shall be 5 cm.

SECTION C – TECHNICAL SPECIFICATION FOR PAVINGS 17

2.5.6 Overlay Alternative 1 - 4cm thick over existing pavement This alternative consists of an overlay of an existing pavement surface with a wearing course. The finished thickness of the wearing course shall be 4 cm.

2.5.7 Overlay Alternative 2 – 6 cm thick over existing pavement Overlay Alternative 2 shall meet the same requirements as Overlay Alternative 1 above except that the finished thickness of the wearing course shall be 6 cm.

2.6 MULTIFUNCTIONAL WEARING COURSE:

This particular type of asphalt is to be used for airfield only.

Furnishing and placement of high resistance asphalt mix for MULTIFUNCTIONAL type wearing course, prepared with limestone aggregates as per general master specifications. The asphalt mix shall be bound with special high-viscosity (HARD) bitumen, modified with adequate additives in order to increase the physical-mechanical characteristics of the final mix. The asphalt mix shall be installed in place through vibratory rollers, after prior spraying of 0.5 Kg. /SM bituminous emulsion tack coat. The work item includes all that is necessary to give a job completed in a workmanlike manner. Finished thickness 3 cm. (in accordance with UFGS Section 02740 “Stone Matrix Asphalt (SMA) for Airfield Pavements”) Here are reassumed the major characteristics:

• Gradation: Relatively close to the one specified by USAF but tends to be on the fine side.

• Compaction energy: 75-Blow Marshall

• Asphalt cement content: 5.4% maximum

• Air Voids: 1.6 % (75-Blow) and 3.6% (50-Blow). 75% Marshall at 180 Deg-C

• Stabilizer: either mineral fibers as recommended by USAF or SBS elastomer modifier.

Everything required in Section 02749 “Hot-Mix Asphalt (HMA) For Airfields” shall be applied unless otherwise specified in the Delivery Order. It is extremely important that all standard practice procedures for this particular kind of asphalt are strictly followed.

2.7 TESTING:

If required by the delivery order, the contractor shall perform extra tests as specified below. The tests will be paid by the government. The contractor shall be responsible for the completion of tests as indicated by the delivery order. The testing shall be carried out by a certified laboratory that has been chosen by the contracting officer or his designated representative from a list of laboratories submitted by the contractor. The cost of each test will include: sampling, transportation, and testing. Any damage to, or other disruption of works provided under the delivery order resulting from sampling and testing procedures shall be repaired by the contractor at his own expense.

2.7.1 Base Course Testing:

If required by the delivery order, tests accomplished to determine the acceptability of materials shall be, in accordance with Section 02722 “Graded Crushed Aggregate Base Course for Flexible Pavement” and Section 02724 “Aggregate Base Course and Sand Subbase Course” of the Master Technical Specifications for Construction Projects at Aviano AB, Italy, here attached:

2.7.1.1 Sieve Analysis;

2.7.1.2 Liquid Limit and Plasticity Index;

2.7.1.3 Compaction Test.

The three tests above shall be accomplished together.

Additional tests may be required to determine:

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2.7.1.4 Field density

(2 samples, with moisture content calculation) in accordance with Section 02722 and Section 02724 of the Master Technical Specifications for Construction Projects at Aviano AB, Italy, here attached.

2.7.1.5 Plate load bearing tests

(30 cm diameter) shall also be accomplished if required by the delivery order in accordance with Section 02722 and Section 02724 of the Master Technical Specifications for Construction Projects at Aviano AB, Italy, here attached.

2.7.2 Asphalt Testing:

If required by the delivery order, tests accomplished to determine the acceptability of material provided, in accordance with Section 02741 “Bituminous Concrete Pavement” and Section 02749 “Hot-Mix Asphalt (HMA) For Airfields, shall be:

2.7.2.1 Bitumen content analysis;

2.7.2.2 Sieve analysis on aggregates;

2.7.2.3 Marshall Test.

The three tests above shall be accomplished together.

Additional test may be required to determine:

2.7.2.4 Void and density after rolling test

to determine the (2 specimens) in accordance with Section 02741 “Bituminous Concrete Pavement” and Section 02749 “Hot-Mix Asphalt (HMA) For Airfields”.

