Annotated Literature Review for NCHRP Report 640 (2009) / Chapter Skim
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Pages 275-280
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273 1.74.8 Structural Design No specifics on inclusion within structural design were given. 1.74.9 Limitations Open-graded mixes are not used in high elevation snow zones that require a significant amount of snow plowing.
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274 • Hydroplaning: OGFCs should be used in areas that have shown a high potential for wet weather accidents. These mix types will reduce hydroplaning potential by providing drainage channels for water to flow beneath the pavement surface.
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275 markings. When rain falls on an OGFC surface, the void structure allows the water to penetrate into the layer which allows for maximum contact between the tire and pavement surface.
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276 Caltrans does not design to a minimum air void content. However, the guidance document states that mixes designed as described above would have design air void contents near or above 18 percent.
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277 down aggregates within the OGFC and pneumatic tire rollers tend to pick up the OGFC. Also, the kneading action caused by pneumatic tire rollers tends to close the voids at the surface of the OGFC.
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278 Table 132: OGFC Temperature Limits Type OGFC Minimum Atmospheric Temperature Minimum Pavement Temperature Maximum Aggregate Temperature at Plant Recommended Minimum Breakdown Rolling Temperature Recommended Minimum Finishing Rolling Temperature Conventional (Normal)
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