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Significance and Use
4.1 This guide provides information to assist engineers with the design requirements and construction guidelines for paving an Open-Graded Friction Course (OGFC) surface layer. An OGFC is primarily used to improve the skid resistance and wear resistance of a bituminous pavement by providing an escape route for surface water beneath a moving wheel load. The mixture is typically produced with a low amount of fine aggregate particles and high air void content to provide a passageway of interconnected voids for moisture to drain away from the travelway. The film thickness of the asphalt and overall asphalt content is important for better stripping resistance and durability and aging properties.
1.1 This guide covers the construction of bituminous open-graded friction course plant mixtures. End-use specifications should be adopted to conform to job and user requirements. Where applicable, Specification D3666 should be applied as a minimum for agencies testing and inspecting road and paving materials.
1.2 Bituminous open-graded friction courses are placed as the final wearing course for highways and airfields.
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
C29/C29M Test Method for Bulk Density (Unit Weight) and Voids in Aggregate
C88 Test Method for Soundness of Aggregates by Use of Sodium Sulfate or Magnesium Sulfate
C127 Test Method for Density, Relative Density (Specific Gravity), and Absorption of Coarse Aggregate
C128 Test Method for Density, Relative Density (Specific Gravity), and Absorption of Fine Aggregate
C131 Test Method for Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine
C136 Test Method for Sieve Analysis of Fine and Coarse Aggregates
C1252 Test Methods for Uncompacted Void Content of Fine Aggregate (as Influenced by Particle Shape, Surface Texture, and Grading)
D75 Practice for Sampling Aggregates
D140 Practice for Sampling Bituminous Materials
D448 Classification for Sizes of Aggregate for Road and Bridge Construction
D946 Specification for Penetration-Graded Asphalt Cement for Use in Pavement Construction
D1461 Test Method for Moisture or Volatile Distillates in Bituminous Paving Mixtures
D2419 Test Method for Sand Equivalent Value of Soils and Fine Aggregate
D2995 Practice for Estimating Application Rate of Bituminous Distributors
D3381 Specification for Viscosity-Graded Asphalt Cement for Use in Pavement Construction
D3666 Specification for Minimum Requirements for Agencies Testing and Inspecting Road and Paving Materials
D4791 Test Method for Flat Particles, Elongated Particles, or Flat and Elongated Particles in Coarse Aggregate
D5821 Test Method for Determining the Percentage of Fractured Particles in Coarse Aggregate
D6114 Specification for Asphalt-Rubber Binder
D6307 Test Method for Asphalt Content of Hot-Mix Asphalt by Ignition Method
D6373 Specification for Performance Graded Asphalt Binder
D6390 Test Method for Determination of Draindown Characteristics in Uncompacted Asphalt Mixtures
D7064 Practice for Open-Graded Friction Course (OGFC) Mix Design
Other ReferencesFAA-RD-73-197 FAA-RD-74-38 NCATReportNo.2001-01 Design, Construction and Performance of New Generation Open-Graded Friction Courses TRBNCHRPSynthesis284 Performance Survey on Open-Graded Friction Course Mixes
ICS Number Code 93.080.20 (Road construction materials)
UNSPSC Code 30121500(Bituminous derivatives); 30120000(Roads and landscape)