Performance-Related Specifications for Pavement Preservation Treatments (2017) / Chapter Skim
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From page 17... ...
17 3.1 Relevant Issues in Pavement Preservation The guidelines for developing PRS for pavement preservation treatments will differ from those for rehabilitation and reconstruction of flexible and rigid pavements for the following reasons: 1. Preservation treatment performance is greatly influenced by the pre-existing pavement conditions with respect to both structural capacity and functional condition.
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From page 18... ...
18 performance-related Specifications for pavement preservation treatments 3.2 Commonly Used Preservation Treatments Preservation practices of several highway agencies (i.e., Alaska, California, Colorado, Georgia, Indiana, Michigan, Minnesota, New Mexico, North Carolina, Ohio, Oregon, Rhode Island, Texas, Washington, and Wisconsin) were evaluated based on information contained in the literature (Peshkin et al.
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From page 19... ...
Current practice 19 Treatment Type/Climate Purpose Performance Measures AQCs Road Class Chip Seal (DF) Seal longitudinal, transverse and block cracking, inhibit and retard raveling/weathering, improve friction, improve ride quality, inhibit moisture infiltration Raveling, stripping bleeding flushing, cracking and rutting, friction loss, roughness, moisture infiltration Emulsion application rate Aggregate application rate Application temperature Asphalt and aggregate material type Texture depth Rural Crack Seal (DF, MF)
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20 performance-related Specifications for pavement preservation treatments Climate Zone FI Range Location Deep freeze (DF) FI > 400 Northern states Moderate freeze (MF)
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Road Climatic Region Crack Fill Crack Seal Slurry Seal Microsurfacing Single Chip Seal MultiChip Seal Thin HMA Overlay Cold Milling Hot IPR Cold IPR Rural Deep freeze E E L E E E L L E Moderate freeze E E M L L E E L E No freeze M M L M M M M L L Urban Deep freeze E E L M M M E L M Moderate freeze E E M M L E E M L No freeze E E M M E M M E M M M M E L M Note: IPR = In-place recycling, E = Extensive use (>66%) , M = Moderate use (33% to 66%)
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From page 22... ...
22 performance-related Specifications for pavement preservation treatments Treatment Types Performance Measures Materials and Construction Characteristics Joint reseal Crack seal Longitudinal cracking, transverse cracking, corner cracking - crack seal more effective when faulting, palling not present Material characteristics of sealant – shape factors, sealant bond, depth of sealant Cleanliness of joint or crack Placement considerations based on material, experience, additional anticipated treatments Tack free sealants while setting Diamond grinding and grooving Joint faulting, slab curling and warping, and friction loss (grinding) ; friction loss and splash and spray (grooving)
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From page 23... ...
Current practice 23 numerous studies have shown the typical ranges of SLEs for different preservation treatments. Variations in these may be attributed to the timings of treatment application.
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