Pavement Patching Practices (2014) / Chapter Skim
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34 This chapter presents the findings of surveys and communications with local agencies in the United States, as well as agencies outside the United States, relative to their pavement patching practices. The states' practices are compared with those of the local agencies and international organizations.
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35 patching operations (see Figure 32)
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0% 20% 40% 60% 80% 100% UK/Ireland US Local US State Survey response Potholes Deterioration at paving joint Deterioration at previous patch Deterioration around cracks Joint failure Rutting Spalling Delamination Material distress Blowups Raveling Corner Breaks Punchouts Segregation Faulting FIGURE 29 Comparison of U.S. state, local, and U.K.
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0% 20% 40% 60% 80% 100% State forces Paving contractor Specialty contractor Other State forces Paving contractor Specialty contractor Other State forces Paving contractor Specialty contractor Other UK /Ir el an d US Lo ca l US S ta te Survey response Planned patching Reactive patching FIGURE 31 Comparison of U.S. state, local, and U.K.
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38 with a greater level of interest in patching or may depend on how they interpret the term QC/QA. The procedures used to assess quality are reported to include measuring density, concrete strength, survival of the patch, thickness, quality of materials, and smoothness.
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39 FIGURE 35 Comparison of U.S. state, local, and U.K.
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40 0% 20% 40% 60% 80% 100% UK/Ireland US Local US State Survey response Hot asphalt mix Generic stockpile mix Spray emulsion and aggregate Proprietary asphalt mix Warm mix asphalt Polymeric materials Crumb rubber mastic Other FIGURE 38 Comparison of U.S. state, local, and U.K.
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41 As there was variability between the states, there was also variability found among the local agencies responding to the survey. There were also differences between the responses from local agencies compared with the state agencies.
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42 responses for U.S. state and local agencies, respectively.
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43 • As in the United States, there was little consistency in how the costs of patching were tracked and reported. • The same distresses were deemed suitable for repair by patching as in the United States.
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