Maintenance and Surface Preparation Activities Prior to Pavement Preservation Treatments (2021) / Chapter Skim
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8 The results of the review of relevant publications are summarized in this chapter. A literature search identified available information on the links between (1)
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Literature Review 9 Texas chip seal guidelines also note repairs that are needed prior to placing a chip seal, specifically indicating that cracks wider than 1/8 inch should be crack-sealed well ahead of seal coat placement (Texas DOT 2017)
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10 Maintenance and Surface Preparation Activities Prior to Pavement Preservation Treatments Treatment Recommended Existing Surface Preparation Crack sealing Clean or rout cracks. Fog seal Repair and patch all major defects; fill all cracks, other than hairline, with suitable bituminous crack filler.
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Literature Review 11 Connecticut DOT's draft guidance also introduces the concept of "ancillary treatments" that are to correct "secondary distress forms that are present but are not driving the deterioration of the pavement, or for isolated distress conditions for which the primary treatment does not provide relief (such as spot base failures, for instance, or pushing or shoving at a particular intersection) ." The following ancillary treatments are identified as candidates for specified distresses: crack sealing, crack filling, surface patches, partial-depth patching and full-depth patching (for composite pavements)
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12 Maintenance and Surface Preparation Activities Prior to Pavement Preservation Treatments The Indiana DOT preservation guidelines include the observation that "the type and severity of distresses on existing pavement are major factors in selecting a treatment" (Lee and Shields 2010)
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Literature Review 13 The National Concrete Pavement Technology Center published an extensive guide to concrete pavement preservation (Smith et al.
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14 Maintenance and Surface Preparation Activities Prior to Pavement Preservation Treatments joint and crack sealing, diamond grinding, dowel bar retrofit, partial-depth repair, full-depth repair, cross stitching, and longitudinal diamond grooving -- only the grinding and grooving checklists specify pre-treatment repairs. Those repairs are designed to ensure that broken or rocking slabs are repaired or replaced and to verify that other pavement repairs are conducted -- except for the joint sealing and partial-depth repairs using elastomeric-based concrete, which are completed after grinding (Federal Highway Administration 2019)
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Literature Review 15 Contracting In only a few instances do states address the matter of how maintenance and surface preparation before preservation are accomplished. In Kansas, milling and planing are "normally included with the chip seal contract, allowing the Contractor to coordinate the work" (Testa and Hossain 2014)
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16 Maintenance and Surface Preparation Activities Prior to Pavement Preservation Treatments Source: National Center for Asphalt Technology (2019)
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