2.8 CRACK REPAIR - HOT SEALING WITH MODIFIED BITUMEN:

Hot sealing of cracks and joints performed by application of “HARD” type, hot modified bitumen, after prior joint air-pressure cleaning. To be used mainly in joints between asphalt pavements and concrete pavements.

Work shall be in compliance with the following procedure:

− Blowing and cleaning. During this first phase, a preliminary blowing and thorough cleaning of the cracks is carried out by means Crack Jet machinery, which in addition to emitting compressed air provides for heating the edges of the crack at very high temperatures (about 200 ° C). This activity is done in order to dry the crack, eliminate dust and debris and, above all, to ensure that the final repair is done by HOT-HOT sealing.

− Sealing of cracks. The second phase consists in the pouring the bituminous polymeric mastic into the crack. Following the previous heating, the rubber will penetrate deeper into the crack, adhering perfectly to the edges of the crack.

− Complete cleaning of the intervention areas, with the aim of avoiding the spread of debris and dust in the area subject to repair.

2.8.1 Hot sealing with modified bitumen, up to 100 lm

2.8.2 Hot sealing with modified bitumen, over 100 lm

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SECTION C-3 CONCRETE PAVEMENTS

3.1 REFERENCES

CNR Bollettino Ufficiale no. 4 “Standards for coarse aggregates, fine aggregate, granular material, sand and additives for roadway construction”.

D.M. 17/01/2018 Technical Rules for Construction

UNI EN 933 Tests for geometrical properties of aggregates

UNI EN 1097 Tests for mechanical and physical properties of aggregates

UNI EN 13286 Unbound and hydraulically bound mixtures

UNI EN 12350-2 Testing fresh concrete – Slump Test

UNI EN 12350-7 Testing fresh concrete - Part 7: Air content - Pressure methods

EN 206:2013+A1:2016 Concrete - Specification, performance, production and conformity

3.1.1 Manufacturer’s Publications/Manuals

− CONPAVIPER – Codice della buona pratica per i “Pavimenti industriali in calcestruzzo” − CONPAVIPER – Codice della buona pratica per i “Massetti interni ed esterni”

Specifications for Construction Projects at Aviano AB, Italy, as updated and attached to this Technical Specification:

01101 Project Sign 02220 Site Demolition 02231 Clearing and Grubbing 02315 Excavation and Fill 02724 Aggregate Base Course and Sand Subbase Course 02751 Concrete Pavement for Airfields and Other Heavy-Duty Pavements 02762 Joints, Reinforcement, and Mooring Eyes in Concrete Pavements 03300 Cast-In-Place Concrete

3.2 SUBMITTALS:

3.2.1 Product Data:

− Curing materials − Admixtures

3.2.2 Design Data – Mix Design:

At least 30 days prior to the mixing and placing of concrete, submit mix design for approval. Furnish a complete list of materials including type, brand, source and amount of cement, fly ash, pozzolan, SECTION C – TECHNICAL SPECIFICATION FOR PAVINGS 20 admixtures, aggregates, and applicable reference specifications. Obtain acknowledgement of approvals prior to concrete placement. Submit a new mix design for each material source change.

3.2.3 Test Reports

As indicated in paragraph 3.8.2 of Section 02751 “Concrete Pavement for Airfields and Other Heavy- Duty Pavements”:

− Aggregate tests − Concrete slump tests − Air content tests − Pavement thickness tests − Flexural strength tests − If required by the delivery order, a sample of concrete shall be tested to determine the 28-day compressive characteristic strength of the concrete.

3.2.4 Certificates:

− Ready-mixed concrete plant identification − Batch ticket information − Cementitious Material − Aggregates − Admixtures − Curing materials

3.3 DELIVERY, STORAGE AND HANDLING:

3.3.1 Cement

Store bagged material in a dry weathertight ventilated structure. Stack bags close together to reduce circulation of air but do not stack against outside walls. Transfer bulk material to weatherproof bins.

Test cement stored longer than 6 months by standard mortar tests or loss on ignition tests to determine whether suitable for use. Do not use such cement without approval of the Contracting Officer’s Technical Representative.

