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This is a technical specification document for crack sealing services in asphalt concrete pavements at Tinker Air Force Base, Oklahoma, dated April 2019.
The specification covers furnishing and installation of materials for crack sealing in asphalt pavements, with products required to match existing materials or be as directed by the Contracting Officer. Products must comply with specific standards: Liquid Asphalt (ASTM D 2027, Grade MC-250), Emulsified Asphalt (ASTM D 977, Grade MS-2), Sealing Compound (Fed. Spec. SS-S-1401), and Fine Aggregate (natural sand or crusher dust, maximum 1/8 inch size, free of clay and organic matter). Installation procedures must follow product manufacturer recommendations, with demolition and removal of materials as required to support the work.
Execution requirements specify that all cracks be cleaned of dirt and debris using portable air compressors and stiff bristle brooms. Heating equipment for liquid asphalt must be mobile with agitating devices, thermometers, and gravity-type draw-off valves. Sealing compound equipment consists of double boiler, agitator-type kettles with oil medium heat transfer and circulation systems. Application equipment must have appropriately sized spouts or nozzles to prevent air entrapment. Installation procedures require sealing all cracks 1/8 inch wide and wider, with cracks 1/2 inch and wider first filled with fine sand and emulsified or liquid asphalt slurry before sealing. Temperature control is critical to allow material to flow freely and completely fill cracks without entrapping air. The contractor is responsible for all traffic control measures, including barricades and flagmen, preventing vehicle traffic until sealer has fully cooled.
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Text version
Tinker AFB, OK TAFB Technical Specifications 2019
April 2019 Page 1 Section 32 01 17
SECTION 32 01 17
CRACK SEALING IN ASPHALT CONCRETE PAVEMENTS
PART 1 GENERAL
1.1 DESCRIPTION OF WORK
This specification covers the furnishing and installation of materials for crack sealing of asphalt concrete pavements. Products shall match existing materials and/or shall be as directed by the Contracting Officer. Installation procedures shall be in accordance with the product manufacturer's recommendations. Demolition and removal of materials shall be as required to support the work.
PART 2 PRODUCTS
2.1 LIQUID ASPHALT
Liquid Asphalt shall comply with ASTM D 2027, Grade MC-250.
2.2 EMULSIFIED ASPHALT
Emulsified Asphalt shall comply with ASTM D 977, Grade MS-2.
2.3 SEALING COMPOUND
Sealing Compound shall comply with Fed. Spec. SS-S-1401.
2.4 FINE AGGREGATE
Fine Aggregate shall be natural sand or crusher dust and have a maximum size of not more than 1/8 inch and be free of clay and organic matter.
PART 3 EXECUTION
3.1 PREPARATION:
3.1.1 All Cracks to be sealed shall be cleaned of dirt and
debris.
3.1.2 Crack Cleaning Equipment shall consist of a portable air compressor with hose and nozzles for directing air directly into cracks and stiff bristle brooms.
3.1.3 Heating Equipment for Liquid Asphalt shall be mobile and shall be equipped with an agitating device for stirring material during heating, a thermometer, regulating
Tinker AFB, OK TAFB Technical Specifications 2019
April 2019 Page 2 Section 32 01 17 equipment for heat control, and a gravity type, draw off valve.
3.1.4 Heating Equipment for Sealing Compound: Unless otherwise required by the manufacturer's recommendations, the equipment shall be mobile and shall consist of double boiler, agitator type kettles with oil medium in the outer space for heat transfer. The applicator unit shall be so designed that the sealant will circulate through the delivery hose and return to the inner kettle when not sealing cracks.
3.1.5 Application Equipment shall have a spout or nozzle of such size that the sealing material will be placed in the cracks without entrapping air in cracks or spreading material on adjacent pavement surface.
3.2 INSTALLATION
3.2.1 Sealing Compound
All cracks one eighth of an inch wide and wider shall be sealed.
The application temperature for sealing compound shall comply with Fed. Spec. SS-S-1401. Cracks one half of an inch wide and wider shall be filled with a slurry of fine sand and an emulsified asphalt or liquid asphalt. After the slurry has cured, cracks shall be sealed with liquid asphalt or emulsified asphalt and lightly sanded.
3.2.2 Liquid and Emulsified Asphalt Sealer
The temperature shall be varied so that it flows freely into cracks and completely fills cracks without entrapping air. Cracks shall be free of moisture before filling and shall be filled slightly above the pavement surface. When excess sealer has been removed, the sealer shall be covered with fine sand.
3.2.3 Traffic Control
Traffic will not be permitted over sealed cracks until the sealer has cooled so that vehicle tires do not pick it up. The Contractor will be responsible for all barricades and flagmen necessary to control traffic.
- End of Section -
| PART 1 GENERAL |
| PART 2 PRODUCTS |
| 2.1 Liquid Asphalt |
| 2.2 Emulsified Asphalt |
| 2.3 Sealing Compound |
| 2.4 Fine Aggregate |
| part 3 EXECUTION |
| 3.1 Preparation: |
| 3.1.1 All Cracks to be sealed shall be cleaned of dirt and debris. |
| 3.1.2 Crack Cleaning Equipment shall consist of a portable air compressor with hose and nozzles for directing air directly into cracks and stiff bristle brooms. |
| 3.1.3 Heating Equipment for Liquid Asphalt shall be mobile and shall be equipped with an agitating device for stirring material during heating, a thermometer, regulating equipment for heat control, and a gravity type, draw off valve. |
| 3.1.4 Heating Equipment for Sealing Compound: Unless otherwise required by the manufacturer's recommendations, the equipment shall be mobile and shall consist of double boiler, agitator type kettles with oil medium in the outer space for heat transfer... |
| 3.1.5 Application Equipment shall have a spout or nozzle of such size that the sealing material will be placed in the cracks without entrapping air in cracks or spreading material on adjacent pavement surface. |
| 3.2 Installation |
| 3.2.1 Sealing Compound |
| 3.2.2 Liquid and Emulsified Asphalt Sealer |
| 3.2.3 Traffic Control |
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