3.3.2 Aggregates

Sufficient aggregate shall always be stored at the site to permit continuous, uninterrupted operation of the mixing plant while concrete is being placed. Store aggregates in a manner to minimize segregation and prevent contamination. Store different sizes in separate piles. Stockpile coarse aggregates in thin, horizontal layers with no cone stockpiling permitted. Should coarse aggregates become segregated, remix stockpile to conform to the specified grading requirements.

3.3.3 Admixtures

Store admixture in undamaged containers which will prevent evaporation. Do not use admixtures stored longer than 15 months.

3.4 EXECUTION – PAVEMENTS

3.4.1 Reinforced Concrete Pavements for Aprons and Parking Lots:

Placement of 20 cm thick reinforced concrete pavement, including:

• Excavation in any kind of soil and transportation of resulting material to authorized public dump;

• Furnishing and placing of gravel material, 40-50 mm size, average thickness 20 cm, to provide for subbase, compacted to a density not below 95% of modified AASHO testing. Furnishing and

SECTION C – TECHNICAL SPECIFICATION FOR PAVINGS 21

placing of cement stabilized gravel material, average thickness 10 cm, to provide for base course.

Cement shall be 6% of the gravel material weight.

• Furnishing and installation of 250 Gr/Sq. m polyethylene layer;

• Furnishing and cast-in-place of C28/35 concrete. Pavement shall be reinforced, with 20x20 cm electrowelded steel mesh, 8mm diameter wire. Pavement shall be provided with contraction and construction joints, modular spacing 400x400cm, sealed with hydrocarbon resistant bi-component polyurethane sealant and the placing of preformed polystyrene joint filler. See below for further details.

• Spheroidal quartz finishing, if required by the delivery order;

Refer to Norms: Section 02751 “Concrete Pavement for Airfields and Other Heavy Duty Pavements” of the Master Technical Specifications for Construction Projects at Aviano AB, Italy, here attached. Paragraph 1.2, 2.1.3.1, 3.8 of Section 02751 “Concrete Pavement for Airfields and Other Heavy-Duty Pavements” shall be applied only for projects over 500 sqm.

3.4.2 Airfield Concrete Pavements:

Placement of 30 cm. thick concrete pavements (unless otherwise specified in the Delivery Order), including:

- Excavation in any kind of soil and transportation of resulting material to authorized public dump, it includes the payment of dump fees.

- Furnishing and placing of gravel material, 40-50 mm granulometry, average thickness 30 cm, to provide for concrete pavement foundation, compacted to a density not below 95% of modified AASHO testing. Including soil compaction to a density not below 95% of modified AASHO testing and furnishing and spreading of granular total herbicide (7.5 grams of pure chlorthiamide/100 grams of product); ratio100 kg/1,000 sq.m).

- Furnishing and installation of 250 Gr/sq.m polyethylene layer to be placed between granular subbase and concrete pad.

- Furnishing and cast-in-place of C32/40 concrete pavement, 30cm thick. Pavement shall be provided with contraction, expansion and construction joints, modular spacing 510x510cm, sealed with hydrocarbon resistant bi-component polyurethane sealant, closed cell polyethylene foam backer rod and the placing of 10mm thick preformed polystyrene joint filler.

Concrete specifications as follow:

- Concrete class: C32/40 (Rck400)

- Minimum cement factor, kg/cu.m: 320

- Exposure class: XF3

- Slump: S4 min.

- Coarse aggregates: max. size 30mm

- Water-cement ratio: max. 0.50

- Air content: min. 4%

- Furnishing and installation of ∅30mm dowel smooth steel bar @40cm, l=50cm. One side of dowel bar shall be painted with epoxy coating and greased to prevent bonding with the concrete.

Item includes drilling with premixed unshrinkable mortar at jointing with existing concrete, if any.

As per Refer to Norms: Section 02751 “Concrete Pavement for Airfields and Other Heavy-Duty Pavements” of the Master Technical Specifications for Construction Projects at Aviano AB, Italy, here attached.

Sections 1.2, 2.1.3.1, 3.8 of Section 02751 “Concrete Pavement for Airfields and Other Heavy-Duty Pavements” shall always be applied unless otherwise specified in the delivery Order.

3.4.3…